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Your Last 7th Grade Science Review

Total questions: 216

Worksheet time: 2hrs 4mins

Name
Class
Date
1.

Which organelle allows cells to maintain a stable internal environment?

a)

cell membrane by separating the cell from the outside environment

b)

ribosomes by making protein

c)

chloroplasts by absorbing sunlight

d)

nucleus by controlling cell activities

2.

when WATER is moved across a cell membrane.

a)

osmosis

b)

diffusion

c)

photosynthesis

d)

cell reespiration

3.

PRODUCTS are glucose and oxygen

a)

osmosis

b)

diffusion

c)

photosynthesis

d)

cell reespiration

4.

REACTANTS (what you start with) are glucose and oxygen

a)

osmosis

b)

diffusion

c)

photosynthesis

d)

cellular respiration

5.

A cell is placed in a saltwater solution with the same concentration as inside the cell. What will happen?

a)

it will stay the same size

b)

it will shrink

c)

it will burst

d)

all of these

6.

Which of these terms describe a cell membrane?

a)

selectively permeable

b)

non-permeable

7.

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

a)

0%

b)

25%

c)

50%

d)

75%

8.

Which of the following genotypes is homozygous dominant?

a)

aa

b)

Aa

c)

AA

9.

Which of the following genotypes is heterozygous?

a)

Bb

b)

BB

c)

bb

10.

What is the likelihood that the offspring will be yellow?

a)

0%

b)

25%

c)

50%

d)

75%

11.

What is the likelihood that the offspring will be yellow (g)?

a)

25%

b)

50%

c)

75%

d)

100%

12.

What is the likelihood that the offspring will have brown eyes (B)?

a)

0%

b)

100%

13.

What is the probability that the offspring will have blue eyes?

a)

25%

b)

50%

c)

75%

d)

100%

14.

The tendency of a substance to move from an area of higher concentration to an area of lower concentration.

a)

diffusion

b)

osmosis

c)

active transport

d)

sodium-potassium pump

15.

The movement of water through a membrane from an area of higher concentration to an area of lower concentration.

a)

diffusion

b)

osmosis

c)

active transport

d)

sodium-potassium pump

16.

The process of using energy to move materials through a membrane.

a)

diffusion

b)

osmosis

c)

active transport

d)

passive transport

17.

Organelles that release energy by using oxygen to breakdown sugars

a)

cell membrane

b)

nucleus

c)

mitochondria

d)

chloroplast

18.

An organelle in a plant cell that contains chlorophyll, a chemical that uses the energy from sunlight to make sugar.

a)

cell membrane

b)

nucleus

c)

mitochondria

d)

chloroplast

19.

The variable that is being measured

a)

independent variable

b)

dependent variable

c)

constants

d)

control group

20.

The variable that is manipulated or changed. (What I change)

a)

independent variable

b)

dependent variable

c)

constants

d)

control group

21.

What gas makes up the majority of Earth's atmosphere?

a)

Nitrogen

b)

Oxygen

c)

Argon

d)

Helium

22.
What percentage of our atmosphere is made up of other gases such as argon, water vapor, and carbon dioxide?
a)
1%
b)
21%
c)
78%
d)
90%
23.
What is the percentage of oxygen in Earth's atmosphere?
a)
1%
b)
21%
c)
78%
d)
90%
24.
What is the percentage of nitrogen in Earth's atmosphere?
a)
1%
b)
21%
c)
78%
d)
90%
25.
The graph below shows CO2 emissions and temperatures from 1909 to 1949.  What conclusion is best supported by the graph?
a)
There is no relationship between carbon dioxide concentrations and temperatures
b)
As carbon dioxide concentrations increase, temperatures increase
c)
As carbon dioxide concentrations increase, temperatures decrease
d)
As carbon dioxide concentrations decrease, temperatures increase
26.
The main human activity that releases greenhouse gases is
a)
using bottled water
b)
burning fossil fuels
c)
texting on cellphones
d)
eating meat
27.

How does the Earth keep itself warm?

a)

Sunlight keeps the Earth warm.

b)

There are heat lamps orbitting above the Earth's atmosphere.

c)

The greenhouse gases trap the warm air and send it back to the Earth's surface.

28.
1.  Certain gases in the atmosphere – water vapor, carbon dioxide, methane and nitrous oxide – help maintain the Earth’s temperatures and climate. These are called: __________ . 
a)
A.  ozone gases
b)
A.  solar gases
c)
A.  greenhouse gases 
d)
A.  stomach gases
29.

A subatomic particle that has a negative charge

a)

nobles gases

b)

protons

c)

electrons

d)

neutrons

30.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
31.
This class of elements are sometimes called "semiconductors."
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Groups
32.

Metals are found on the ______________ side of the periodic table.

a)

nonmetals

b)

left

c)

right

d)

metals

33.

This group of elements sit along a stair step line on the periodic table and have properties of both metals and nonmetals. _________________________

a)

luster

b)

metals

c)

nonmetals

d)

metalloids

34.
Which of the following is a good conductor of heat?
a)
Metal
b)
Nonmetal
c)
Metalloid
35.

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a)

proton

b)

neutron

c)

electron

d)

matter

36.
Which is an electron?
a)
A
b)
B
c)
C
37.

Which color on the image of the periodic table corresponds with the metalloids.

a)

bright yellow

b)

gold

c)

teal

d)

light blue

38.

Which elements are colored red?

a)

nonmetals

b)

metals

c)

metalloids

39.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
40.
All of these properties describe metals except...
a)
malleable
b)
conductors
c)
brittle 
d)
shiny
41.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
42.

Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?

a)

an element

b)

compound

c)

mixture

d)

suspension

43.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
44.

This picture represents which of the following?

a)

A single element

b)

Mixture of molecules

c)

mixture of atoms

d)

mixture of compounds

45.

This diagram represents a _____.

a)

Element

b)

Compound

c)

Mixture of compound and element

d)

Mixture of two elements

46.

O2 is a compound molecule.

a)

TRUE

b)

FALSE

47.

What is the picture displayed?

a)

atom

b)

element molecule

c)

compound molecule

48.
In the equation,          2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
49.

Determined whether the following equation is balanced or unbalanced. Ag + O2 ---> 2Ag2O

a)

Balanced

b)

Unbalanced

50.

Determine whether the following equation is balanced or unbalanced. H2 + Br2 ---> 2HBr

a)

Balanced

b)

Unbalanced

51.

In order for an equation to be balanced, there must be ...

a)

an equal amount of atoms on both sides

b)

a greater mass on the product side

c)

a greater mass on the reactant side

d)

elements with the same atomic # on both sides

52.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Coefficient
53.
The law of conservation of mass states that....
a)
Matter can be made
b)
Matter can be destroyed
c)
Matter can neither be made or destroyed
d)
Matter can evaporate
54.
In the following concept map, some items are missing. Which of the following are items that could appear under Matter---Combines---Chemically? What three answers should be under Matter---Combines---Chemically?
a)
Fizzing occurs
b)
Color Changes
c)
Precipitate forms
d)
Heterogeneous mixture
e)
Dissolves
55.
At the beginning of the investigation, Carl recorded a total mass of 200g. After placing seltzer tablets in water, Carl again measured the mass. If the combined mass of the two seltzer tablets before they were dropped in the water was 5 g, select the total mass at the end of Carl's investigation.
a)
195 g
b)
197 g
c)
200g
d)
205g
56.
Mandy left a bottle of fizzing hydrogen peroxide on teh counter. Over the bottle opening, she attached a balloon. At the beginning of her investigation, the total mass of the bottle, balloon and liquid was 305 g. The fizzing hydrogen peroxide is an example of a(n)
a)
chemical change taking place
b)
mechanical change taking place
c)
physical change taking place
d)
evolutionary change taking place
57.
What cell organelle produces energy in plant cells?
a)
vacuole
b)
lysosome
c)
ribosome
d)
mitochondria
58.
Where are the most reactive metals located?
a)
light gray, section A
b)
dark gray, section B
c)
black, section C
d)
textured, section D
59.
Which organism shown in the image is a producer?
a)

deer

b)

grass

c)

buzzard

d)

All the organisms are producers.

60.
What is the name of the organism representing the most concentrated source of energy contained within its tissues?
a)
shark
b)
otter
c)
abalone
d)
plankton
61.
In class, John made a mixture of sawdust, water and iron filings. What will complete the series of activities John will best use to separate the items in the mixture? _____________ --> _________________--> gather sawdust
a)
stir --> filter
b)
evaporate --> use a magnet
c)
filter --> add water
d)
pick up --> add vinegar
62.
The graph shows a population estimate from 2000-2005. What most likely occurred between 2003 and 2004?
a)
There was an increase in food
b)
There was a decrease in predators
c)
There was a population decrease
d)
There was a deadly viral outbreak.
63.
The graph shows the changes of a grass population from 2007-2011. What do you predict most likely occurred between 2009 and 2010?
a)
an increase in light availbility
b)
a decrease in earthworms
c)
an increase in grazing animals
d)
a decrease in insects
64.
How does the energy move between the deer, grass and buzzard?
a)
The grass traps energy from the sun, and the deer consumes the grass; when the deer dies, the buzzard consumes the deer.
b)
The deer traps energy from the sun and the deer consumes the grass;when the deer dies, the buzzard consumes the deer.
c)
The buzzard traps energy from the sun, and the deer consumes the buzzard;when the buzzard dies, the grass consumes the buzzard.
d)
The grass traps energy from the sun, and the buzzard consumes the grass, when the buzzard dies, the deer consumes the buzzard.
65.
An African elephant population has few members and reproduces once every 2-5 years. How would this elephant population survive in a suddenly changed environment?
a)
The elephant population would adapt quickly to the change and survive.
b)
The elephant population would not adapt quickly to the change. It could become endangered or extinct.
c)
The elephant population would not adapt at all to the chnage and would become extinct.
d)
The elephant population would adapt to the change by reproducing more quickly.
66.
The wildfires occurring in California are not only deadly for California are not only deadly for California residents but may also have an effect on other forests around the world due to
a)
California forest fires starting fires in other parts of the world.
b)
the emission of CO2 and other greenhouse gases that can damage them.
c)
the extinction of Redwood trees in California forests
d)
the immigration of forest animals to the Amazon Rainforest
67.
Scientists have seen a correlation between increased volcanic eruptions and cancers in women over the last 30 years. What is the most likely reason for this situation?
a)
A change in the composition of atmospheric gases due to volcano emissions.
b)
The threat of lava flows close to villages near volcanoes.
c)
Human activity near volcanoes
d)
The movement of plates below the Earth's surface.
68.
The image shows an example of a(n) ___________________.
a)
food chain
b)
food web
c)
energy pyramid
d)
trophic level
69.
Eight Belles, a 2008 Kentucky Derby winning thoroughbred, was produced by _______ thoroughbred parents, which possessed the traits for agility and quickness.
a)
inbreeding
b)
co-evolutionizing
c)
naturally selecting
d)
selectively breeding
70.
In Hudson Bay, summer has arrived earlier each year since 1981. As a result, polar bears in that area have fewer offspring and lower survival rates. The population has a
a)
positive growth rate
b)
negative growth rate
c)
stable growth rate
d)
density dependent growth rate
71.

In some fruit flies, the allele for having black eyes (B) is dominant to the allele for having red eyes (b). A scientist mated a batch of fruit flies with genotypes as shown in the Punnett Square below. What is the probability of the offspring will be born with red eyes?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

72.
____________________ occurs when you chew your food and when your stomach moves the food.
a)
Osmotic movement
b)
Chemical movement
c)
homeostatic movement
d)
mechanical movement
73.
Look at the image. The arrow in the image represent gases exchanged between plants and animals.Which statement BEST describes the gas exchange illustrated?
a)
Animals produce oxygen that plants release
b)
Plants produce carbon dioxide that animals use to produce oxygen
c)
Animals release carbon dioxide that plants use in photosynthesis
d)
Plants release oxygen that animals use to produce chlorophyll
74.
The union of gametes, the sperm and an egg, during the life cyucle of the crown jellyfish is best described as
a)
asexual reproduction
b)
genetic inheritance
c)
sexual reproduction
d)
genetic engineering
75.
Graham places 5 grams of iron filings in each of four containers. He then adds various other substances to each container. Use the observations Graham recorded in the following table to choose the container in which a chemical change occurred. In what container did a chemical reaction occur?
a)
Container 1
b)
Container 2
c)
Container 3
d)
Container 4
76.
E83 ethanol can be produced from various food products including sugar cane and sugar beets. What is one unintended consequence of producing E83 ethanol?
a)
reduce dependence of fossil fuels
b)
renewable source of energy
c)
increase in cost of sugar
d)
cleaner engines
77.
Look at the image. The illustration shows structures of the human body. Select three correct answers. The functions of the structure labeled X are
a)
forming blood cells
b)
moving the body
c)
supporting the body
d)
transmitting nerve impulses
e)
helpin the body breathe
78.
Look at the diagram. Select three correct answers. The function of this organ system are
a)
providing nutrients to cells
b)
transporting oxygen to cells
c)
removing wastes
d)
producing offspring
e)
making hormomes
79.
Use the image of a portion of the Periodic Table and your scientific knowledge to answer the question. Which statement is not true about the relationship between oxygen and sulfur?
a)
Sulfur has half the neutrons of oxygen
b)
Sulfur and oxygen have similar reactivity
c)
Sulfur has twice the mass of oxygen
d)
Sulfur and oxygen are found in the same period on the Periodic Table
80.
Sonya investigates reacting methane gas (CH4) with oxygen (O2). The chemical equation representing Sonya's reaction is written: CH4 + 2O2 --> CO2 + 2 H2O If there were 10 methane molecules on the reactants side but the products remained the same as shown in the equations above, the chemical equation would be
a)
difficult to react
b)
balanced
c)
unbalanced
d)
another chemical reaction
81.
Sonya investigates reacting methane gas (CH4) with oxygen (O2). The chemical equation representing Sonya's reaction is written: CH4 + 2O2 --> CO2 + 2 H2O Part A: If there were 10 methane molecules on the reactants side but the products remained the same as shown in the equations above, the chemical equation would be_____. Which law best supports Sonya's chemical equation and the answer to Part A.
a)
Newton's Laws of Motion
b)
Law of Gravity
c)
Law of the Conservation of Mass
d)
Avogadro's Law
82.
Look at the pictures below. Which image represents the phase of matter having both a definite volume and shape?
a)
M
b)
P
c)
R
d)
S
83.
A sample of water vapor cools and changes from a gas to liquid water. Select the correct answer. What happens to the molecules as they changed from a gas to a liquid?
a)
The molecules slow down and get closer together.
b)
The molecules slow down and get farther apart.
c)
The molecules get faster and increase in size.
d)
The molecules get faster and closer together.
84.
Which substance is an element?
a)
NaCl
b)
Mg
c)
KBr
d)
CH4
85.
Which substance is a compound?
a)
Cl
b)
KCl
c)
Na
d)
Br
86.
Goldis a good conductor of electrical energy. It is often used in circuit boards. Select the correct answer. Which other element is likely used in circuit boards?
a)
Copper
b)
Calcium
c)
Boron
d)
Barium
87.
Mara has a glass beaker of water with a thermometer in it. She lets it sit on her laboratory bench top for 40 minutes. At time t=0 minutes, the thermometer reads 17 degrees C. At time t=40 minutes, the thermometer reads 25 degrees C. Which statement correctly explains the cause of the temperature increase?
a)
The temperature of the water increased because it transferred energy to the surround air.
b)
The temperature of the water increased because the surrounding air transferred thermal energy to the water.
c)
The temperature of the water increased because the thermal energy of the water and air were equivalent.
d)
The temperature of the water increased because glass is a thermal insulator.
88.
The table below shows the chemical and physical properties of several materials. Which of the following materials is most similar to the materials in the table?
a)
iron (Fe)
b)
argon (Ar)
c)
Silver (Ag)
d)
Calcium (Ca)
89.
On scratch paper, draw the Punnett Square to predict the cross of a homozygous striped parent with a homozygous solid parent if striped is dominant over solid. The phenotypes of the offspring will be
a)
all striped
b)
all solid
c)
some striped and some solid
d)
neither striped or solid
90.
What is the the percentage of offspring that would be solid in the following scenario? The Punnett Square to predict the cross of a homozygous striped parent with a homozygous solid parent if striped is dominant over solid.
a)
25%
b)
50%
c)
75%
d)
100%
91.
What piece is missing from the chemical equation for cellular respiration?
a)
6H2
b)
6O2
c)
6C2
d)
6Cl2
92.
How did the Galapagos finches change to fit the new environment?
a)
All the finches in the population grew new and different beak shapes.
b)
Over many generations, the finches with beak shapes suited to their environment and food source survived.
c)
The finches chose to only produce offspring that looked different from themselves.
d)
The finches did not change to fit the new environment.
93.
Which has the following characteristics: metabolism, reproduction, homeostasis, growth, made of cells, adaptation and sensitivity?
a)
A
b)
B
94.
Jason needs to breathe. Without the organs in the image above, it would be impossible to do so. Which three parts of the diagram are labeled correctly? Select the correct answers. What part of the diagram is labeled W?
a)
aveolus
b)
lungs
c)
trachea
d)
diagram
95.

Complete the cellular hierarchy from smallest to largest. organs, organ system, organism, tissues, cells

(a)  

96.
Look at the image of the X-ray. Dr. Ware took an X-ray of a part of Randy's body. which system is Dr. Ware examining in the X-ray?
a)
digestive system
b)
skeletal system
c)
immune system
d)
nervous system
97.
The Asian walking catfish is positioned in the secondary level and the tertiary level because it is a(n)
a)
fish
b)
carnivore
c)
omnivore
d)
herbivore
98.

Write the correct order for the pyramid representing types of organisms occupying each level from bottom to top. primary consumers, top consumers, secondary consumers, producers

(a)  

99.
Two of the chemical equations represent chemical reactions involving the flow of energy through organisms. Which two equations represent flow through organisms?
a)
A
b)
B
c)
C
d)
D
100.
Consider the reactions cellular respiration and photosynthesis. Which statement is NOT true concerning those reactions?
a)
Photosynthesis converts solar energy into chemical energy.
b)
Sugar is a product of photosynthesis and a reactant in respiration.
c)
Photosynthesis is an endothermic reaction, and respiration is an exothermic reaction.
d)
Molecular oxygen is a reactant in photosynthesis and is a product of cellular respiration.
101.
In some fruit flies, the allele for having black eyes (B) is dominant to the allele for having red eyes (b). A scientist mated a batch of heterozygous fruit flies. Using the Punnett Squares which square would represent what the next generation would look like.
a)
A
b)
B
c)
C
d)
D
102.
In some fruit flies, the allele for having black eyes (B) is dominant to the allele for having red eyes (b). A scientist mated a batch of heterozygous fruit flies. According to the Punnett Squares below, ______ is the probability that the offspring will have red eyes.
a)
25%
b)
50%
c)
75%
d)
100%
103.
Leo's class studied the process of photosynthesis. Leo became interested in how altering light levels would affect plant growth. His teacher encouraged him to develop an investigation. Which description below could describe an investigation to determine how light affects plant growth?
a)
Grow bean seedlings in a drawer and on a window sill.
b)
Grow tomato seedlings in a greenhouse and in the garden.
c)
Grow radish seedlings in a cabinet and in a closet.
d)
All of the above
104.
Pitcher plant are plants that are commonly found growing in boggy, swamp-like conditions. The soils in swamps often lack many nutrients. A pitcher plant uses modified leaves to capture and digest insects. Insects are an additional source of nitrogen, phosphorous, and carbon. What type of adaptation are the modified leaves?
a)
chemical
b)
physical
c)
learned
d)
innate
105.
Select the correct answer. Which organism is not a consumer in this food web?
a)
grizzly bear
b)
wolf
c)
caribou
d)
lichen
106.
Which is the correct picture that represents a population?
a)
M
b)
P
c)
R
d)
S
107.
A group of student investigated how temperature affects the rate of chemical reactions. They used hydrogen peroxide, which breaks down into oxygen and water, for the investigation. The students measured how long it too to obtain 50 mL of oxygen gas from a given volume of hydrogen peroxide heated to different temperatures. Examine their data shown in the table below. Based on the students' data, select the correct conclusion about the rate of this chemical reaction.
a)
Reaction rates increase as time increases.
b)
Reaction rates decrease as time decreases.
c)
Reaction rates decrease as temperature increases
d)
Reaction rates increase as temperature increases.
108.
Which substance is best classified as a compound?
a)
N2
b)
O2
c)
H2O
d)
Al
109.
Determine the number of neutrons that most copper atoms contain.
a)
29
b)
35
c)
64
d)
128
110.
Which answer choice best describes the reactivity of the elements shown?
a)
highly reactive
b)
moderately reactive
c)
slightly reactive
d)
inert
111.
Which statement is not true about the relationship between nitrogen and phosphorus?
a)
Phosphorus has twice the neutrons of nitrogen.
b)
Phosphorus and nitrogen have similar reactivity.
c)
Phosphorus has twice the mass of nitrogen.
d)
Phosphorus and nitrogen are found in the same period on the Periodic Table.
112.
Look at the image below. Which answer represents the atomic mass?
a)
14
b)
Si
c)
Silicon
d)
28.09
113.
What is the group of least reactive elements called?
a)
halogens
b)
noble gases
c)
semiconductors
d)
metals
114.
Look at the image below. Which answer represents the atomic number?
a)
14
b)
Si
c)
Silicon
d)
28.09
115.
Where on the diagram are the least reactive elements located?
a)
Light Gray, Section A
b)
Dark Gray, Section B
c)
Black, Section C
d)
Textured, Section D
116.
Where on the diagram is the most reactive non-metals located?
a)
Section A
b)
Section B
c)
Section C
d)
Section D
117.
Ice, solid water, floats in liquid water because ice
a)
is less dense than water.
b)
is more dense than water
c)
evaporates in water.
d)
condenses in water.
118.
Crys leaves a cold soda on the kitchen counter and forgets it. After 3 hours, Crys remembers the soda and goes back to get it. When she touches the drink and the kitchen counter, she notices they are the same temperature. Select the correct answer. What happened?
a)
The soda and the kitchen counter are level.
b)
The kitchen counter is a good insulator.
c)
The soda and the kitchen counter are at thermal equilibrium.
d)
The soda melted on the kitchen counter.
119.
Look at the image. Select the correct answer. The structures represent the molecular structure of
a)
solids
b)
liquids
c)
gases
d)
plasma
120.
Look at the image. The images represent the difference between
a)

solids and liquids

b)

liquids and gases

c)

gases and plasma

d)

solids and gases

121.
Look at the image. What phase change is represented by arrow E?
a)
deposition
b)
condensation
c)
melting
d)
sublimination
122.
Look at the image. What phase change is represented by arrow F?
a)
deposition
b)
condensation
c)
melting
d)
sublimination
123.
Brett puts a pot of water on the stove. He puts a raw egg in the water and turns on the burner under the pot. After a few minutes, Brett notices bubbles appearing in a circular motion in the pot of water. Which choice describes the change in the state of matter happening when Brett observes the bubbles in the hot water?
a)
The water undergoes sublimination.
b)
The water boils
c)
The water undergoes deposition
d)
The water freezes
124.
When the bubbles appear in the hot water and the water moves, this is a sign of the transfer of thermal energy occurring. This transfer of thermal energy occurring within the pot of water above is called
a)
conduction
b)
radiation
c)
convection
d)
deposition
125.
Scientists investigated a case in which babies in Noname County were born with defects starting 2 years after a manufacturing plant in the area opened for operation. The smokestacks at the plant released smoke every day. Select the answer that is the most likely explanation for the birth defects.
a)
THe plant operated at the wrong time of day.
b)
The plant only hired people from Sequatchie County.
c)
The smoke stacks emitted toxic gases into the atmosphere which negatively affected humans.
d)
The smoke stacks were too tall and the smoke blocked the view of the Great Smoky Mountains.
126.
Every summer, since the plant opened for operation, the air was always hazy or foggy. It was difficult to see the Great Smoky Mountains anytime you looked out of your window. Select the correct answer. What is the most likely explanation for the daily summer haze?
a)
The fog from the Great Smoky Mountains rolled down into the Central Plain.
b)
Water vapor in the humid air mixed with the particles from the smoke creating smog.
c)
Large rain cluds covered most of Noname County, causing invisibility problems.
d)
It was a foggy day in London Town.
127.
In the chemical equation below, identify the boxed item.
a)
subscript
b)
coefficient
c)
reactant
d)
product
128.
In the chemical equation below, identify the circled items.
a)

subscript

b)

coefficient

c)

reactant

d)

product

129.
Water is a(n) ___________ in any of its states of matter.
a)
pure substance
b)
element
c)
diatomic molecule
d)
solute
e)
chemical bond
130.
Amy placed tapioca beads in her tea for a special treat. She observed the edible beads as they floated in the tea and swirled when she stirred the tea with her spoon. The beads did not dissolve in the tea. When Amy stirred the tea with her spoon, she observed a(n)
a)
solvent
b)
solute
c)
mixture
d)
solution
131.
Which substance is a compound?
a)
Ra
b)
Al
c)
HF
d)
Ni
132.
Rust forms by the reaction of iron with oxygen to produce iron oxide. An 88 g iron nail rusted. The rusted nail (iron oxide) has a mass of 102 g. Identify the mass of oxygen that reacted in rusting the nail.
a)
14 g
b)
88 g
c)
102 g
d)
200 g
133.
In class, Frank learned about the Periodic Table, which contains natural and human-made elements. He can identify tin and nickel by important pieces of information listed on the table. Which piece of information identifies atomic mass for Nickel?
a)
28
b)
Ni
c)
Nickel
d)
58.693
134.
In class, Frank learned about the Periodic Table, which contains natural and human-made elements. He can identify tin and nickel by important pieces of information listed on the table. Which piece of information identifies element symbol for Tin?
a)
50
b)
Sn
c)
Tin
d)
118.71
135.
**Select the correct answer. According to the graph, as the concentration of copper increases, what happens to the number of duckweed plants?
a)

It increases.

b)

It decreases

c)

It stays the same.

d)

It increases, then stays the same.

136.
Which two of the following statements are true?
a)
Energy decreases as water moves from gas to solid state.
b)
Energy increases as water moves from gas to a solid state.
c)
Energy decreases as water moves from solid to gas state.
d)
Energy increases as water moves from solid to gas state.
e)
Energy remains the same from solid to gas state.
137.
A scientific researcher was interested in determining the length of time it took to domesticate an animal. HE kept and bred over 300 wild silver foxes. He would select the tamest puppy from each litter to breed with another hand-picked tame puppy.
a)
cloning
b)
genetic engineering
c)
interbreeding
d)
selective breeding
138.
Select the correct answer. What is one main difference between respiration and photosynthesis?
a)
Photosynthesis makes energy, and respiration destroys energy.
b)
Photosynthesis stores energy, and respiration breaks down energy.
c)
Photosynthesis takes place in plant cells only, and respiration takes place in animal cells only.
d)
Photosynthesis uses inorganic chemicals to make energy, and respiration does not.
139.

Humans begin drilling for oil within a state park. Select the correct answer. Which population of organisms found within the park will be impacted the most?

a)

the tree population

b)

the caribou population

c)

the wolf population

d)

They will be equally impacted by the drilling.

140.
During photosynthesis and respiration, which nutrient is exchanged between plants and animals?
a)
oxygen
b)
water
c)
nitrogen
d)
phosphates
141.
If air pollution got really bad and blocked out all sunlight, what would eventually happen to organisms?
a)
Plants would die, but animals would survive by eating other animals.
b)
Plants would survive on inorganic chemicals, but animals would die.
c)
Plants and animals would survive without changing.
d)
Both plants and animals would die.
142.
The energy you need to live ultimately comes from
a)
the water cycle.
b)
the sun.
c)
meat.
d)
plants.
143.
A human blood cell was placed in an isotonic sugar solution and left overnight. What will most likely happen to the blood cell?
a)
Nothing
b)
It will swell and burst.
c)
It will shrivel and die.
d)
It will would swell then maintain that size.
144.

The graph below illustrates the variation in body length of a particular beetle species. If you randomly caught one of these beetles, what would you predict its body length to most likely be?

a)

2 cm

b)

8 cm

c)

12 cm

d)

22 cm

145.
**How does energy move among the mouse, hawk, and grass?
a)

grass-->hawk-->mouse

b)

hawk-->mouse-->grass

c)

mouse-->hawk-->grass

d)

grass-->mouse-->hawk

146.
Locate the answer that groups the correct type of cell with the correct type of cell division.
a)
Reproductive cells-->mitosis::somatic cells-->meiosis
b)
Reproductive cells-->meiosis::somatic cells-->mitosis
c)
Reproductive cells-->crossing over::somatic cells-->meiosis
d)
Somatic cells-->crossing over::reproductive cells-->mitosis
147.
Wiley the tadpole, transformed into Wiley, the frog, by means of metamorphosis. A part of metamorphosis is cell division. Why is cell division necessary for Wiley?
a)
Cell division replaces old cells and allows the organis to grow and reproduce.
b)
Cell division is not necessary for organisms.
c)
Cell division is only necessary for dieseased or stressed organisms.
d)
Cell division only occurs in somatic cells of an organism.
148.
A random variation in the coloration of peppered moths allowed the species to survive under changed environmental conditions. What caused the random variation in the moth population?
a)
genetic flowing
b)
selective breeding
c)
convergent evulution
d)
mutation
149.
On the Galapagos Islands many different species of iguana exist. Some iguanas are large, black, and eat food found in the ocean. Other iguanas are smaller, different colored, and eat food found on the island. What process most likely explains the differences seen in the iguana species?
a)
convergent evolution
b)
bottleneck
c)
natural selection
d)
artificial selection
150.
**Use the information and your scientific knowledge to answer the question. Over time, which group is most likely to survive to the third or fourth generations in the Arctic tundra?
a)
Group A
b)
Group B
c)
Group C
d)
Group D
151.
Group A: Heterozygous dominant rabbits for brown fur and homozygous recessive rabbits for white fur. Two rabbits leave group A and wander into the forest: a homozygous recessive female and a heterozygous dominant male. Brown fur is dominant over white fur. They have offspring. The rabbits that survive of the next generation all have brown fur. Some are homozygous dominant and some are heterozygous dominant. What is the probability of homozygous recessive offspring in the next generation.
a)
0%
b)
25%
c)
50%
d)
75%
152.
Which statement correctly describes the difference between an atom and a molecule?
a)
An atom consists of one or more molecules chemically joined together.
b)
An atom is the result of the physical separation of molecules.
c)
A molecule consists of one or more atoms chemically joined together.
d)
A molecule is one or more atoms physically joined together.
153.
Table sugar, also called glucose, has a formula of C6H12O6. What other term could be used to describe glucose?
a)
compound
b)
element
c)
proton
d)
mixture
154.
Which property matches the information listed below? 19 protons, 19 electrons and 20 neutrons
a)
physical property
b)
chemical property
c)
subatomic particle
d)
examples
155.
Which property matches the information listed below? found in bananas, the body and fertilizers
a)
physical property
b)
chemical property
c)
subatomic particle
d)
examples
156.
Fizzing, releasing gas, changing color, and warming up, are indications a __________ has occurred.
a)
change of the states of matter
b)
chemical reaction
c)
physical change
d)
phase change
157.
Which of the following cannot be found on the Periodic Table?
a)
aluminum chloride
b)
nitrogen
c)
titanium
d)
magnesium
158.
Which state of matter has the slowest particle motion resulting in the lowest amount of kinetic energy?
a)
solid
b)
liquid
c)
gas
d)
plasma
159.
A human liver cell contains 46 chromosomes. How many chromosomes are in a human sperm cell?
a)
93
b)
46
c)
23
d)
10
160.
An African elephant population has few members and reproduces once every 2-5 years. How would this elephant population survive in a suddenly changed environment?
a)
The elephant population would adapt quickly to the change and survive.
b)
The elephant population would not adapt quickly to the change; it could become endangered or extinct.
c)
The elephant population would not adapt at all to the change and would become extinct.
d)
The elephant population would adapt to the change by reproducing more quickly.
161.
Which fact would you use to contrast the processes of mitosis and meiosis?
a)
cell shape
b)
number of chromosomes
c)
make-up of the cell membrane
d)
activity level of chloroplasts
162.
How do producers get energy?
a)
They get it from biotic factors in an ecosystem.
b)
They get it from abiotic factors in the ecosystem.
c)
They get it from the decomposing organisms.
d)
They get it from humans.
163.
Jason's friend, Ralph, has Down Syndrome. This means Ralph has an extra chromosome 21. Ralph has a chromosomal mutation called
a)
deletion
b)
translocation
c)
duplication
d)
inversion
164.
In 1924, a farmer found zero Japanese honeysuckle plants in his field. In 1925, the farmer noticed 2 plants growing alongside his field. In 1926, the farmer counted 20 plants growing alongside his field. In 1927, the farmer found close to 200 plants growing alongside his field crowding out other plants. Which explanation below best describes why the plants grew and reproduced so quickly?
a)
The plants developed an adaptation that allowed them to thrive.
b)
The plants developed a symbiotic relationship with another organism.
c)
The plants were an invasive species native to Japan.
d)
The plants developed a new niche.
165.
Select two correct answers. One of the Drosophila fly offspring has shortened wings (ww). Shortened wings is a recessive mutation in fruit flies. What are the possible genotypes of both parents for wing length? Draw a Punnett Square to help you figure out the genotypes for wing length.
a)
Ww and Ww
b)
WW and ww
c)
Ww and WW
d)
Ww and ww
e)
WW and WW
166.
Select two correct answers. One of the Drosophila fly offspring has shortened wings (ww). Shortened wings is a recessive mutation in fruit flies. What are the genotypes of both parents for wing length?
a)

One parent is homozygous dominant and the other parent is homozygous recessive for wing length.

b)

One parent is heterozygous dominant and the other parent is homozygous recessive for wing length

c)

Both parents are heterozygous dominant for wing length

d)

Both parents are homozygous recessive for wing length.

167.

The temperature was decreased below the boiling point of each gas. Which diagram shows what would happen to the mixture?

a)

A

b)

B

c)

C

d)

D

168.
Subatomic particle that is positively charged, equal to the atomic number of an element, part of the nucleus of the atom
a)
Neutron
b)
Proton
c)
Electron
d)
Atom
169.
Subatomic particle that is neutral, equal to the atomic mass-atomic number, part of the nucleus of the atom
a)
Neutron
b)
Proton
c)
Electron
d)
Atom
170.
Subatomic particle that is negatively charged, equal to the atomic number, cloud makes up the volume of the atom
a)
Neutron
b)
Proton
c)
Electron
d)
Atom
171.
Number of protons and neutrons in the atom
a)
Mass Number
b)
Atomic Number
c)
Electrons
d)
Atoms
172.
Number of protons in the nucleus of an atom, identifies the element on the periodic table
a)
Mass Number
b)
Atomic Number
c)
Electrons
d)
Atoms
173.
ONE of 118 elements that cannot be broken down into simpler substances, represented by chemical symbols
a)
Element
b)
Compound
c)
Pure Substance
d)
Mixture
174.
Pure substances that is chemically combined by two or more elements
a)
Element
b)
Compound
c)
Pure substance
d)
Mixture
175.
Cannot be broken down into smaller parts through physical means (elements and compounds)
a)
Element
b)
Compound
c)
Pure Substance
d)
Mixture
176.
Combination of two or more substances that can be broken down into simpler substances by physical means
a)
Element
b)
Compound
c)
Pure Substance
d)
Mixture
177.
___________________are the building blocks of all matter.
a)
Atoms
b)
Molecules
c)
Elements
d)
Compounds
178.
Law of Conservation of MASS states that
a)
mass can be created or destroyed.
b)
mass cannot be created or destroyed
c)
mass can only be destroyed.
d)
mass can only be created.
179.

What cell organelle produces energy in animal cells?

a)

vacuole

b)

lysosome

c)

ribosome

d)

mitochondria

180.

Which phase occurs between the two phases shown?

a)

b)

c)

d)

181.
a)

A

b)

B

c)

C

d)

D

182.
a)

b)

c)

d)

183.

What is the BEST example of sexual reproduction?

a)

A new plant cell results from mitosis.

b)

Offspring receive genetic material from two parents.

c)

A bacterium divides into offspring identical to the parent.

d)

Daughter cells receive all the genetic material of a parent cell.

184.

What human activity GREATLY increases the amount of carbon dioxide that is released into the atmosphere?

a)

planting trees

b)

composting leaves

c)

draining wetlands

d)

burning coal

185.

Which statement accurately describes the relationship between photosynthesis and cellular respiration?

a)

Both processes produce water

b)

Both processes produce oxygen

c)

Carbon dioxide produced by respiration is needed for photosynthesis.

d)

Glucose is a reactant for photosynthesis and a product of respiration.

186.

The union of a sperm and an egg during the life cycle of a jellyfish is best described as

a)

sexual reproduction

b)

genetic inheritance

c)

asexual reproduction

d)

genetic engineering

187.
a)

A

b)

B

c)

C

d)

D

188.
a)

M

b)

P

c)

R

d)

S

189.
a)

M

b)

P

c)

R

d)

S

190.
a)

A

b)

B

c)

C

d)

D

191.

Which statement best explains this gas exchange?

a)

Animals produce oxygen that plants release

b)

Animals release carbon dioxide that plants use in photosynthesis

c)

Plants produce carbon dioxide that animals use to produce oxygen

d)

Plants release oxygen that animals use to produce chlorophyll

192.

Which sequence places the structures in order from least complex to most complex?

a)

1->2->4->3

b)

1->3->2->4

c)

2->1->3->4

d)

2->1->4->3

193.

Deer need producers and oxygen to provide energy and matter for their cells. What is the primary source of oxygen for the deer in this ecosystem?

a)

The oxygen is a product of photosynthesis by the insects.

b)

The oxygen is a product of photosynthesis by the grasses.

c)

The oxygen is a product of cellular respiration by the cougar.

d)

The oxygen is a product of cellular respiration by the grasses.

194.

Which of these is the most likely reason the algae are able to help two-toed sloths survive?

a)

by allowing the sloths to blend in with the trees to hide from predators

b)

by providing sloths with easy access to another food source

c)

by making sloths more attractive to other sloths to encourage mating

d)

by helping to keep the body temperatures of sloths cooler during hot weather

195.

In which situation would this process be beneficial to the cells?

a)

growth and repair, because it produces identical types of cells

b)

growth and repair, because it makes the cells of the organism larger

c)

reproduction, because it creates more energy for the organism

d)

reproduction, because it increases the number of chromosomes in the cells

196.
a)

M

b)

P

c)

R

d)

S

197.

Which statement correctly describes the probability that offspring of this cross will display certain traits?

a)

75% yellow pods and 25% green pods

b)

50% yellow pods and 50% green pods

c)

100% yellow pods

d)

100% green pods

198.

Based on the diagram and the periodic table, which two statements correctly describe a silicon atom?

a)

Electrons are not present in the nucleus of a silicon atom.

b)

There are 14 protons in the nucleus of a silicon atom.

c)

Silicon atoms have no electrons.

d)

A silicon atom should have 16 protons.

e)

There are equal numbers of protons and neutrons in a silicon atom with a mass number of 28.

199.

Which of these best identifies a pathway of systems in the rider's body, as described in this scenario?

a)

nervous system -* musculoskeletal system - circulatory system - nervous system

b)

nervous system -* musculoskeletal system - nervous system - musculoskeletal system

c)

musculoskeletal system -› nervous system -› circulatory system -› musculoskeletal system

d)

musculoskeletal system - circulatory system - musculoskeletal system - nervous system

200.

Based on the data collected, which statement is the best prediction of what the colors of the flowers will be on the new plants?

a)

There will be more red flowers than white flowers, because the red color is dominant over white.

b)

There will be more white flowers than red flowers, because the white color is dominant over red.

c)

There will be fewer red flowers than white flowers, because the red flower color is a recessive trait.

d)

There will be fewer white flowers than red flowers, because the white flower color is a dominant trait.

201.

Deer need producers and oxygen to provide energy and matter for their cells. What is the primary source of oxygen for the deer in this ecosystem?

a)

The oxygen is a product of photosynthesis by the insects.

b)

The oxygen is a product of photosynthesis by the grasses.

c)

The oxygen is a product of cellular respiration by the cougar.

d)

The oxygen is a product of cellular respiration by the grasses.

202.

A student was reading about the gases in air. Ozone helps protect Earth from harmful ultraviolet rays that come from the sun. Certain types of pollution created by humans have caused a hole in the ozone layer. This hole is over the South Pole and could become larger if this type of pollution increases.

Which question should the student ask to determine if ozone is an elemental molecule?

a)

What is the color of the molecule?

b)

What is the What is the shape of the molecule? of the molecule?

c)

What elements are present in the molecule?

d)

How many atoms are present in the molecule?

203.

Which of these describes a behavioral adaptation that will increase the probability that a species will survive?

a)

A bird has brown feathers that help it blend with the ground where its nest is located.

b)

A giraffe has long legs that help it reach leaves growing at the tops of acacia trees.

c)

A moth has large dark spots on its wings that resemble eyes and scare away predators.

d)

A mother bear stays with her cubs for a year and a half until they learn skills to live on their own.

204.

White-tailed deer are mammals. Mammals have a reproductive strategy that is not found in all animals.

Which two statements provide a cause and effect of the reproductive strategy of white-tailed deer that helps them survive?

a)

It requires two parents.

b)

It requires only one parent.

c)

It causes very fast growth and development.

d)

It produces genetic variation within a population.

205.

A student uses a microscope to observe a single-celled organism that can move. The organism contains a nucleus and many chloroplasts. Based on the observations, the student claims the organism is not a bacterium. which observation best supports the student's claim?

a)

The organism is unicellular.

b)

The organism is able to move.

c)

The organism has a nucleus.

d)

The organism performs photosynthesis.

206.

A scientist wants to know if female guppies prefer to mate with male guppies when the males are more colorful. She divides a fish tank in half using a glass divider. She then places a female guppy in one side of the tank and takes turns placing differently-colored male guppies in the other side. She observes the response the female has to each male guppy.

What is the dependent variable in this investigation?

a)

size of the male guppies

b)

color of the male guppies

c)

amount of time each male is in the tank

d)

female response to each male in the tank

207.

• Which statement best classifies air?

a)

Air is a pure substance because it is composed of pure substances.

b)

Air is a pure substance because its properties rarely change.

c)

Air is a mixture because it has the same properties at all times.

d)

Air is a mixture because its composition varies.

208.

Metals are commonly used in medical implants, but they have the disadvantage of tending to corrode. When a metal corrodes, the metal is worn away or gradually destroyed.

Which of these is the most likely solution for preventing metal corrosion when metal is used in the human body?

a)

Cover the metal in a nonreactive chemical.

b)

Allow the metal to form compounds with tissue.

c)

Increase the surface area of the metal.

d)

Allow the metal to absorb fluids from the body.

209.

Which statement does not describe a problem that causes some smaller cities to have poorer air quality than some larger cities?

a)

Smaller cities have less funding to spend fighting pollution.

b)

Smaller cities have fewer charging stations for electric cars.

c)

Smaller cities have shorter commutes to work.

d)

Smaller cities have less access to public transportation.

210.

Almonds are edible seeds that grow on trees. Wild almonds typically have a bitter taste caused by a chemical in the almond. If an organism eats wild almonds, a chemical reaction occurs that releases the bitter taste.

However, a genetic mutation in the almond tree can occur that prevents wild almonds from producing the bitter taste. Which statement describes how this type of mutation could affect these wild almond trees?

a)

This mutation could increase the population of wild almond trees.

b)

This mutation could increase the life span of wild almond trees.

c)

This mutation could decrease the size of wild almond trees.

d)

This mutation could decrease the rate of reproduction for wild almond trees.

211.

Which of these human activities has the most positive effect on the biosphere?

a)

inviting tourists to beaches

b)

building artificial coral reefs

c)

constructing hydroelectric dams

d)

clear-cutting forests for agriculture

212.

Scientists used genes from corn and a soil microorganism to produce beta-carotene in rice grains to make golden rice. Beta-carotene is a relative of vitamin A. Golden rice can be grown in countries where vitamin A deficiency is widespread.

Which statement best describes the cause of the genetic changes that these crops experienced?

a)

Mutations occur after the gene transfer that are beneficial and produce desirable traits.

b)

Transferring genes from one organism to another has led to the production of beneficial traits.

c)

The removal of nonbeneficial genes has allowed for the expression of only beneficial traits.

d)

Natural selection acts on the existing genes in a species to produce beneficial traits.

213.

Which two claims about cell function are supported by the evidence in the diagram?

a)

Both types of cells are unable to produce energy.

b)

Both types of cells can maintain a rigid shape.

c)

Both types of cells can control what enters and exits the cell.

d)

P. Both types of cells produce proteins.

214.

Which of these cell functions is most likely being modeled?

a)

energy production by the mitochondria

b)

passive transport across the cell membrane

c)

photosynthesis inside the chloroplast

d)

mitosis in the nucleus

215.

The drawing illustrates which two levels of biological organization?

a)

cell

b)

tissue

c)

organism

d)

organ system

216.

The student describes particles on the edge of the atom. Which statement supports the student's claim that the particles on the edge of the atom do not move away from the center?

a)

The particles are connected to the center by an object similar to a rope.

b)

The particles are held in place because atoms are a solid structure.

c)

The particles are attracted to the center because they have a charge opposite to the center's charge.

d)

The particles are pushed toward the center by the nuclear charges of other atoms.

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