Worksheets7th Science End of the Year
Total questions: 65
Worksheet time: 34mins
Name
Class
Date
1.
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
2.
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
3.
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
4.
Which organism shown in the image is a producer?
a)
deer
b)
grass
c)
buzzard
d)
All the organisms are producers.
5.
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
6.
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
7.
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.
8.
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.
9.
The image shows an example of a(n) ___________________.
a)
food chain
b)
food web
c)
energy pyramid
d)
trophic level
10.
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
11.
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
12.
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
13.
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
14.
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
15.
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.
16.
Which substance is an element?
a)
NaCl
b)
Mg
c)
KBr
d)
CH4
17.
Which substance is a compound?
a)
Cl
b)
KCl
c)
Na
d)
Br
18.
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.
19.
What piece is missing from the chemical equation for cellular respiration?
a)
6H2
b)
6O2
c)
6C2
d)
6Cl2
20.
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
21.
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)
22.
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.
23.
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
24.
Select the correct answer. Which organism is not a consumer in this food web?
a)
grizzly bear
b)
wolf
c)
caribou
d)
lichen
25.
Which is the correct picture that represents a population?
a)
M
b)
P
c)
R
d)
S
26.
Determine the number of neutrons that most copper atoms contain.
a)
29
b)
35
c)
64
d)
128
27.
Look at the image below. Which answer represents the atomic mass?
a)
14
b)
Si
c)
Silicon
d)
28.09
28.
Look at the image below. Which answer represents the atomic number?
a)
14
b)
Si
c)
Silicon
d)
28.09
29.
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.
30.
Look at the image. Select the correct answer. The structures represent the molecular structure of
a)
solids
b)
liquids
c)
gases
d)
plasma
31.
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
32.
Look at the image. What phase change is represented by arrow E?
a)
deposition
b)
condensation
c)
melting
d)
sublimination
33.
Look at the image. What phase change is represented by arrow F?
a)
deposition
b)
condensation
c)
melting
d)
sublimination
34.
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
35.
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
36.
In the chemical equation below, identify the boxed item.
a)
subscript
b)
coefficient
c)
reactant
d)
product
37.
In the chemical equation below, identify the circled items.
a)
subscript
b)
coefficient
c)
reactant
d)
product
38.
Water is a(n) ___________ in any of its states of matter.
a)
pure substance
b)
element
c)
diatomic molecule
d)
solute
e)
chemical bond
39.
**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.
40.
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.
41.
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.
42.
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.
43.
During photosynthesis and respiration, which nutrient is exchanged between plants and animals?
a)
oxygen
b)
water
c)
nitrogen
d)
phosphates
44.
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.
45.
The energy you need to live ultimately comes from
a)
the water cycle.
b)
the sun.
c)
meat.
d)
plants.
46.
**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
47.
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.
48.
___________________are the building blocks of all matter.
a)
Atoms
b)
Molecules
c)
Elements
d)
Compounds
49.
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.
50.
What is true of tectonic plates?
a)
They are constantly moving
b)
Earthquakes cause them to move
c)
They don't move for centuries at a time
d)
There are fewer and fewer of them
51.
Tectonic plates move due to ________.
a)
the moon
b)
tsunamis
c)
heated currents deep within Earth
d)
the formation of mountains over time
52.
What plate boundary is shown here
a)
divergent boundary
b)
convergent boundary
c)
transform boundary
53.
What plate boundary is shown here
a)
divergent boundary
b)
convergent boundary
c)
transform boundary
54.
What plate boundary is shown here
a)
divergent boundary
b)
convergent boundary
c)
transform boundary
55.
Sea-floor spreading explains how.....
a)
new crust is created at a divergent boundary
b)
volcanoes are formed on continents
c)
deep sea trenches are formed
56.
What is FALSE about the age pattern on the seafloor in the Atlantic Ocean?
a)
The pattern is symmetrical on each side of the Mid-Atlantic ridge
b)
The oldest seafloor can be found farther away from the center of the ridge
c)
The youngest seafloor can be found farther away from the center of the ridge
d)
Seafloor near the Mid-Atlantic ridge is younger in age
57.
Who first proposed the theory of continental drift'?
a)
Galileo
b)
Wegener
c)
Hess
58.
What evidence did Wegener use in his theory of continental drift?
a)
Continents and fossils fitting together/matching-up like puzzle pieces
b)
glacier scars and evidence from temperature
c)
mountain ranges and coal deposits line up across continents
d)
all of the above
59.
Which evidence supports the Theory of continental drift.
a)
Fossils of tropical plants found under the snow and ice of Antarctica
b)
Fossils of the same land animal are found thousands of miles apart, on different continents
c)
Finding marine fossils on mountain tops
d)
All of the above
60.
A common synthetic material that is found almost everywhere is ________.
a)
Coal
b)
Lumber
c)
Plastic
d)
Aerogel
61.
Failing to recycle plastics can lead to _________.
a)
renewable materials
b)
pollution
c)
extra bottles around the house
d)
new materials
62.
A natural hazard occurs when natural physical processes become...
a)
dormant and inactive.
b)
extreme and unpredictable.
c)
scary!
d)
faster than usual.
63.
Which of the following statements about natural hazards is NOT true?
a)
Hazards are natural processes that CAN be dangerous, but have not yet caused damage.
b)
Hazards become disasters when they harm many people.
c)
Some hazards can be predicted, but usually can't be stopped.
d)
Hazards are natural processes that harm people on a regular basis.
64.
One region of the world that is very exposed to volcanoes, tsunamis, and earthquakes is...
a)
the Ring of Fire.
b)
the North and South Pole.
c)
the United States.
d)
Eastern Europe.
65.
The wearing away of rock by rock particles carried by water, ice, wind, or gravity.
a)
freezing and thawing
b)
relief of pressure
c)
erosion
d)
acid rain
100 %
