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WorksheetsScience Midterm Review
Total questions: 158
Worksheet time: 3hrs 58mins
A balanced chemical reaction obeys the law of
ideal gases
definite proportions
conservation of matter
conservation of energy
Students use a balance to determine the mass of a marble is 7.5 grams. A graduated bottle contains 10.0 milliliters of water. When the marble is carefully lowered into the graduated bottle and is completely covered with water the volume of the water containing the marble has increased to 12.5 milliliters. Find the density of the marble.
0.3 g/ml
3.0 g/ml
7.5 g/ml
12.5 g/ml
On Halloween, you take a glow stick, crack the capsule inside and shake it until it glows. This is an example of light energy being created from ___________________ energy.
chemical
mechanical
solution
thermal
According to the pH chart, which is the strongest base?
HCl
NaOH
blood
saliva
Why might a scientist repeat an experiment if she did not make a mistake in the first one?
Scientists who repeat experiments make the most money.
It helps ensure the results are consistent and repeatable.
Repeating ensures the expected results match the hypothesis.
It helps find portions that can be skipped with the same results.
Why might a scientist repeat an experiment if he/she did not make a mistake in the first one? An experiment should be repeated to
increase income for increased work.
prove how interesting the study was.
ensure the results are accurate.
eliminate steps and save time.
Beryllium has a nucleus composed of protons and neutrons. Given the data, how many neutrons are in a typical Beryllium nucleus?
3
4
5
9
Which statement is accurate for these two subatomic particles: protons and neutrons
They both have a neutral charge.
They both have a positive charge.
They are both located in the nucleus.
They are both located outside the nucleus.
Describe the structure of an atom.
The nucleus is the dense center of the atom composed of protons and neutrons. Surrounding the nucleus is an electron cloud composed of electrons.
The nucleus is the dense center of the atom composed of electrons and neutrons. Surrounding the nucleus is an electron cloud composed of protons.
The electron cloud is the dense center of the atom composed of electrons. Surrounding the electron cloud is a nucleus composed of protons and neutrons.
The electron cloud is the dense center of the atom composed of protons and neutrons. Surrounding the electron cloud is a nucleus composed of electrons.
Lemon Juice
Tums (antacid)
Water
Put all of the above household items in order from lowest to highest pH.
Lemon juice, water, Tums
Water, Tums, Lemon Juice
Water, Lemon Juice, Tums
Tums, water, lemon juice
Which of the following is a metalloid?
Be
B
C
N
Where are the nonmetals mostly located?
upper left corner
upper right corner
In the middle
lower left corner
The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?
they are not reactive
they are very reactive
they react with oxygen
they react with water
Lithium, sodium, and potassium are example of __________
nonmetals
alkali metals
transition metals
noble gases
What can you predict about elements in the same family(group)?
they are all about the same mass
they are chemically reactive in a similar way
the size of the atom decreases as you go down the column
Which word or group of words is represented by the word "period" in the term Periodic Table?
Group
Family
Energy Level
Valance Electrons
Which is a physical property of matter?
corrosion
flammability
oxidation or rusting
volume
Using the Law of Conservation of Matter, determine the number of grams of iron sulfide (FeS) that will be produced in this reaction.
112g Fe + 64g S → _____ g FeS
48 grams
64 grams
112 grams
176 grams
Which of these would have the greatest potential energy?
A roller coaster at the top of a hill.
A roller coaster half-way up the hill
A roller coaster half-way down the hill.
A roller coaster at the bottom of the hill.
What would happen to a 10 kg block of ice if you slowly increased the kinetic energy of the molecules within the ice?
The ice would melt.
Sublimation would occur.
The ice would remain frozen.
Water vapor near the ice would also freeze.
What is the energy transformation that is taking place from the batteries to the flashlight when it is on?
heat to magnetic to light
chemical to magnetic to light
chemical to electrical to light
mechanical to electrical to light
Which is an example of a mixture made of parts that can easily be separated?
Cake (Flour, eggs, sugar)
Cement(Sand, gravel, water)
Water (Hydrogen and oxygen)
Snack mix (Nuts, pretzels, and chips)
Which of these represents a chemical change?
two compounds combining to form a mixture
a mixture being separated into two elements
a compound being separated into two elements
an element changing state from solid to liquid
Which of these is common to all chemical changes?
A change of state occurs
A change of color occurs.
A new substance is produced.
Heat is released into the air.
Extensively tested and generally accepted : uncertain explanation for an observation
hypothesis : theory
theory : hypothesis
observation : theory
observation :hypothesis
What happens when liquid water is heated?
The water will freeze making ice.
The water will evaporate creating ice.
The water will evaporate creating steam.
The water will melt and remain liquid water.
The rock on the top of the pile has the greatest ___________ potential energy compared to all the other rocks.
falling
elastic
chemical
gravitational
During science class, while studying mixtures, you mix together table salt and sand. Your teacher challenges you to separate the salt from the sand. What property could you use and how would you use it?
solubility; Add water to the mixture and dissolve the salt
density; The two will form two layers. Scoop out the top layer.
color; Pick out one of the two solids by using color to guide you.
particle size; Pour the mixture through a paper filter to separate the two.
During science class, while studying mixtures, you mix together iron filings and sand. Your teacher challenges you to separate the sand from the iron filings. How could you use the physical properties of matter to practically separate the two solids?
Add water to the mixture and dissolve the sand.
Pick out one of the two solids by using color to guide you.
Pour the mixture through a paper filter to separate the two.
Use a magnet to pull out the iron filings as they are attracted to a magnet.
What is the MAIN reason water from the oceans turns to water vapor, and then evaporates into the air?
ocean breezes
changing tides
heat from the sun
moon's gravitational pull
The pH scale runs from 0 to 14, and is an indication of how acidic or basic a solution is. A pH close to zero indicates a(n) _______ solution, and a pH near 14 indicates a(n) _______ solution.
acidic; basic
basic; acidic
neutral; basic
acidic; neutral
Which statement about atomic structure is incorrect?
Protons are located in the nucleus
Protons and electrons have the same mass.
Protons and electrons have opposite charges.
Neutral atoms contain the same number of protons and electrons
What property of matter would be measured with this piece of equipment?
The mass of an apple.
The temperature of a room.
The volume of water in a glass.
The length of a piece of string.
Mrs. Smith is demonstrating a chemical change for her class. She places 15 grams of baking soda into a beaker. Next she adds 15 grams of vinegar to the same beaker. When the two compounds make contact, they bubble and fizz a great deal. She places the beaker on the balance and notes that the mass of the solution in the beaker is less than the expected 30 grams. Why is the mass of the solution in the beaker less than 30 grams?
The balance was not working correctly.
The gas that was released changed the mass.
Mass is always lost in a chemical reaction.
The new products have less mass than the original reactants.
Which of these is NOT considered a pure substance?
An atom
A mixture
An element
A compound
Why is science open to change?
Scientist are smarter now
Scientific explanations can change with new evidence.
Technology does not provide accurate scientific explanations.
New scientific explanations are always better than old explanations
If you go outside on a hot summer day with a double scoop ice cream cone, how will the cold ice cream interact with the hot outside air?
Heat from the ice cream will move to the air.
Cold from the ice cream will move to the air.
Cold from the air will move to the ice cream.
Heat from the air will move to the ice cream.
Temperature change affects the rate of a chemical reaction by changing the __________ of the colliding particle.
charge
concentration
size
speed
Trail mix is just that - a mix. Or in science terms, it is a mixture. One way you can tell this is a mixture is that you can
eat all the parts
measure the amounts of the parts
separate the parts by their properties
identify the parts that make up the mixture
Will and Marisa were studying about forces in science. They learned that gravity is a force; a force that pulls on us and keeps us from floating off into space! They wanted to learn more about forces so they built the device you see here. It is a spring hanging free from a support. There is a hook at the end of the spring and to that hook the children can add weights. Will and Marisa conducted their first test. They added weights, 10 Newtons at a time, to the spring. Describe the relationship between the weight added and the force of gravity.
Weight and the force of gravity are the same.
As each weight is added, the spring stretches more.
As weight increases, the force of gravity decreases.
As weight is added, the force of gravity increases.
In which situation is mechanical energy converted to electrical energy?
boiling water
using an iron
the sun shining
using a generator
What part of the scientific method is this an example of?
which of the following does NOT belong in the electromagnetic spectrum:
X-ray
sound wave
ultra violet rays
microwaves
What would happen to the bird if the green fish died out?
the bird population would grow
the bird population would die out
the smaller fish will die out
A student conducts an experiment to find out if the amount of light a plant receives affects its growth. One plant is placed under a dim light and another plant is placed under a bright light.
Which would be the BEST hypothesis for this experiment?
If plants are placed in direct sunlight, then they will grow more green leaves.
If plants are places in bright light, then they will grow more green leaves than in dim light.
If plants are place in clay pots, then they will grow more green leaves than plastic pots.
If plants are placed under bright light, then the temperature of the plants will increase.
Jackie sets up an investigation to find out how many paperclips she can pick up with an electromagnet. She takes a long iron nail, wraps insulated wire around it 40 times, and connects the wire ends to the opposite terminals of a D-cell battery.
Jackie touches the tip of the nail to a pile of 100 paperclips and picks up 15 of them. She tries the investigation again and picks up 15 paperclips. Jackie concludes that her electromagnet can pick up 15 paperclips. What should Jackie do to improve her investigation?
Jackie should use a regular magnet and not an electromagnet.
Jackie should use a different type of battery.
Jackie should do more trials to make sure her results are valid.
Jackie should begin with more than 100 paperclips.
When an atom ___ an electron it becomes a positive ion
gains
looses
sells
makes
In a plant cell, a stiff wall surrounds the membrane, giving the cell a rigid, boxlike shape?
cell membrane
cell
ribosome
cell wall
In order to maintain homeostasis, the systems of the human body work together to keep a constant internal temperature. Which of the following statements describes how the human body responds in a cold environment?
The nervous system moves the jaw bones and causes the chattering of teeth
The nervous system signals the muscles of the muscular system to contract and warm the body
The circulatory system delivers less carbon dioxide to the muscular system, resulting in stiffening of the muscles
The skeletal system produces more blood cells that circulate through the blood vessels, increasing the warmth of the body
Which of the following statements describe how these organisms are an example of cell theory?
The organisms have cells that lack a nucleus
The organisms are made of one or more cells
The cells of the organisms undergo photosynthesis
The cells of the organisms are identical to each other
Mr. Roberts drives his car away from his house at a constant speed. Which of the following graphs best shows the relationship between the distance traveled and the time spent driving?
Plant cells are different from animal cells. The diagram below identifies four different structures in a plant cell. Compared to the structures in an animal cell, which of the following structures is found only in a plant cell?
Mitochondrion
Cell Wall
Cytoplasm
Nucleus
Structures in the human body work together to perform specific functions. The diagram below shows the organization of structures found in the human body. A picture of which of the following structures belongs in the box above?
Cell
Organ
Organelle
Tissue
Mushrooms, bread molds, and yeasts are classified together in the fungi kingdom. Specific characteristics are used to classify these organisms. Which of the following is a characteristic used to classify these organisms as fungi?
They are parasites
They are unicellular
They are prokaryotes
They are heterotrophs
A certain reptile species is a herbivore and exists only on an isolated island. Which of the following would most likely result in the extinction of the reptile species over a period of twenty thousand years?
The reptile species produces many offspring with many unique traits, and the vegetation remains constant.
The reptile species produces few offspring with some unique traits, and the vegetation remains constant.
The reptile species produces few offspring with no unique traits, and the vegetation changes quickly.
The reptile species produces many offspring with some unique traits, and the vegetation changes slowly.
The gene for curled ears (C) is dominant over the gene for straight ears (c). The picture below shows a cat with curled ears (Cc) and a cat with straight ears (cc). What percent of the offspring are expected to have curled ears as a result of a cross between the cats shown?
100
75
50
25
Mangrove trees are common to the Florida Everglades. The tree roots serve as a place for freshwater oysters to attach when the tide is high, as shown in the picture below. The oysters are protected from predators when attached to the roots underwater. The oysters do not harm the trees nor do they provide any benefit to the trees. Which of the following relationships is most similar to the relationship between the mangrove trees and the oysters?
African ants living in acacia trees feed on leaf-eating insects found on the tree.
Spider crabs are camouflaged by the green-brown algae growing on their shells.
A whale is unaffected by the attached remora fish feeding on the whale’s leftover food.
Bees fly from one flowering plant to another gathering nectar and pollinating the flowers.
A diagram of the carbon cycle is shown below.Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow X?
Bacteria break down molecules in animals into carbon-based soil nutrients.
Animals release oxygen that is used by bacteria to produce carbon dioxide.
Animals release carbon dioxide that is used by bacteria for growth and reproduction.
Bacteria combine carbon-based nutrients from plants and animals to produce glucose.
In humans, brown eyes are dominant to blue eyes. Gloria has brown eyes and her two sisters both have blue blue eyes. If the allele for brown eyes is (B) and the allele for blue eyes is (b), which of the following could be the genotypes of Gloria's parents?
BB & Bb
Bb & bb
bb & bb
BB & BB
Food webs show feeding relationships among different types of organisms. Those organisms each have a specific niche. Which of the following best describes a function of decomposers in food webs?
to recycle nutrients into soil
to convert solar energy into food
to provide food for secondary consumers
to compete with secondary consumers for oxygen
