7th Grade Science
Formative Assessment #11
Multiple Choice
Directions: Identify the choice that best completes the statement or answers the question.
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1. Which diagram correctly models the movement of carbon in a food web? (caribou is also
called a ‘reindeer’)
A.
B.
C.
D.
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2. The table below shows three carbon cycle processes.
How do all three of the processes listed in the table affect another geochemical cycle?
A.
B.
C.
D.
They affect the water cycle by adding water to the atmosphere.
They affect the carbon cycle by adding carbon to the atmosphere.
They affect the water cycle by removing water from the atmosphere.
They affect the carbon cycle by removing carbon from the atmosphere.
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3. The diagram below shows part of the carbon cycle. Use the diagram to answer the following
question(s).
X
Each arrow represents a process in the cycle. Which of the following best describes the
process that occurs at arrow ‘X’?
A.
B.
C.
D.
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.
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4. This diagram shows the flow of carbon in a terrestrial ecosystem.
Which will most likely happen if the decomposers are removed from the carbon cycle?
A.
B.
C.
D.
The amount of carbon dioxide in the atmosphere will increase.
The amount of carbon dioxide in the atmosphere will decrease.
The amount of carbon dioxide used by producers will increase.
The amount of carbon dioxide needed by consumers will decrease.
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5. Which statement best describes the roles of photosynthesis and respiration in the carbon
cycle?
A. Respiration and photosynthesis both add carbon to the atmosphere.
B. Respiration and photosynthesis both remove carbon from the atmosphere.
C. Respiration adds carbon to the atmosphere, while photosynthesis removes carbon from
the atmosphere.
D. Photosynthesis adds carbon to the atmosphere while respiration removes carbon from the
atmosphere.
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6. Researchers studied a typical hardwood forest containing a variety of trees, other plant
species, fungi, and animals. The atmospheric carbon dioxide concentrations around the
forest were measured in the middle of the day. The carbon dioxide concentration was lowest
right next to the forest and steadily increased as the researchers measured farther away from
the forest. Explain how this observation supports the Law of Conservation of Mass.
A. The carbon released by animals through cellular respiration is used by the trees to create
food necessary for growth and maintenance.
B. The carbon released into the atmosphere by decaying organic matter is increases as you
move further away from the forest.
C. The carbon released by plants through photosynthesis is quickly cycled through the
cellular respiration of animals.
D. The amount of carbon burned by fossil fuels decreases further away from the forest.
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7. The diagram below is a pyramid showing the amount of energy transferred between each
level of a food web. Each level receives approximately 10% of the energy from the level
below.
Which of the following statements best explains the difference in the amount of energy available
at each trophic level?
A.
B.
C.
D.
Producers pass 90% of the energy from sunlight to the next level.
Higher trophic levels contain 90% more organisms than lower levels.
Life functions at each trophic level consume 90% of the remaining energy.
Organisms in lower trophic levels digest food 90% faster than those in the middle levels.
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8. A student picked up Ball A off a shelf and threw it. In this action light energy from the sun
is transformed into chemical energy through photosynthesis in food. The chemical energy
stored in the student was transformed into mechanical energy as he/she used her muscles to
throw the ball. How does this action support the Law of Conservation of Energy?
A. Energy was conserved because different forms of energy were created at various stages in
the process.
B. Energy was conserved because the light energy was transformed into various forms in the
process.
C. Energy was not conserved because the light energy from the sun was destroyed as the
chemical energy was gained through eating.
D. Energy was not conserved in this example because the light energy is no longer available.
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9. Which of the following explains why elements, such as carbon and oxygen, that are used in
organic molecules are not permanently removed from the environment?
A.
B.
C.
D.
They are replenished by sunlight.
They are cycled through ecosystems.
They are replaced by volcanic eruptions.
They are produced constantly from nutrients.
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10. Plants absorb solar energy during photosynthesis. The graph below represents how this
energy is distributed in some plants.
Which of the following statements best describes what happens to the energy represented by
the section labeled ‘X’?
A.
B.
C.
D.
It is recycled to the Sun.
It is consumed by decomposers.
It is lost to the soil and atmosphere.
It is used for cellular respiration and maintenance.
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7th Grade Science Formative Assessment #11 Answer Key
Correct
Answer
Answer
Benchmark
1.
A
2.
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B
3
3
3.
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A
3
4.
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B
3
5.
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C
3
6.
7.
8.
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A
C
B
3
9.
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B
3
10.
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D
3
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DOK
3
3
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