Spurlock-Chapter 7 Unit Assessment

In a forest ecosystem, a food chain might look like this: green plants → rabbit → coyote → mountain lion. If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?

• Most mountain lions will leave the area.

• Rabbits will obtain their energy from coyotes.

• There will be fewer rabbits for coyotes to eat.

• There will be more coyotes for mountain lions to eat.

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NGSS.MS-LS2-1

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As members of a food web, humans are considered to be

• producers

• consumers

• decomposers

• scavengers

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The boxes in the diagrams below represent the different levels in an ecosystem. The size of each box represents the relative number of organisms at each level. The bottom level in each diagram represents primary producers. Which diagram BEST models the flow of energy in an ecosystem?

• A

• B

• C

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What would happen if the frogs were suddenly removed from the food chain?

• A. The grasshopper population would increase.

• B. The snake population would begin feeding on grasshoppers.

• C. The owl population would increase.

• D. The clover population would be unaffected.

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Within a cave environment, bat waste products, called guano, are decomposed by organisms such as fungi and bacteria. These are then eaten by creatures such as flatworms. Larger animals like salamanders eat flatworms. Which correctly represents the energy flow described?

• Fungi → Bacteria → Salamanders → Guano

• Bats → Guano → Flatworms → Salamanders

• Salamanders → Fungi → Bacteria → Flatworms

• Guano → Bacteria → Flatworms → Salamanders

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NGSS.MS-LS2-3

Which of these dark ecosystems use energy originally obtained from the Sun?

• A. whale fall, black smoker, deep cave

• B. black smoker, deep cave, cold seep

• C. whale fall, cold seep, deep cave

• D. black smoker, whale fall, cold seep

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NGSS.MS-LS2-3

In a food chain, energy is passed from one organism to another. Wheat → Mouse → Snake → Owl. Which organism in this food chain has the MOST available energy?

• wheat

• mouse

• snake

• owl

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NGSS.MS-LS1-6

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An ocean food chain is shown. Phytoplankton → Krill → Fish → Sea Lions. Which organism gets its energy directly from the Sun?

• phytoplankton

• krill

• fish

• sea lions

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NGSS.MS-LS1-6

Which BEST describes the effect on another population in the food web below if nearly all of the field mice are removed?

• The number of lynx will increase.

• The amount of grass will decrease.

• The amount of seeds will increase.

• The number of ferrets will decrease.

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In an energy pyramid, the total energy available for consumption from one trophic level to the next one above it is

• A. reduced.

• B. conserved.

• C. multiplied.

• D. evenly distributed.

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NGSS.MS-LS1-6

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