#9 Keystone Review-Interdependent Relat. (STEELS Area #9)

Which of the following best describes the fundamental difference between a food chain and a food web?

• A. A food chain shows energy flow in an aquatic ecosystem, while a food web shows energy flow in a terrestrial ecosystem.

• B. A food chain is a single, direct path of energy flow, while a food web shows multiple, interconnected feeding relationships.

• C. A food chain includes producers and consumers, while a food web includes only consumers.

• D. A food chain only includes three trophic levels, while a food web includes all five trophic levels.

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NGSS.MS-LS2-3

Which of the following organisms represents a producer in an ecosystem?

• A lion, which eats zebras.

• A mushroom, which breaks down dead matter.

• A rose bush, which makes its own food using sunlight.

• A snake, which eats mice.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What is the main source of energy for nearly all food chains on Earth?

• Chemical energy from hydrothermal vents.

• Thermal energy from the Earth's core.

• Light energy from the Sun.

• Mechanical energy from wind.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

In a typical food web, a rabbit that eats grass would be classified at which trophic level?

• Primary producer

• Primary consumer

• Secondary consumer

• Tertiary consumer

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NGSS.MS-LS2-3

An organism that obtains its energy by eating both primary consumers and secondary consumers is classified at which trophic level?

• Primary consumer

• Secondary consumer

• Tertiary consumer

• Quaternary consumer

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NGSS.MS-LS2-3

A hawk that eats a snake, which had previously eaten a mouse, is acting as which type of consumer?

• Primary consumer

• Secondary consumer

• Tertiary consumer

• Quaternary consumer

According to the principle of conservation of energy, what happens to the energy that is not transferred to the next trophic level when one organism eats another?

• It is destroyed and lost from the ecosystem.

• It is recycled back to the producers.

• It is transformed, primarily as heat, or used for the organism's life processes.

• It accumulates in the surrounding abiotic factors like water and soil.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Approximately what percentage of energy is typically transferred from one trophic level to the next in an ecosystem?

• 90%

• 50%

• 10%

• 1%

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What term describes the maximum population size of a species that an environment can sustain indefinitely, given the available resources?

• Limiting factor

• Trophic level

• Carrying capacity

• Biotic potential

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NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which of the following is an example of a limiting factor that would decrease the carrying capacity for a deer population in a forest ecosystem?

• An increase in the number of trees and plants for food.

• A decrease in the number of wolves (predators).

• A severe, multi-year drought that dries up all available water sources.

• The deer population is very small and spread out.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1