Food Webs and Energy

Which statement provides the best explanation for the difference in number of organisms found at each trophic level?

• Organisms at higher trophic levels have less energy available to them than organisms at lower trophic levels.

• Organisms at higher trophic levels require smaller habitats than organisms at lower trophic levels.

• Organisms at lower trophic levels provide less energy than organisms at higher trophic levels.

• Organisms at lower trophic levels outcompete organisms at higher trophic levels.

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

When constructing an energy pyramid of a swamp ecosystem, which of these would be placed at the top of the pyramid.

• Grass carp

• American Alligator

• Eastern mud turtle

• Great blue heron

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Based on this food web, which organisms are direct sources of energy for secondary consumers?

• aphid, bird, rabbit

• ladybug, fox, dragonfly

• frog, butterfly, berries

• mouse, snake, hawk

Tags

NGSS.MS-LS2-3

Based on the energy flow between trophic levels in an energy pyramid, how much energy would be expected to be found at the secondary consumer level in this energy pyramid?

• 100 Joules

• 500 Joules

• 1,000 Joules

• 50 Joules

Tags

NGSS.MS-LS2-3

Which organisms are both secondary and tertiary consumers?

• chemosynthetic bacteria and amphipods

• zooplankton and muscles

• ratfish and octopuses

• galatheid crabs and zoarcid fish

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NGSS.MS-LS2-2

What is lost to the environment at each trophic level?

• food sources

• living space for the organisms

• nutrients from soil

• heat

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following best describes the role of producers in an energy pyramid?

• They convert solar energy into chemical energy for other organisms.

• They consume primary consumers for energy.

• They recycle nutrients from dead organisms.

• They store energy as heat in the environment.

Tags

NGSS.MS-LS2-3

What is the primary reason energy decreases as it moves up an energy pyramid?

• Energy is used for life processes and lost as heat at each level.

• Producers absorb less energy than consumers.

• Decomposers consume all available energy.

• Energy is created at higher trophic levels.

Tags

NGSS.MS-LS2-3

In a grassland energy pyramid, which organism would most likely be found at the base?

• Mouse

• Hawk

• Snake

• Grass

Tags

NGSS.MS-LS2-3