Flow of Energy and Recycling of Matter Sustains Ecosystems

Which population of organisms would contain the greatest amount of biomass based on the food chain shown?

• Algae

• Zooplankton

• Perch

• Hawk

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which population of organisms would contain the least amount of biomass based on the food chain shown?

• Plants

• Insects

• Lizards

• Snakes

Tags

NGSS.MS-LS2-3

Which of the following statements about the biomass of each trophic level is accurate based on the food chain shown?

• The plant community has less biomass than the mosquito larvae population.

• The population of dragonfly larvae has more biomass than the mosquito larvae population.

• The beetle population has a lower biomass than the dragonfly larvae population.

• The population of beetles has more biomass than all other trophic levels.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Why are pyramids the shape that is used to depict the relative amounts of biomass at each trophic level?

• All of the food is converted into heat at each trophic level

• Energy is distributed equally amongst all the trophic levels

• Each trophic level supports a smaller amount of biomass

• Organisms get larger in each successive trophic level

Tags

NGSS.MS-LS2-3

What vital role do decomposers play in an ecosystem?

• Decomposers convert solar energy into chemical energy.

• Decomposers recycle nutrients within the ecosystem.

• Decomposers compete with herbivores for resources.

• Decomposers provide oxygen gas to other consumers.

Tags

NGSS.MS-LS2-3

In the food web shown, the population of which

organisms would contain the lowest amount of biomass?

• Hawks

• Mice

• Corn

• Cricket

Tags

NGSS.MS-LS2-1

Which of the following pairs of organisms could both be

classified as omnivores in the food web?

• Hawks and lizards

• Mice and birds

• Moths and crickets

• Birds and crickets

Tags

NGSS.MS-LS2-3

If there is 10,000 kJ of energy available in the producer population, how many kilojoules of energy would be found in the carnivore population?

• 10,000 kJ

• 1,000 kJ

• 100 kJ

• 10kJ

Tags

NGSS.MS-LS2-3

Which level of an ecological pyramid represents the largest biomass?

• producer population

• herbivore population

• carnivore population

• all populations are equal

Tags

NGSS.MS-LS2-3

Which organism would most likely be found at the bottom of a biomass pyramid that represented an aquatic ecosystem?

• aquatic insects

• zooplankton

• phytoplankton

• whales

Tags

NGSS.MS-LS2-3