Energy Flow Review

Rosa has a vegetable garden. She places earthworms, which are decomposers, in the garden soil.

What is Rosa most likely trying to do?

• prevent insects from eating the plants

• create usable food energy for the plants

• enrich the soil with nutrients

• kill the bacteria in the soil

Skunks eat fruits, worms, plants, fish, insects, and more.

Which describes the role of a skunk?

• autotrophic omnivore

• heterotrophic omnivore

• autotrophic carnivore

• heterotrophic carnivore

A(n) __________________________ is an organism that breaks down dead organisms and waste.

• carnivore

• herbivore

• consumer

• decomposer

A meadow food chain is shown. What is the role of the mouse?

• primary consumer

• secondary consumer

• producer

• decomposer

Which organism is a carnivore?

• giraffe

• elephant

• lion

• bear

What are the roles of consumers? Select two options.

• to create usable food energy

• to balance the number of producers in an ecosystem

• to break down dead organisms

• to eat other organisms

• to provide energy for producers

Study the diagram of a desert food chain.

What would most likely happen if the kangaroo rats were killed off and removed from the food chain?

• The number of snakes would increase.

• The number of cactus plants would increase.

• The number of foxes would be unaffected.

• The number of cactus plants would be unaffected.

Which organism gains energy directly from eating the krill?

• phytoplankton

• cod

• leopard seal

• zooplankton

Which organism has the most available energy?

• sea urchin

• sea otter

• kelp

• elephant seal

Which statements describe the energy in a food web? Select three options.

• When an organism eats another organism, it loses energy.

• Producers have the greatest amount of available energy.

• Energy can follow many different paths.

• When an organism eats another organism, it gains energy.

• Producers have the least amount of available energy.