Flow of Energy in an Ecosystem

How does energy first enter a pond ecosystem?

• through growth of algae

• through light from the sun

• through decay of dead fish

• through runoff from fields

What statement is true about energy in an ecosystem?

• energy for most ecosystems originates from the sun

• energy most often is released as light from an ecosystem

• energy flows from heterotrophs to autotrophs

• energy levels increase toward the top of the food chain

What happens to the energy that the fox uses for maintaining its body temperature?

• its taken up by decomposers that consume the fox

• it moves into the surrounding environment

• it stays in the fox through the metabolism of food

• it travels to the next trophic level when the fox is eaten

A __________ is a simple model that shows how energy flows through an ecosystem.

• trophic level

• food web

• food chain

• ecosystem

A ___________ is a model representing the many interconnected food chains and pathways in which energy flows through a group of organisms.

• biome

• food chain

• trophic level

• food web

A plant is an example of a _________?

• producer

• herbivore

• omnivore

• carnivore

A grasshopper is an example of a __________?

• producer

• omnivore

• herbivore

• carnivore

A mouse is an example of a ___________?

• omnivore

• herbivore

• carnivore

• producer

A snake is an example of a ___________?

• carnivore

• herbivore

• producer

• omnivore

Each step in a food chain or a food web is called a __________?

• biome

• ecosystem

• trophic level

• biosphere