Quiz Review: Food Chains & Energy Flow

Which best describes how energy from the sun relates to the energy a cow gets from eating grass in a field?

• The cow absorbs energy from the sun, and stores the energy in its body.

• The cow absorbs energy from the sun, and uses this energy to break down the grass it eats.

• The grass absorbs energy from the sun; the cow eats the grass and releases additional energy to the grass.

• The grass uses energy from the sun to make food; the cow eats the grass and breaks it down to release energy for the cow to use.

After decomposers break down decaying organisms, which directly uses the resulting nutrients?

• animals

• fossils

• plants

• the sun

Decomposers increase the fertility of the soil and prevent dead organisms from building up in the environment. In which way do decomposers make the soil more fertile?

• by adding carbon

• by adding nitrogen

• by removing excess water

• by removing excess minerals

From what source does most of the energy in an ecosystem come?

• oil

• wind

• water

• sunlight

A bear that eats fish that ate algae is a ____________:

• secondary consumer

• primary consumer

• tertiary consumer

• producer

Which shows the correct flow of energy through this simple food chain?

• fox → grass → rabbit

• grass → fox → rabbit

• grass → rabbit → fox

• rabbit → grass → fox

Through which process do producers convert sunlight into food energy which is consumed and passed on to other organisms?

• Oxidation

• Reduction

• Photosynthesis

• Cellular respiration

Consider an energy pyramid. Which statement best explains the flow of energy as it moves through the different levels?

• Energy decreases as it is lost as heat to the environment.

• Energy increases as it is gained from the environment.

• Energy is unavailable because it is used up by the organisms at Level 1.

• Energy is transferred as it is produced by organisms in the next level.

Which level of a food chain has the most energy?

• Decomposers

• Scavengers

• Consumers

• Producers

The organisms shown live in the same habitat. Which best describes the exchange of energy between the organisms?

• Each organism obtains energy from the environment.

• Each organism obtains energy by eating other organisms.

• One organism obtains energy from the environment, while the others obtain energy by eating other organisms.

• One organism obtains energy by eating other organisms, while the others obtain energy from the environment