Food Chains and Food Webs

The table shows the main food source of different organisms that make up a food chain. Which set of trophic levels correctly describes the organisms?

• 
• 
• 
• 

Tags

7-LS2-3

Use the diagram that shows a river basin food web to answer the question. Which organism represents a primary consumer?

• live oak

• huckleberry

• gray squirrel

• coyote

Tags

7-LS2-3

Use the diagram that shows a river basin food web to answer the question. Which organism represents a producer?

• wild turkey

• huckleberry

• gray squirrel

• coyote

Tags

7-LS2-3

Use the diagram that shows a river basin food web to answer the question. Which organism represents a secondary consumer?

• wild turkey

• huckleberry

• gray squirrel

• coyote

Tags

7-LS2-3

Study the diagram of an energy pyramid for an environment. Which statement summarizes the relationship between energy and trophic level?

• Organisms in higher trophic levels have more energy available to them.

• The amount of energy taken in equals the amount of energy available at the next trophic level.

• Organisms in the lowest trophic level have the most energy available to them.

• Energy level is the same at all trophic levels.

Tags

7-LS2-3

Study the diagram of the energy pyramid for an environment. What happens to energy as it moves up the pyramid?

• Energy availability decreases.

• Energy availability increases.

• Energy availability remains the same.

• Energy production outweighs energy consumption.

Tags

7-LS2-3

A bird eats caterpillars that feed on plants. An incomplete energy pyramid is shown. At which level do the caterpillars belong on the energy pyramid?

• S

• R

• Q

• P

Tags

7-LS2-3

A wolf eats rabbits that feed on grass. An incomplete energy pyramid is shown. At which level does the wolf belong on the energy pyramid?

• S

• R

• Q

• P

Tags

7-LS2-3

When looking at an energy pyramid, why is the same amount of energy that is available not equal at every trophic level on the pyramid?

• Energy is lost as nuclear energy as it moves up trophic levels.

• Energy is lost as heat energy as it moves down trophic levels.

• Energy is lost as heat energy as it moves up trophic levels.

• Energy is lost as nuclear energy as it moves down trophic levels.

Tags

7-LS2-3

The diagram shows a grassland food web. Which organism shown is a producer?

• grass

• grasshopper

• rabbit

• mouse

Tags

7-LS2-3