Food Chains and Food Webs Review

How are a food chain and a food web different?

• A food chain shows only one path of energy flow whereas a food web shows all the possible food chains in an ecosystem.

• A food chain shows only one path of energy flow whereas a food web shows how much of the energy is transferred each time.

• A food chain shows all the possible ways energy flows in an ecosystem whereas a food web shows only one path of energy flow.

• A food chain shows how much energy is transferred in an ecosystem whereas a food web shows all the possible food chains.

Which of the following shows the correct order of a food chain?

• Sun → Mouse → Grass → Owl

• Sun → Grass → Owl → Mouse

• Owl → Mouse → Grass → Sun

• Sun → Grass → Mouse → Owl

Which of the following is true about food webs?

• Food webs are not as realistic as food chains.

• Food webs are not as good as energy pyramids because you cannot see how multiple components can be affected by an ecological event.

• The predator(s) in a food web may be in more than one food chain because food webs show more feeding options.

• Food webs are only useful in ecosystems with hundreds of organisms.

What do the arrows in a food chain or food web represent?

• The increasing size from one organism to another.

• The origin of all the energy within an ecosystem.

• The direction of the flow of energy.

• All of the above.

If seals eat krill that feed on algae, which level in the pyramid below would seals occupy?

• A

• B

• C

• D

Where is the most available energy represented on an energy pyramid?

• Top

• Bottom

• Middle

• All locations have the same amount of available energy

Use the food web below to answer questions. Which of the following organisms could be considered a primary consumer and a secondary consumer according to the food web?

• Fox

• Snake

• Caterpillar

• Mouse

Use the food web below to answer questions. Which organism feeds on the largest variety of organisms in the food web?

• Snake

• Hawk

• Fox

• Frog

Use the food web below to answer questions. Which of the following is not a food chain contained within the food web?

• Flower → Mouse → Snake → Hawk

• Leaves → Caterpillar → Frog → Hawk

• Flower → Rabbit → Snake → Hawk

• Leaves → Lady bug → Mouse → Fox

A ____________________ is a system of many overlapping food chains. Each answer choice will be used once.

• Food Web

• Food Chain

• Ecosystem

• Habitat