Energy Flow in a Food Web

What do the arrows in a food web show?

• The arrow points to the organism that is about to be eaten.

• The longer arrows show more force being used to consume an organism.

• The arrows show the direction of the flow of energy in a food chain.

• The arrows indicate the time of day the organism is consumed.

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An animal that eats carrion is known as

• Detritivore

• Omnivore

• Carnivore

• Carrionivore

Producers are

• Organisms that can produce light

• Organisms that can produce their own heat

• Organisms that produce offspring

• Organisms that produce their own food

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Why are decomposers important to an ecosystem?

• They help ensure the prey population does not get too large.

• They break down dead and decaying animal and plant matter and return nutrients to the soil.

• They make the apex predators stronger.

• The can produce their own food using sunlight.

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The top predator in a food web

• Is the primary consumer

• Is always an omnivore

• Is known as an apex predator

• Is always a mountain lion

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A food web shows

• One particular path of energy flowing an ecosystem

• That energy available decreases as more organisms are consumed

• Multiple paths of energy flow within an ecosystem

• All the possible consuming relationships within an ecosystem.

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All energy flow in an ecosystem begins with sunlight.

• True

• False

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Use the grasslands food web diagram to answer: What organisms in this food web are primary consumers?

• the hawk and the fox

• the fox, prairie dog, and lizard

• the meadow lark, aphid, caterpillar, and prairie dog

• only the grass

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Use the grasslands food web diagram to answer: Which statement is true based on the diagram?

• Hawks are both predator and prey

• Foxes are omnivores.

• Lizards eat prairie dogs

• Energy flows from the caterpillar to the lizard.

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Use the grasslands food web diagram to answer: Which statement is false according to the diagram?

• Energy flows from the caterpillar to the lizard.

• Energy flows from the prairie dog to the fox.

• Energy flows from the grass to the aphid.

• Energy flows from the hawk to the lizard.

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