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Explain the flow of energy in this food chain (who passes energy to who).

• The hawk gives energy to the snake. The snake gives energy to the mouse. The mouse gives energy to the grasshopper who gives energy to the grass.

• The mouse gives energy to the hawk. The snake gives energy to the grasshopper. The grass gives energy to the snake.

• The grass gives energy to the grasshopper. The grasshopper gives energy to the mouse. The mouse gives energy to the snake who gives energy to the hawk.

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A diagram that combines many food chains into one picture.

• Food Pyramid

• Food Chain

• Food Web

• Food Source

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Which best describes how decomposers help support life in an ecosystem?

• Decomposers add nutrients to the soil.

• Decomposers provide a habitat in the ecosystem.

• Decomposers add producers to the ecosystem.

• Decomposers provide energy for consumers.

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Where does the energy start in this food chain?

• Plant
• Sun
• Deer
• Wolf

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What is the role of decomposers in a food chain?

• Use sunlight to make food
• Eat other organisms to gain energy
• Make the food for the whole food chain
• Break down dead organisms and add nutrients to the soil

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Which of these organisms would receive energy from the snake?

• Plant
• Rabbit
• Mouse
• Hawk

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The transfer of energy from one organism to the next in an ecosystem begins with a producer. A producer is an organism that produces its own food. A consumer is an organism in a food chain that obtains energy from producers or other consumers; consumers may be herbivores or carnivores.

Which food chain correctly describes the flow of energy in an ecosystem?

• grass → grasshopper → fish → human

• grasshopper → fish → human

• human → fish → grasshopper

• human → grasshopper → fish → grass

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Living and nonliving things interacting in an environment is called:

• Organism

• Producer

• Consumer

• Ecosystem

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Which living thing is a producer?

• plankton

• animals

• plants

• bacteria

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When a millipede breaks down dead and decaying material, it is acting as what?

• a decomposer
• an apex predator
• a producer
• prey

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