Ecosystems Review

Which describes a decomposer?

• an organism that eats only plants
• an organism that makes its own food
• an organism that breaks down dead matter
• an organism that receives energy from the sun

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NGSS.MS-LS2-3

In a food chain, the sun provides energy for an apple tree to grow. A deer eats an apple from the tree. Which is a consumer?

• the tree
• the apple
• the sun
• the deer

An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?

• They break down dead organisms to return nutrients to the soil.
• They produce their own food for survival.
• They play a role in preventing weathering and erosion.
• They provide most of the energy to consumers.

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Which best describes a producer?

• an organism that gets its energy from plants
• a plant that makes its own food
• the sun because it provides energy for plants
• an organism that gets its energy from animals

Tags

NGSS.MS-LS2-3

Tyler is classifying organisms according to their source of energy. Based on the food chain pictured, which organism would be considered a carnivore?

• ant
• bird
• maple leaf

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NGSS.MS-LS2-3

What best describes the roles of the organisms pictured in order from left to right?

• consumer, producer, consumer
• producer, decomposer, consumer
• consumer, decomposer, consumer

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Which is the first organism in a food chain?

• decomposer
• producer
• consumer

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In which category are all living things most directly dependent upon the sun for energy?

• carnivores
• producers
• herbivores
• decomposers

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How are consumers and decomposers related?

• Decomposers provide soil for consumers.
• Consumers change the sun’s energy so it is useful for decomposers.
• Decomposers provide food for carnivorous consumers.
• Consumers provide nutrients for decomposers.

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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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