Science Study Guide page 3

What is an ecosystem?

• A body of water with marine life

• A community of plants and trees

• An area where living and nonliving things interact

• A group of animals living in the same place

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What are nonliving factors of an ecosystem?

• Birds, insects, and mammals

• Sunlight, water, nutrients, soil, and air

• Fish, algae, and coral

• Rocks, mountains, and valleys

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What is a population in an ecosystem?

• All the organisms of the same species that live in the same place at the same time

• A group of different species living together

• The largest animal in the ecosystem

• The total number of plants in the ecosystem

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What makes up a community in an ecosystem?

• Populations of species that live in the same place at the same time

• Individual organisms of different species

• Nonliving factors of the ecosystem

• The largest plants in the ecosystem

What is the central idea of an ecosystem?

• An ecosystem is a group of unrelated organisms

• An ecosystem is a collection of different habitats

• An ecosystem is made up of interacting components that allow for the transfer of matter and energy

• An ecosystem is a static environment

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What do food webs show in an ecosystem?

• The flow of energy within an ecosystem

• The number of plants in the ecosystem

• The different colors of animals in the ecosystem

• The size of the ecosystem

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Where is the greatest amount of energy in an ecosystem?

• In the consumers

• In the producers

• In the decomposers

• In the nonliving factors

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What contributes to the flow of energy and cycles of matter within an ecosystem?

• The number of clouds in the sky

• The temperature of the ecosystem

• The life processes of plants and animals

• The speed of the wind

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