5th grade ch 3 science test

A coral reef aand the organisms that live in it form

• a habitat

• a community

• a population

• an ecosystem

The shortes food chain consists of

• a consumer and a decomposer

• two producers

• two consumers

• a producer and a decomposer

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Where would you be most likely to find animals with thick fur coats?

• coral reef

• tropical rain forest

• tundra

• desert

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Which describes both a food chain and a food web?

• both contain only consumers

• both begin with a producer

• both contain multiple ways that energy flows

• both must include a carnivore

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A desert provides the resources needed to supoort a population of

• rattlesnakes

• bison

• woodpeckers

• oak trees

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The relationship between an owl and a mouse is an example of

• competition

• symbiosis

• predator and prey

• producer and consumer

Which event would cause an ecosystem to change quickly?

• a climate change

• an earthquake

• a lake drying up

• a rock becoming soil

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Nonnative animal populations can grow rapidly in a new ecosystem because

• predators in the ecosystem are not used to hunting them

• they have no competiton for resources in the ecosystem

• nonnative species are always at the top of the food chain

• they are producers

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Explain how producers, consumers, and decomposers all ehlp an ecosystem support the populations within it.

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Look carefully at the image. How is each population in the food chain affected if humans start using large amounts of pesticides in neaby areas?

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