Organisms in Ecosystems Review

What is the main reason animals migrate?

• To find new friends

• Because of changes in temperature or precipitation

• To exercise more

• Because they are bored

Why do animals hibernate?

• Because they like sleeping

• To save energy during cold times when food is scarce

• To avoid predators

• Because they are tired

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What happens when a plant becomes dormant?

• It grows bigger

• It produces more flowers

• It becomes inactive for a period of time

• It changes color permanently

Why do many animals have their babies in spring?

• Because spring is warmer with more rainfall

• Because there are more predators

• Because winter is too cold

• Because the days are longer

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In a food chain, what do producers do?

• They eat other animals

• They make their own food

• They hunt prey

• They sleep all winter

What happens if too many predators are in an ecosystem?

• The ecosystem becomes healthier

• There won't be enough prey for them to eat

• The plants will grow faster

• Nothing changes

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If grasshoppers disappear from a food chain, what happens first?

• Plants will grow too much

• Animals that eat grasshoppers will have no food

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During a drought, how do some plants survive?

• They move to a new location

• They store water in their leaves or roots

• They grow taller

• They change color

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How do animals typically respond to floods?

• They stay where they are

• They move to higher ground or fly away

• They swim underwater

• They dig holes

What is a fossil?

• A type of rock

• A living animal

• Preserved remains of organisms from long ago

• A type of plant

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