If all of the water dries up in a pond, the fish will-

• move into a new pond.

• swim faster.

• thrive.

• perish.

An ______ includes all living and nonliving things together in an area.

• population

• ecosystem

• consumers

• producers

When a population thrives, it means that-

• the number of organisms is decreasing.

• it is growing strong and reproducing.

• the number of organisms is increasing.

• the number of organisms stays the same.

A fire destroys all of the trees and plants in the forest. How might this affect the birds in the area?

• The birds will plant seeds and grow new trees.

• The birds will have more food to eat.

• The birds will plant seeds and grow new trees.

• The birds will have no place to build their homes.

Which of the following gives an example of how birds modify their environment to meet their needs?

• Birds use twigs to build a nest.

• Birds hatch eggs and feed their young.

• Birds breathe air and drink water.

• Birds find food.

Changes to an environment may make it more difficult for an organism to find-

• food.

• shelter.

• water.

• all of the above

When an environment changes and organisms can no

longer meet their basic needs they will most likely −

• thrive.

• perish.

• not be affected.

• none of the above

A healthy environment, with no sudden changes will help

organisms to −

• die out.

• perish.

• move to new locations.

• thrive.

Very little rainfall, hot weather, and cracked ground

describe which change to an environment?

• volcanic erruption

• landslide

• drought

• flood

How might cutting down the trees in a rainforest

environment affect the animals that live there?

• All of the animals that live there will perish rapidly.

• Animals will move to new areas to meet

  their needs.

• The animals will make their homes

  under ground.

• Animals that eat tree leaves

  will become carnivores.