Environments- Evaluate 2

Some students set up an aquarium containing water, fish, and plants. Plants help support the survival of fish because they -

• remove nutrients from the soil

• use the energy of sunlight

• absorb water from their surroundings

• add needed resources to the water

Some plants grow best in damp environments. During a severe drought, these plants will most likely-

• perish

• move

• grow

• thrive

When a hurricane comes ashore, it brings large amounts of salt water with it. How might this affect the organisms in fresh water environments?

• The plants in the fresh water will move to a new location.

• The number of organisms in the environment will increase.

• Animals in this environment will begin to grow much larger.

• Organisms that cannot survive in salty water will not survive.

How might cutting down the trees in a forest environment affect the animals that live there?

• All of the animals in the forest will perish in a short period of time.

• Animals that cannot find what they need will move.

• The animals will move underground to find what they need.

• Most animals will eat different kinds of food in order to survive.

The table shows the basic needs of a robin. Which environmental change would be harmful to the survival of a robin?

• Prairie dogs digging tunnels in the ground.

• Beavers building dams across streams.

• Humans clearing forests to build houses.

• Ants building large anthills in a schoolyard.

These data tables give information on four habitats and the needs of a Fennec fox. Which habitat most closely meets the needs of the fennec fox?

• Q

• R

• S

• T

Frogs often live in freshwater ponds where they feed on insects and lay their eggs in the water. Sometimes they are eaten by snakes. Frogs would leave the area if -

• there were more insects.

• the snakes all died out.

• the water in the pond dried up.

• there was a little more rain.

All of the following are changes to an environment that could help an animal thrive EXCEPT-

• more of the kind of plants the animal eats.

• fewer predators that eat the animal.

• less rain during the spring and summer.

• removal of animals that eat the same food.

How could a forest fire help some organisms? A forest fire could help–

• remove the trees that birds use to build nests.

• clear dead plants to allow new plants to grow.

• scare away small mammals that are food for wolves.

• scare away small mammals that are food for wolves.

The chart below shows population changes after a recent flood. The information in this table shows that floods –

• are harmful to all species living in the habitat.

• cause changes that help some species thrive.

• result in large temperature changes.

• make populations of most species increase.