Environments

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.

• burn the organic matter from soil where worms live.

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.

• make populations of most species increase.

• result in large temperature changes.

• cause changes that help some species thrive.

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

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.