Organisms and Environments 3rd grade

Freshwater frogs eat insects and lay eggs. Sometimes frogs 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 changes to an environment could help animals survive 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?

• by removing trees the birds use to build their nests

• by clearing dead plants to allow new plants to grow

• scaring away small mammals that are food for wolves

• burning the organic matter from soil where worms live

Define organism

• continue to live

• a living thing

• all members of a species

• to die

Define drought

• Continue to live

• All members of a species living together

• A living thing

• Long period of dry weather

Define extinction

• All members of a species living together

• When all members of a type of species die out

• continue to live

• rising of a body of water that overflows onto normally dry land

What happens to a pond during a drought?

• The population in the ecosystem increase.

• The water in the pond dries up.

• Frogs will lay more eggs.

• The pond will flood and overflow.