Habitats and Communities 4.3

Why do some animals become endangered?

• They eat other animals
• They eat only plants
• Their habitats change
• Their parents leave

Which of the following is NOT a natural change that can affect a habitat?

• weather

• plants

• pollution

• animals

Which of the following is NOT a way humans can affect a habitat?

• hurricanes

• littering

• air pollution

• overhunting

How can air pollution affect a habitat?

• it can destroy land animals live on

• animals can accidentally eat it and get sick

• it can make the air hard to breathe

• it can take over native plant life

Which of the following is NOT a way humans can protect ecosystems?

• recycling

• overhunting

• conserving water

• cleaning up when outdoors

Littering is not always a bad thing.

• True

• False

A forest is having the trees being cut down, how are the organisms being harmed that are living there?

• the organism population increases
• the organism habitat will increase
• the organism population will remain the same
• the organism habitat will decrease

Which activity would most likely pollute a river?

• beavers building a dam in the river

• fishing in the river

• building a bridge over the river

• spreading fertilizer near the river

Which is the best example of an organism having a long-term impact on an environment?

• beavers building a dam

• bears hibernating for the winter

• seasonal migration of birds

• lions hunting other animals

Humans rely on their environment to survive, but they also cause changes to the environment that are negative.

What kinds of things do humans do that are negative for the environment?

• planting new trees when older ones are cut down

• reducing emissions from cars and factories

• allowing herding animals to overgraze land

• recycling metal, paper, and plastic products