Caring for our planet

About 70% of Earth is covered with

• deserts.

• water.

Scientists think that Earth is getting

• colder.

• warmer.

Some people are worried because the oceans are getting

• higher.

• lower.

Coal and oil are

• fossil fuels.

• natural resources.

Fossil fuels are

• non-renewable resources.

• renewable resources.

Earth gets heat from

• the plants.

• the sun.

When we use fossil fuels, we make

• carbon dioxide.

• oxygen.

Carbon dioxide increases

• the greenhouse effect.

• the number of plants.

Oceans and plants use

• carbon dioxide.

• oxygen.

Hydroelectricity is made by using energy from moving

• hot water.

• moving water.