The main source of heat and light is _____

• The sun

• Energy

We need ____ to run .

• Wind

• Energy

Moving air is called ____

• Sun

• Wind

Some power plants burn natural gas to make ____

• Electricity

• Force

The ability to do work is.

• Energy

• Force

The word solar refers to:

• The moon

• The sun

Which source of energy for is not limited for us?

• The sun

• Natural gas

A dam uses ____ to make electricity.

• Coal

• Flowing water

Smoke from cars, buses and factories makes:

• The land dirty

• The air dirty

Everything around a living thing is the part of it's:

• Environment

• Culture