Our earth gets most of its energy from the sun. We call this energy solar energy. Sol means sun.
Solar energy travels from the sun to the earth in rays. Some are light rays that we can see.
Some are rays we can’t see, like x-rays. Energy in rays is called radiant energy.
The sun is a giant ball of gas. It sends out huge rays of energy every day. Most of the rays go off into space. Only a small part reaches the earth.
When the rays reach the earth, some bounce off clouds back into space—the rays are reflected. The earth absorbs most of the solar energy and turns it into heat. This heat warms the earth and the air around it—the atmosphere. Without the sun, we couldn’t live on the earth—it would be too cold.




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