85 Heat Energy-Low

Heat Energy Written by Felicia Brown

Introduction Have you ever stood next to a campfire? Have you ever watched soup boil? Then you have seen and felt heat energy at work! There are many kinds of energy. But you use heat energy all the time. In this book, you will learn where heat energy comes from, how it moves and much more.

Sources of Heat Energy Rub your hands together very fast. Do they feel hot? The heat is caused by friction. Friction happens when two objects rub together. Friction is one way to make heat!

Burning fuel is another way we get heat. Gasoline is a kind of fuel. When gasoline burns, it makes heat energy. The heat energy is used to make cars and trucks run. Electricity also makes heat energy. Toasters, irons, and hair dryers use electricity to make heat. Electric furnaces heat homes and schools.

Heat comes from nature, too. Lightning is a natural source of heat. And did you know that Earth has its own heat deep underground? It is so hot in the middle of Earth that rocks melt. Sometimes the melted rocks come close to the surface and heat water that shoots out of the ground. This shooting water is called a geyser.

A lot of our energy comes from the Sun. Have you ever stepped from the shade into sunlight and felt warm? Sunlight is radiant energy. Radiant energy comes in many different forms. When sunlight hits your skin, it changes to heat. Another form of radiant energy cooks the food in your microwave.