FOSSIL FUELS DEFINITION FOR KIDS

How old is a lump of coal? This sounds like a trick question, but it isn’t. Coal is millions of years old. Anthracite, the oldest and hardest coal, is 400 million years old. All those years ago, many parts of…

WORK AND ENERGY

Do you know that you are working when you are playing? To a scientist, work is any kind of action that uses energy. Energy is needed to do all types of work—for example, to throw a ball into the air…

WHAT IS ENERGY CONVERSION?

Every form of energy can change into another form of energy.Coal is a fuel that contains stored chemical energy. When coal burns, the chemical energy inside it changes into heat energy.Energy may change in form, but it can’t be made…

SOUND ENERGY DEFINITION FOR KIDS

Have you ever heard a jet airplane when it is getting ready to take off? The noise that the plane makes is sometimes so loud that you cannot hear any other noise.Sound is a type of energy. Sounds are produced when…