Book 22, Question 1
What Exactly Is Energy?
Energy is the ability to make something change or move. It is what lets a ball roll, a plant grow, a bulb glow, and a kid run. You cannot hold it in your hand, but you can see what it does!
More fun facts
- Scientists define energy as the ability to do work.
- Every kind of energy is either stored energy, called potential energy, or moving energy, called kinetic energy.
- People use energy for everything from walking to sending astronauts into space.
- Energy can be changed from one form into another.
- Modern life is possible because people learned how to change energy from one form to another and put it to work.
- Energy sources are split into two groups: renewable and nonrenewable.
Questions kids ask
Is energy a kind of stuff?
No. Scientists describe energy as the ability to do work, like moving, heating or lighting something.