Basic Concepts
In a nutshell: Energy is the ability to do work or cause change, and it exists in many forms all around us.
## Energy Is Everywhere
Energy is what makes things happen! It can’t be created or destroyed, only changed from one form to another. Energy comes in many types, like **kinetic** (movement), **potential** (stored), **thermal** (heat), and more.
## Forms of Energy
- **Kinetic Energy:** The energy of moving things—like a rolling ball.
- **Potential Energy:** Stored energy—like a stretched rubber band.
- **Thermal Energy:** Energy from heat—like a hot cup of cocoa.
- **Chemical Energy:** Stored in food, batteries, and fuels.
## The Law of Conservation of Energy
The total energy in a closed system stays the same. If you jump off a wall, your potential energy changes to kinetic energy, but the total energy remains constant.
## Energy in Action
Everyday actions—like running, eating, or turning on a light—use energy and often change it from one form to another.
Examples
- A car moving uses kinetic energy.
- A battery stores chemical energy until you use it in a toy.
Key terms
- Energy
- The ability to do work or cause change.
- Kinetic Energy
- Energy due to motion.
- Potential Energy
- Stored energy due to position or condition.