Energy

1. Types

1.1. electromagnetic radiation

1.1.1. Visible light waves

1.1.2. Infrared waves

1.2. mechanical

1.3. nuclear

1.4. gravitational

1.5. chemical

1.6. a whole lot more

2. Origin

2.1. The beginning of the universe

2.2. Energy has existed as long as matter

3. Energy cannot be created or destroyed

3.1. Law of conservation of energy

4. Definition

4.1. World's Most Asked Questions: What Is Energy?

4.2. Power to do work

4.2.1. Power for every kind of movement

4.2.1.1. Walking

4.2.1.2. Atoms vibrating

4.2.1.3. Sound waves

5. Classification

5.1. Kinetic

5.1.1. Movement

5.2. Potental

5.2.1. Stored Energy

5.2.1.1. Factors

5.2.1.1.1. Mass

5.2.1.1.2. Strength of Gravitational Field

6. Examples

6.1. .

6.2. .

6.3. .

6.4. .