1. Chapter 13 Lesson 1: Forms of Energy
Ms. Amanda and Ms. Diana

2. What is Energy? Energy – the ability to cause change
These changes can be
Loud sounds
Flashes of light
Photosynthesis
Changes in motions and positions of objects

3. Kinetic Energy – Energy of Motion
Kinetic Energy – energy due to motion. All moving objects have kinetic energy.
Kinetic Energy and Speed – The faster an object moves, the more kinetic energy it has.
Kinetic Energy and Mass – An object with more mass has more kinetic energy.

4. Potential Energy – Stored Energy
Even if an object is not moving, it still has energy.
Potential Energy – stored energy due to the interactions between objects or particles.
Forms of potential energy:
Gravitational
Elastic
Chemical

5. Gravitational Potential Energy
Gravitational Energy is stored energy between objects and Earth.
When you lift an object off the ground, you increase the gravitational potential energy.

6. Elastic Potential Energy
Elastic Potential Energy is stored in objects when they are stretched.
Example:
Stretching a Rubber band
When you stretch the rubber band, you give it elastic potential energy. When you let the rubber band go, the elastic potential energy is transformed to kinetic energy.

7. Chemical Potential Energy
Chemical Potential Energy – energy stored in the chemical bonds between atoms.
Examples:
Food
Gasoline
Your body uses chemical potential energy in food for all of its activities.
People use chemical potential energy in gasoline to power their cars.

8. Energy and Work
Work – the transfer of energy that occurs when a force makes an object move in the direction of the force while the force is acting on the object.

9. Other Forms of Energy
Mechanical Energy – the sum of potential energy and kinetic energy.
Sound Energy – energy that sound carries
Thermal Energy – sum of kinetic energy and potential energy of the particles (heat)
Electric Energy – energy from an electric current
Radiant/Light Energy – energy from electromagnetic waves
Nuclear Energy – energy from the nucleus of an atom

11. Questions