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What is energy?
1. Scientists define energy as the ability to do work.
2. Energy is the ability to cause change; it does things for us.
What is energy?
1. Energy makes things move. For example: It moves cars along the road and boats over the water.
What is energy?
2. Energy makes things warm up. For example: It bakes a cake in the oven and keeps ice frozen in the freezer.
What is energy?
3. Energy lights our homes! 4. Energy makes technology work (runs electrical devices!)
Two Types of Energy
Kinetic energy Potential energy
Energy of motion
Motion that is actually happening right now Waves moving
Electrons moving
Ball falling
You jumping.
Stored energy
Energy that hasn’t happened YET Bungee jumper before
the jump
Someone holding a ball above the ground.
Forms of Energy Kinetic Energy:
1. Electrical
2. Radiant (light)
3. Thermal (heat)
4. Mechanical
5. Sound
Potential Energy:
6. Nuclear
7. Chemical
8. Gravitational
Type of Kinetic Energy
Electrical Energy
Energy an electric current carries
How does electricity work?
Electrons gain enough energy to move
Electricity moving in a wire or lightning
Type of Kinetic Energy
Radiant Energy (Light)
Energy carried by traveling electromagnetic/transverse waves
Radio waves Microwaves Infrared Visible Light Ultraviolet X-rays Gamma rays.
Solar energy is an example of radiant energy.
Type of Kinetic Energy
Thermal Energy (Heat)
The sum of kinetic and potential energy of the particles in an object
What is heat? particles moving cells moving atoms moving
Example: geothermal energy
Type of Kinetic Energy
Sound Energy
•Vibrations produce sound waves
•Longitudinal
•Compression
•Energy transferred through a medium
Type of Kinetic Energy
Mechanical Energy
All the potential and kinetic energy in a system of objects
Movement
Examples: Mouse moving it’s
arms
When the mouse trap snaps.
Potential Energy
Chemical
Energy stored in the bonds of atoms and molecules
Energy that holds these particles together.
Examples: Biomass Petroleum Natural gas Propane a Anything you burn
for energy
Type of Potential Energy
Nuclear Energy
Energy holding nuclei together
How do we get this energy: Fission: splitting nuclei
Fusion: combining nuclei