Energy

1
Energy

• Where Energy Begins
• Types of Energy
• Forms of Energy
• Changes
• Conservation

2
The Sun

• Sun 100,000 trillion large power stations
• All plant and animal life relies on the sun
• Responsible for all types of energy

3
What is Energy?

• Is the ability to do work
• Without Energy
• Nothing could live or grow
• No movement
• Energy is heat, light and sound

4
Two Basic Kinds of Energy

• 1. Potential Energy
• Stored energy
• In a position that is affected by a force
• Examples
• Magnetic potential energy (magnets)
• Gravitational potential energy (skier)
• Elastic potential energy (rubber band)
• Strain energy (spring)

5
Two Basic Kinds of Energy

• 2. Kinetic Energy
• Energy of motion
• Faster is moves, more energy it has
• More speed and mass more kinetic energy
• Examples
• Running
• Hammer in to a nail
• Car in to a wall
• Brian Urlacher in to Brett Favre

6
Check Point!!

• The ability to do work is called?
• The two kinds of energy are called?
• Stored energy is ________energy.
• Gravitational potential energy is energy of
  __________.
• Kinetic energy is energy of______.
• A diver on a diving board has ____________
  potential energy.

7
Different Forms of Energy

• Five Main Forms
• Mechanical Energy
• Electromagnetic Energy
• Heat Energy
• Chemical Energy
• Nuclear Energy

8
Mechanical Energy

• Things in motion
• Wind
• Water
• Falling rocks
• Walk, run, ride a bike
• Sound

9
Electromagnetic Energy

• Invisible, except for light
• Electricity
• Light
• Radio
• Television
• Microwave

Gamma Rays X-Rays Ultraviolet Rays
Visible Light Infrared Rays
Microwaves Radio Waves
10
Heat Energy

• Energy of moving particles of matter
• Faster they move more heat
• Heat causes expansion (boiling water)
• Reflection
• Give an example of your body working faster than
  normally. Explain what happens to your body when
  you work fast and why.

11
Chemical Energy

• Holds particles of matter together
• Is released during chemical reactions
• Example
• Matches
• Wood
• Coal
• Batteries
• Food
• Oil
• Gasoline

12
Nuclear Energy

• Stored in the nucleus of an atom
• Energy is released as heat and light

13
Check Point!!!

• Where does you body get energy from?
• How many basic forms of energy are there?
• What kind of energy is light?
• What is mechanical energy?
• What kind of energy is produced when you rub your
  hands together?
• What kind of energy is released when wood burns?