1. Energy Types
Energy Conversions

2. Energy Conversions
Energy conversion- a change from one form of energy to another.
What are some other forms of energy??
Any form of energy can change to another
Some forms of energy change into more than one other form of energy
Attention Grabber- knock something off the table “not” on purpose and discuss the gravitational potential energy and the change to kinetic energy of the falling object

3. Two Types of Energy
All energy can occur as two types: potential or kinetic energy

4. Two Types of Energy potential and kinetic clip
Energy in motion (click on)
Two Types of Energy potential and kinetic clip
Potential Energy
Kinetic Energy
Stored energy

5. Mrs. Chen (7 energy conversions)
PPT clip
Mechanical
Radiant
Sound
Chemical
Heat
Elastic
Nuclear

6. Mechanical Energy
The sum of an object’ s kinetic and gravitational potential energy

7. Radiant (Light) Energy
Energy produced by vibrations of electrically charged particles

8. Sound Energy
Energy caused by an object’s vibration

9. Chemical Energy
Energy stored in chemical bonds of a substance that can be released when the substance reacts

10. Heat(thermal) Energy
Energy related to particle motion. More motion more heat

11. Elastic Potential Energy
Elastic potential energy-energy stored in elastic (ex: rubber band)
Use a large rubber band (an exercise band works well) and shoot a soft ball into the class. Then do it again but discuss the potential and kinetic energy of the ball and band as its being extended and released.

13. Nuclear Energy
The form of energy associated with changes in the nucleus of an atom when it splits(fission) or comes together(fusion)

14. Why is the sun so important?
All of our energy can be traced back to our sun.

15. Energy Conversions in Plants
Question to class: what is the process called of plants converting light energy into food/chemical energy? PHOTOSYNTHESIS
Light energy is given to plants to form chemical energy which is given to us for kinetic or thermal energy! (or others..)

16. Energy Conversions in Plants
ALL food’s energy comes from the SUN
EVEN meat… animals eat plants and we eat animals

17. Conversions involving electrical energy
Common conversions of electrical energy
Alarm Clock
Electrical energy  light energy and sound energy
Battery
Chemical energy  electrical energy
Light bulb
Electrical energy  light energy and thermal energy
Blender
Electrical energy  kinetic energy and sound energy

18. Chemical energy in your body is converted into kinetic energy when your muscle fibers contract and relax
Your legs transfer this kinetic energy to the pedals by pushing them around in a circle
The chain moves and transfers energy to the back wheel, which gets you moving!
The pedals transfer this kinetic energy to the gear wheel, which transfers kinetic energy to the chain

19. Review In your own words…what is energy conversion?
In plants, energy is transformed from
A. kinetic to potential
B. light to chemical
C. chemical to electrical
D. chemical to light
Describe a case in which electrical energy is converted into thermal energy.
How does your body get the energy that it needs?

20. Summarizer
How does energy change from one form to another?