1. THE SCIENCE OF ENERGY \

2. Can you make things move?
1. What is Energy?
The ability to make things move or do work
Can you make things move?
Then you have energy!

3. 2. The Law of Conservation of Energy-”energy is neither created or destroyed”
The energy we use is stored in different forms. We do not use it up, it is just changed or transformed into other forms of energy.

4. 3. Energy Efficiency
The amount of useful energy obtained from a system

5. Energy Transformation Demo
Copy this Chart in your journal
1/3 Full
Full
0 C
0 F
Starting Temp
Ending Temp
Change in Temp

6. Ultimately all energy comes from nuclear energy
Demo Energy Flow
Thermal energy from body in motion
Body got energy from chemical energy stored in food
Chemical energy in food came from transforming radiant energy from the Sun through photosynthesis
Radiant energy was created by nuclear energy of fission
Ultimately all energy comes from nuclear energy

7. *5 Main Things Energy can help us do…….
make things move
make heat
make light
make technology work (run electrical devices)
make things grow
Can you think of an example of each?

8. **2 Major forms of energy
Potential-stored energy; energy of position; energy at rest
Depends on height and weight
Can be calculated with the formula: PE= W x H

9. 1a. Chemical Energy… (potential energy)
is the energy stored in the bonds of atoms and molecules.
Examples: Biomass, petroleum, natural gas, propane, and coal
Can be released by chemical reactions like burning wood

11. 1b. Nuclear Energy (potential energy)
Holds protons and neutrons together in an atom’s nucleus
Powers the sun and nuclear power plants
The energy in the nucleus of a uranium atom is an example.

15. 1c. STORED MECHANICAL ENERGY (potential energy)
is energy stored in objects by the
application of force.
Examples: Compressed
springs and stretched rubber bands

16. 1d. Gravitational Energy (potential energy)
is the energy of place or position.
Water in a reservoir behind a hydropower dam is an example.

17. Kinetic-energy of motion (waves, atoms, molecules, substances)
Kinetic-energy of motion (waves, atoms, molecules, substances) *can be affected by mass and speed * can be calculated: KE=1/2mv2

18. 2a. Electrical Energy (kinetic)
The movement of electrons through matter
Electricity and lightning is a form of electrical energy

21. 2b. Thermal/Heat Energy (kinetic)
The random motion, or vibration, of atoms in matter
Internal energy of substances
The faster the atoms vibrate the more heat energy they have
Example: geothermal

23. 2c. Radiant/Light Energy
The energy carried by light in the form of electromagnetic (transverse-side to side) waves
All lights and the rays of the Sun (Solar) are examples

26. 2e. Mechanical/Motion Energy (kinetic)
The energy of moving things
When you ride a bike you use mechanical energy
Wind and hydropower are some other examples

29. 2f. Sound Energy Vibrates air molecules
The air molecules move tiny bones in your ear
The message of sound then moves to your brain
Can also vibrate objects in longitudinal waves

32. Energy can be changed from one form to another
Chemical energy in gasoline is changed to heat energy and then to mechanical energy in a car