1. Bell Ringer What do you think the word energy means?
2) Do you know the difference between kinetic and potential energy?
If so, explain it in your own words.

2. Bell Ringer Name one type of kinetic energy and give an example.
2) Name one type of potential energy and give an example.

3. Energy Energy is the ability to cause change.
Energies can be divided into 2 main categories
Kinetic Energy: Movement
Potential Energy: Stored

4. Kinetic Energy
Kinetic energy is motion. This can be the movement of large objects or the movement of small particles (atoms & molecules)
There are 4 types of kinetic energy for you to learn:
Macroscopic
Sonic Energy
Electricity
Thermal Energy

5. Kinetic Energy #1: Macroscopic
Macroscopic Kinetic energy is the energy of moving objects that are visible to the naked eye.
Amount of kinetic energy depends on 2 factors:
The faster an object is moving, the more KE it has.
The more mass an object has, the more KE it has.
3 Examples of Macroscopic KE:
Train rolling
Bullet in flight
Running Athlete

7. Kinetic Energy #2: Sonic Energy
Sonic energy is sound waves.
Sound is a vibration. The movement caused by sound waves is a type of kinetic energy.
3 Examples of Sonic Energy:
Vibration of a guitar string
Feel of a subwoofer
Human vocal cords

9. Kinetic Energy #3: Electricity
Electricity is the flow of electrons.
Electrons are very tiny negatively charged particles. Their movement creates electricity.
3 Examples of Electricity:
Current through a wire
Lightning strikes

11. Kinetic Energy #4: Thermal Energy
Thermal energy is energy that comes from heat.
When objects become hot, the particles of that object (atoms & molecules) begin to vibrate faster.
3 Examples of Thermal:
Hot Stove
Warm Sidewalk
Boiling water

13. Potential Energy
Potential energy is stored and waiting to be released.
There are 3 types of potential energy for you to learn:
1) Gravitational Potential
2) Elastic Potential
3) Chemical Potential

14. Potential Energy #1: Gravitational Potential
Gravitational Potential Energy (GPE) is stored in an object due to its height above the ground.
Amount of GPE depends on 2 factors:
Objects that are higher up have more than lower ones
Heavier objects have more than lighter ones
3 Examples of GPE:
A person on a cliff
A ball at the top of a hill
A book on a rooftop

16. Potential Energy #2: Elastic Potential
Elastic Potential Energy (EPE) is stored in an object when it is bent, stretched, or squeezed.
EPE is released when the object snaps back to its original shape.
3 Examples of EPE:
A bent plastic ruler
A stretched rubber band
A compressed spring

18. Potential Energy #3: Chemical Potential
Chemical Potential Energy (CPE) is stored in the bonds holding together the atoms of a substance.
CPE is released when atoms break their bonds and re-bond into new arrangements.
3 Examples of CPE:
A firework before exploding
Gasoline before it is burnt
Calories in food

20. Homework 2 short readings with questions
Kinetic & Potential Energy in Baseball
Gravitational Potential Energy