1. Unit 4 Thermodynamics- Lecture 1:
What is Energy? With your table group come up with a definition and examples of energy. Record on your group’s whiteboard

2. Unit 4 Thermodynamics- Lecture 1:
PS 3-3 Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy. a. Students know that energy can be characterized as potential or kinetic. b. Students know the law of conservation of energy and that energy can be converted from one form to another.

3. ENERGY: The ability to do work or produce heat
Two basic forms:
Potential: energy of composition or position of an object.
Ex. water behind a dam or energy in bonds of a molecule
2. Kinetic: energy of motion
Ex. water moving out of a dam or the movement of molecules

4. PE: Potential Energy
KE: Kinetic Energy

5. Six Forms of Energy Chemical: potential energy stored in bonds
For example coal, glucose, and petroleum
Mechanical (work): energy of a moving object
For example wind, and a car crash
Thermal (heat): energy of the motion of molecules (friction)
Example a cup of hot water

6. Six Forms of Energy
Radiation (light): energy related to movement of light, electromagnetic waves, or particles
For example visible light, x-rays, and sunshine.
Electrical: energy of the movement of electrons
For example a circuit, and lightning.
Nuclear: energy stored inside the nucleus of an atom.
For example fusion occurring in the sun

8. Law of conservation of energy:
Energy can not be created or destroyed
Energy can be converted.

9. Conversion of Energy

10. Energy used in moving a car Only 25% of potential energy becomes mechanical (kinetic) energy the rest is lost as heat (thermal energy).