1. Energy exists in different forms.
Forms of Energy
Energy exists in different forms.
Learning Goal: Identify the two general types of energy as kinetic energy and potential energy.

2. I. Different forms of energy have different uses.
Energy – causes change to occur
Different forms of energy cause change in different ways

3. 1. Mechanical energy
2. Sound energy
results from the vibration of particles
Structures within the ear detects tiny vibrations
Cannot travel through empty space (needs air)
energy that moves objects
turning a key

4. stored in the chemical composition of matter
3. Chemical energy
4. Thermal energy
stored in the chemical composition of matter
Depends on types and arrangements of atoms
energy from the movement of particles in matter
Heat

5. 5. Electromagnetic energy 6. Nuclear energy
transmitted as electromagnetic waves
Can travel through empty space
Ex: visible light, x-rays, microwaves
comes from the nucleus (center of atom)
Holds nuclear particles together
Released when nucleus falls apart or 2 nuclei join together
Keeps Sun burning

6. II. Kinetic energy and potential energy are the two general types of energy.
Kinetic energy – energy of motion
Increases as mass increases
Increases as speed increases

7. Potential energy – stored energy
due to an objects position (gravity)
due to an objects chemical composition (the atoms it contains)
Ex: jack in the box
Compressed spring = increased potential energy
Released spring = decreased potential energy

8. Potential energy changes to kinetic energy
Chemical energy is potential energy
Stored within chemical bonds
Ex: fuel

9. Identify the forms of energy …
Item A B C D E F G
Answer
Electrical
Thermal
Electromagnetic
Mechanical
Nuclear
Potential
Kinetic

10. Learning Goal: Identify the two general types of energy as kinetic energy and potential energy.
Time to Self-Assess: 5 – Mastered it! 4 – Own it! 3 – Getting there! 2 – So confused! 1 – No clue!