1. I CAN… explain how energy is transferred, transformed, and conserved.

2. Notes: What is Energy?
Energy is the ability to do work or cause matter to change.
Examples of energy in everyday life:
hitting a baseball
holding a book above your head
digesting food
heating water

3. Two Types of Energy: Kinetic Energy Potential Energy

4. Kinetic Energy Kinetic Energy is the energy of motion.
It depends on the mass and speed of a moving object.
Formula: KE = m(v2)/2

5. PARTNER TALK Apply the formula KE = mv2/2 to the following scenarios:
A smart car and a semi-truck are driving down the road at equal speeds. Which has more kinetic energy and why?
Two cars of the same size are driving down the road. One is going 50mph and one is going 75mph. Which one has more kinetic energy and why?
A 1000kg car is driving 80m/s. What is its kinetic energy in Joules?

6. Examples:

7. Potential Energy
Potential Energy is the energy an object has from its position or shape.
Potential energy is stored energy in an object.

8. Examples:

9. Potential Energy
An object with potential energy has the ability to move, change, or do work.
Formula (gravitational potential energy):
PE = weight x height

10. PARTNER TALK
Apply the formula PE = weight x height to the following scenarios:
Mrs. Johnson is going to drop an object on your head. Would you rather it be a ping pong ball or a golf ball? Why?
Why would it hurt more to drop something on your foot from higher up than from closer to your foot?
What is the potential energy in Joules of a 100 N object lifted to a height of 10 meters?

11. How are Potential Energy and Kinetic Energy related?
Energy can be transformed from potential to kinetic energy.
If an object has more potential energy at first, then it will have more kinetic energy when it starts moving.

12. Potential, Kinetic, or Both?

13. Potential, Kinetic, or Both?

14. Potential, Kinetic, or Both?

15. Potential, Kinetic, or Both?

16. Potential, Kinetic, or Both?

17. Potential, Kinetic, or Both?

18. Forms of Energy All energy falls into two categories:
Potential: stored energy and energy of position
Kinetic: motion of waves, electrons, atoms, molecules and substances.

19. Forms of Energy POTENTIAL KINETIC Chemical Nuclear Gravitational
Elastic
Radiant
Electrical
Mechanical
Sound
Thermal

20. 1. Chemical Energy stored in the bonds of atoms and molecules.
Example: Matches, food, batteries

21. 2. Nuclear
Energy stored in the nucleus of an atom. The energy that holds the nucleus together.
Example:
Breaking down Uranium

22. 3. Gravitational Energy of position or height.
Example: two skiers at different heights
Energy of position or height.
Higher = more gravitational energy.

23. 4. Elastic
Example: spring, rubberband
Energy due to a material’s condition. (squeezed together or stretched out)

24. 5. Radiant Electromagnetic energy that travels in waves like light.
Example: Visible Light

25. 6. Electrical
Example: computer, phone
Movement of electrons.

26. 7. Mechanical Movement of a substance from one place to another.
Example: Riding a bike
Movement of a substance from one place to another.

27. 8. Sound Movement of energy through substances in waves.
Example: bell ringing

28. 9. Thermal The vibration or movement of atoms and molecules. Heat.
Example: boiling water
The vibration or movement of atoms and molecules. Heat.

29. What form of Energy?

30. What form of Energy?

31. What form of Energy?

32. What form of Energy?

33. What form of Energy?

34. What form of Energy?

35. What form of Energy?

36. What form of Energy?

37. What form of Energy?

38. What form of Energy?

39. What form of Energy?

40. Energy Conservation/ Transformation
Energy cannot be created nor destroyed. It can only change from one form to another.