1. Changing Forms of Energy Chapter 14

2. Energy Energy- the ability to do work or cause a change It can change an objects motion, color, shape, temperature, or other qualities It cannot be created or destroyed, but can be transferred to other objects

3. Examples of Energy Transfer A lamp changes electrical energy into light energy Gasoline releases a chemical energy that moves a car Other kinds of energy: Sound, light, electricity, magnetism, chemical, nuclear, mechanical, thermal

4. Kinetic and Potential Energy Kinetic: Energy due to motion Potential: Energy that is not causing any changes now, but could cause changes in the future Read pages 448- 451

5. http://www.youtube.com/watch?v=T5WJoup-RD8

6. Potential and Kinetic Energy Potential – Water behind a dam – Battery Kinetic – Water moving across turbine blades

7. A cute picture!

8. 4 Main Types of Energy Chemical Energy Heat Energy Light Energy Mechanical Energy

9. Chemical Energy A kind of potential energy Energy caused by chemical reactions Examples: – Cooking food – Burning something – Batteries – Matches

10. Mechanical Energy Mechanical energy is matter in motion. An airplane soaring through the sky has mechanical energy just like the wind or a flowing river. Sound is another type of mechanical energy. Other examples: compressed springs, stretched rubber bands, bow and arrow, hammer and nail

11. Thermal (Heat) Energy The total of all the kinetic and potential energy of the atoms in an object When any forms of matter gets warmer, the object’s thermal energy increases

12. Thermal (Heat) Energy Energy pushed into motion by heat Examples: – Insulation – Refrigerators – Air conditioners – The Sun – Stove

13. Conduction, Convection, and Radiation Read page 465 in your book

14. Conduction The flow of heat between objects that are touching

15. Convection The movement of warm liquids or gases to cooler areas

16. Convection

17. Radiation The movement of energy by electromagnetic waves

19. Light Energy Travels in waves It is Electromagnetic Radiation – a combination of electrical and magnetic energy Look at the pictures on page 458 & 459

20. Light Energy Light energy comes from the Sun. Plants use it to make food and scientists use it to create lasers. Examples: – Light bulb – Fire – The Sun – Flashlight – Firefly/Lightning bug

21. Let’s look at how lenses can bend light!

22. Concave and Convex Lenses

23. Concave Lens Light is bent outward Makes objects look smaller

24. Convex Lens Bends light rays to make objects look larger Thickest in the middle Magnifying glass is one example

25. Here’s a short word from our friend, Bill! http://www.youtube.com/watch?v=fD1544 bM_c4 http://www.youtube.com/watch?v=fD1544 bM_c4

26. Major Parts of the Eye

27. Light Moving Through the Eye https://www.youtube.com/watch?v=syaQgmxb5i0

28. Light and Color http://www.youtube.com/watch?v=AD1Xic2mn0U

37. Let your brain rest while you look at this adorable walrus!

38. http://studyjams.scholastic.com/studyjams/jams/science/matter/energy-and- matter.htm

39. Energy http://www.youtube.com/watch?v=btLU2lb3-xs

40. Sound Energy Sound is a wave of vibrations that spreads from its source Frequency- how fast particles are vibrating Read page 454 and 455 to yourself How does your ear work? – http://www.youtube.com/watch?v=HMXoHKw WmU8 http://www.youtube.com/watch?v=HMXoHKw WmU8

41. Sound Energy http://www.youtube.com/watch?v=lTetdgpu7MU

42. Now, Let’s Look at a Cute Picture!