TOPIC : Energy AIM : Describe the five forms of energy. Do Now : Ditto – Mixtures #’s 1 – 5

1. TOPIC: Energy AIM: Describe the five forms of energy. Do Now: Ditto – Mixtures #’s 1 – 5 Take out your periodic table activity HW: Periodic Table Activity due tomorrow CL Phases and Phase changes due Monday

2. Group (Family) 8, Period 5 = Ru 2. Group (Family) 14, Period 4 = Ge 3. Group (Family) 18, Period 6 = Rn 4. Group (Family) 2, Period 4 = Ca

6. Mechanical Energy Energy in moves an object

7. Examples: • Energy used to put a book on a shelf • Energy used to turn a car key

13. Chemical Energy Energy stored in the chemical composition of matter H H O Bond

14. Bonds broken chemical energy released

15. Examples: • Released when wood or gasoline burns • Stored in food

16. Batteries, unlit match

18. Thermal Energy Energy in moving particles of matter Heat Energy

19. Atoms move faster  more thermal energy produced

20. Examples: • Can cause phase changes SOLID GAS

21. Can result from friction

22. Almost everything changes to heat energy.

23. Electromagnetic Energy Transmitted through space in the form of electromagnetic waves

24. Ex: visible light, X-rays, microwaves

25. Electrical Energy Produced when we cause electrons to move from one place to another

26. Examples: • Electricity moving through a wire • Lightening bolts • Electrical coils on a stove

27. Nuclear Energy Energy stored in nucleus of an atom

28. When nuclei fuse together or break apart http://www.youtube.com/watch?v=91XW8AkjG2Y

29. Advantages of nuclear energy • Power plants could still produce electricity after coal and oil become scarce

30. Power plants need less fuel than ones which burn fossil fuels. (One ton of uranium produces more energy than is produced by several million tons of coal or several million barrels of oil)

31. Do not produce air pollutants & CO2

32. Disadvantages of nuclear energy • Nuclear explosions produce radiation. • harms body cells  illness or death • Reactor disaster = meltdown. • Fission reaction goes out of control  nuclear explosion • http://www.youtube.com/watch?v=TLBRT_OY2No

33. Chernobyl, Ukraine, 1986 = reactor core overheated during safety test. Materials in the core caught fire and caused a chemical explosion that blew a hole into the reactor. Radiation was carried by the wind. Twenty-eight people died of radiation sickness.

34. Fukushima nuclear accident resulted in a meltdown of 3 of the plant's 6 nuclear reactors. The failure occurred when the plant was hit by the tsunami triggered by the Tōhoku earthquake. Although no short term radiation exposure fatalities were reported, some 300,000 people evacuated the area, 15,884 (as of 10 February 2014) people died due to the earthquake and tsunami, and as of August 2013 approximately 1,600 deaths were related to the evacuation conditions, such as living in temporary housing and hospital closures.

35. The World Health Organization indicated that evacuees were exposed to so little radiation that radiation-induced health impacts are likely to be below detectable levels,[17] and that any additional cancer risk from radiation was small—extremely small, for the most part—and chiefly limited to those living closest to the nuclear power plant.

36. Water used to cool power plants • excess heat may kill organisms in streams & rivers it’s released into

37. Wastes release radiation • Cannot be thrown away like garbage • Stored in special cooling pools at the nuclear reactors

38. Mechanical Mechanical

39. Flashlight = converts chemical energy (stored in the battery) to electrical energy to light the bulb. The bulb converts the electrical energy to electromagnetic energy. Toaster = converts electrical energy into thermal energy.

41. Car engine = converts the chemical energy stored in the gasoline into mechanical and thermal energy. Radio = converts electrical energy into sound energy. Human body = converts chemical energy stored in food into mechanical energy for a beating heart and moving muscles.

42. Let’s summarize… • Identify the 5 forms of energy. • Identify another name for heat energy. • Describe what occurs to particles as temperature increases. • Where is chemical energy found? How is it released? • How is electromagnetic energy transmitted? Give one example. • Where is nuclear energy stored? • How is electrical energy produced?

43. Energy appears in many forms. Which form of energy is lightening? • Magnetic • Mechanical • sound • Electrical

44. A family is moving from Pennsylvania to Connecticut. As the moving van burns gasoline, it converts • chemical energy into mechanical energy • kinetic energy into potential energy • thermal energy into electrical energy • mechanical energy into kinetic energy

45. When an electric current flows through a metal filament of a light bulb, the electrical energy is converted into • heat energy, only • heat and light energy • light and motion energy • light energy only

46. Which energy source was developed through the invention of the atomic bomb? • Nuclear • Geothermal • Solar • Hydropower

47. An unlit match contains • Thermal energy • Electrical energy • Chemical energy • Nuclear energy

48. Which device produces mechanical energy? • A battery • A light bulb • An electric motor • A solar cooker

49. A song is playing on the radio. Which best describes the change in the flow of energy? • Electrical energy  light energy • Electrical energy  sound energy • Sound energy  light energy • Sound energy electrical energy

50. A bicycle rider ate breakfast before the ride. Which energy transformation occurred during the bike ride? • Mechanical to chemical energy • Chemical to mechanical energy • Mechanical to nuclear energy • Nuclear to mechanical energy