1. Air Pressure drives the wind and creates the weather. Air Pressure drives the wind and creates the weather. Copyright © 2010 Ryan P. Murphy

2. Warm air rises, cool air sinks. Warm air rises, cool air sinks. Warm is low pressure, Cold is High Pressure. Warm is low pressure, Cold is High Pressure. Copyright © 2010 Ryan P. Murphy

3. Warm air rises, Warm air rises, Warm is low pressure, Cold is High Pressure. Warm is low pressure, Cold is High Pressure. Copyright © 2010 Ryan P. Murphy

4. Warm air rises, Warm air rises, Warm is low pressure, Cold is High Pressure. Warm is low pressure, Cold is High Pressure. Copyright © 2010 Ryan P. Murphy

5. Warm air rises, cool air sinks. Warm air rises, cool air sinks. Warm is low pressure, Cold is High Pressure. Warm is low pressure, Cold is High Pressure. Copyright © 2010 Ryan P. Murphy

6. Warm air rises, cool air sinks. Warm air rises, cool air sinks. Warm is low pressure, Warm is low pressure, Copyright © 2010 Ryan P. Murphy

7. Warm air rises, cool air sinks. Warm air rises, cool air sinks. Warm is low pressure, Cold is High Pressure. Warm is low pressure, Cold is High Pressure. Copyright © 2010 Ryan P. Murphy

8. Which of the pictures is High Pressure?

11. Which of the pictures is Low Pressure?

15. Which letter below would have warm surface temperatures? A B C D E

16. A B C D E

17. Which letter below would have cooler atmospheric temperatures? A B C D E

18. Which letter below would have cooler atmospheric temperatures? C and E A B C D E

20. Cold Front: Form where cold air moves towards warm air. Cold Front: Form where cold air moves towards warm air. Creates rain storms. Creates rain storms. Copyright © 2010 Ryan P. Murphy

21. Cold Front: Form where cold air moves towards warm air. Cold Front: Form where cold air moves towards warm air. Creates rain storms. Creates rain storms. Copyright © 2010 Ryan P. Murphy

22. Cold Front: Form where cold air moves towards warm air. Cold Front: Form where cold air moves towards warm air. Creates rain storms. Creates rain storms. Copyright © 2010 Ryan P. Murphy

24. Direction of travel

27. Cold

28. Warm

29. Cold Warm

30. Cold Warm

31. Cold Warm

32. Cold

35. Warm

36. Cold Warm

37. Cold Warm

38. Cold Warm

42. “Honey, I think it’s time to get our stuff together.”

43. Cold Air

44. Warm Air

45. Cold Air Warm Air Rain

47. Video (Optional) Cold Front Time Lapse. –http://www.youtube.com/watch?v=i8zq0UXPLX0http://www.youtube.com/watch?v=i8zq0UXPLX0

48. Warm Front: Form where warm air moves towards cold air. Warm Front: Form where warm air moves towards cold air. Copyright © 2010 Ryan P. Murphy

51. Warm

52. Cold

53. Warm Cold

54. Warm Cold

55. Warm Cold

56. Warm

57. Challenge Activity! Which letter best represents a warm front? CD B A E F

58. CD B A E F

59. Challenge Activity! Which letter best represents a cold front? CD B A E F

60. CD B A E F

61. Challenge Activity! Which letter best represents high pressure? CD B A E F

62. CD B A E F

63. Challenge Activity! Which letter best represents low pressure? CD B A E F

64. CD B A E F