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Weather.

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Presentation on theme: "Weather."— Presentation transcript:

1 Weather

2 Amount of rain depends greatly on

3 surface temperature of the ocean

4 Why does warm ocean water result in more rain?

5 Warm water evaporates faster than cooler water and clouds form over warmer water

6 What causes wind to form?

7 The sun heats the atmosphere unevenly

8 What happens to the water vapor when it moves to cooler air?

9 It condenses and forms rain

10 What would happen if there was no wind created over the oceans?

11 The rain would just fall back down over the ocean area.

12 The study of weather

13 meteorology

14 Why is cold air denser?

15 The molecules of water vapor are closer together and they apply more pressure

16 This weather instrument measures air temperature.

17 thermometer

18 This weather instrument measures air pressure.

19 barometer

20 This weather instrument measures wind speed.

21 anemometer

22 This weather instrument measures humidity.

23 hygrometer

24 This weather instrument measures the amount of rain that has fallen over a period of time.

25 rain gauge

26 This weather instrument measures the direction wind is blowing.

27 wind vane or wind sock

28 Higher humidity indicates a greater chance of this type of weather.

29 rain

30 This type of air has lower humidity and this indicates less chance of rain.

31 Cooler air

32 cooler air is coming, which means less

33 rainfall

34 When a barometer rises it shows more

35 Pressure Which means more rainfall

36 If an anemometer shows a change in this, it may mean a change in weather is coming.

37 wind speed

38 If a hygrometer shows an increase in this, it often means it is about to rain.

39 humidity

40 How does knowing the direction of wind help forecast weather?

41 The future weather will probably be what is behind the direction of the wind.

42 large body of air that has the same temperature and humidity throughout

43 air mass

44 produces winds

45 changing air masses

46 Most air masses over the United States move in this direction.

47 west to east

48 the border in which two air masses meet, and usually result in weather changes

49 front

50 What happens when water vapor is cooled and condensed rapidly at a front?

51 causes heavy rainfall and thunderstorms

52 This symbol indicates a warm front on a weather map.

53 Red line with half circles

54 This symbol indicates a cold front on a weather map.

55 Blue line with triangles

56 This symbol indicates high-pressure on a weather map.

57 H

58 This symbol indicates low-pressure on a weather map.

59 L

60 High pressure indicates this type of weather.

61 fair

62 Low pressure indicates this type of weather.

63 stormy

64 the pattern of weather over a long time

65 climate

66 the condition of the atmosphere at a particular time

67 weather


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