2. Water vapor (gas) in the air cools and becomes liquid water or ice crystals. (condensation) How do clouds form?

3. Usually, clouds form in higher altitudes.

4. FOG Sometimes they form low to the ground.

5. Clouds form in low atmospheric pressure, because there isn’t as much room for water when the air particles are tight (dense) in high pressure.

6. Clouds are named by their location and their appearance.

8. Do you know the cloud root words? Cumulus means heap Stratus means layer Cirrus means curl of hair Nimbus means rain

9. Make a table Cloud NameDescriptionType of Weather Picture Stratus Nimbostratus Cumulus Cumulonimbus Cirrus

10. STRATUS Sheets of low, grey, layers of clouds that bring light snow, rain, or drizzle.

11. NIMBOSTRATUS Thicker layers than stratus clouds that completely block out the sun. They cause steady longer periods of rain or snow.

12. CUMULUS White and puffy clouds that usually mean good weather or if large and numerous they are capable of bringing heavy rain..

13. CUMULONIMBUS Dark, towering clouds that are also called “thunderheads”. These clouds produce heavy rain, thunder, and lighting.

14. CIRRUS Thin, featherlike clouds that are made of ice crystals high in the atmosphere. Usually means a fair weather day or changing weather

15. Make a table Cloud NameDescriptionType of Weather Picture StratusLow, Sheets, gray color Light rain NimbostratusThicker layers that block out sun, gray Steady, longer periods of rain or snow CumulusWhite and puffyGood weather Or if numerous heavy rains CumulonimbusDark towering called “thunderheads” Heavy rain, thunder or lightning CirrusThin, featherlike, made of ice crystals Fair weather or changing weather

16. Cloud Stamps

17. Do You Know Your Clouds? :

18. Cirrus icy curls high in the sky

19. Do You Know Your Clouds? :

20. Fog low thin sheets

21. Do You Know Your Clouds? #7 :

22. #7: Cumulonimbus vertical towers of rain clouds

23. Do You Know Your Clouds? :

24. Nimbostratus thick layers of rain

25. Do You Know Your Clouds?

26. Cumulus widely spaced small cloud masses

27. If you could be a cloud, which would yu be? WHY? Cloud Graph Directions: Recreate this cloud graph. For all of the cloud types included in the notes- 1. add a description of the cloud’s appearance 2. what type of weather to expect

28. The End

29. Weather Instruments

30. Thermometers This also has a Hygrometer, which measures humidity.

31. A Thermometer measures air temperature. A Thermometer works because matter expands when heated. Most thermometers are closed glass tubes containing liquids such as alcohol. When air around the tube heats the liquid, the liquid expands and moves up the tube. A scale then shows the actual temperature of the air. Units: F or C

32. Barometers Torricelli’s Barometer

33. A Barometer measures air pressure. An Italian scientist named Torricelli built the first barometer in 1643. People still use barometers based on Torricelli's design to measure air pressure. Unit: Millibar (Mb)

34. Psychrometers See the wet “wick” on one of these bulbs. One of these bulbs should have a piece of wet cheesecloth on it.

35. A Psychrometer measures relative humidity. Two thermometers are used in a Psychrometer. A wet cloth covers the end of one of the thermometers. Water evaporates from this cloth, causing the temperature on that thermometer to be different from the other.

36. A Psychrometer If the surrounding air is dry, more moisture evaporates from the wick, cooling the wet-bulb thermometer more so there is a greater difference between the temperatures of the two thermometers. If the surrounding air holds as much moisture as possible - if the relative humidity is 100% - there is no difference between the two temperatures. Unit: %

37. Anemometers

38. An Anemometer measures wind speed. The cups catch the wind, turning a dial attached to the instrument. The dial shows the wind speed. Wind speed can be estimated without special tools by observation. Unit: MPH

39. Windsocks

40. A Windsock is used at airports to indicate wind direction for takeoffs and landings. They help the pilots select the proper runway so that they can take off and land into the wind. Units: N, S, E W NW, NE, etc.

41. Wind Vanes Most airport Wind Vanes have Anemometers also.

42. A Wind Vane is used to measure wind direction. It spins on a rod and points in the direction from which the wind comes. Unit: N, S, E, W

43. Hygrometers

44. A Hygrometer is an instrument used to measure the humidity of the air. A mechanical Hygrometer uses human or horse hairs which stretch as they absorb moisture. Unit: %

45. Rain Gauges

46. A Rain or Snow Gauge is used to measure amount of rainfall/snowfall. An official Rain Gauge consists of a large cylinder with a funnel and a smaller measuring tube inside. Unit: Inches, Feet

47. Weather Balloons Sometimes weather balloons land in the oddest places!

48. A Weather Balloon measures weather conditions higher in the atmosphere. Measures temperature, air pressure, wind speed and direction

49. A Weather Satellite is able to photograph, track, and measure the conditions of large-scale air movements. A meteorologist then compiles and analyzes the data with the help of computers. NOAA weather satellite launched in 2005.

50. Weather Satellites Weather Satellite Image Tiros 1 - 1965 First usuable Tiros 1 image NOOA-M measures information about Earth radiation, sea and land surface temperature, atmospheric vertical temperature, water vapor, and ozone in the troposphere and stratosphere.

51. Radar ( Radio Detection And Ranging) 1940s – World War II (to detect enemy planes) Microwave energy waves are sent out. The wave bounces off solid or liquid particles. Information returns as blotches called radar “echoes.” They help measure and track precipitation and storms.

52. Weather Prediction All these instruments are used by meteorologists to report the current and predict the future weather. The End.

53. Wind Packet Read the provided information Answer the multiple choice question on a separate sheet of paper (only write the letter for each answer) YOU MUST write the paragraph # and sentence # next to each answer. You only need to write the letter of each answer.