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Study Guide Test 12/16

Study Guide Test 12/16. Topics Include: Relative Humidity Dew Point Cloud Formation Air Masses Fronts.

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Study Guide Test 12/16

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  1. Study GuideTest 12/16 Topics Include: Relative Humidity Dew Point Cloud Formation Air Masses Fronts

  2. Make Sure You Understand:Relative humidityis the amount of moisture (water vapor) in the air compared to the amount of moisture the air can hold at that temperature.When the air is Saturated, it has 100% relative humidity.Dew Point is when air cools to the temperature at which air is saturated. Assuming the amount of water vapor in the air stays the same… • If the temperature increases, then the relative humidity decreases. • If the temperature decreases, then the relative humidity increases.

  3. What is a cloud? • A cloud is made of water droplets. • Clouds form when warm air rises and cools

  4. Be able to answer the following:

  5. Key Terms • Precipitation - water that falls to the Earth’s surface as rain, snow, sleet, or hail • Condensation - process in which water vapor cools and turns to liquid • Weather- condition of the atmosphere at a certain time and place • Humidity- the amount of moisture in the air

  6. Key Terms, continued • Anticyclone- area of high pressure where air moves apart and sinks • Cyclone- area of low pressure where air masses meet and rise • Dew Point- the temperature at which a gas condenses into a liquid

  7. Measuring Weather • Anemometer - measures wind speed • Barometer - measures air pressure • Radar - locates precipitation • Thermometer - measures air temperature • Windsock - measures wind direction

  8. Air Masses A. mP B. cP and/or cA C. mP D. cT E. mT F. mT G. What is the origin of each of the 3 mT air masses? The Pacific Ocean, the Gulf of Mexico, and the Atlantic Ocean

  9. Air MassesAn air mass is named for it’s temperature and moisture level.When two air masses meet the warm air mass will rise and the cool air mass will sink. Continental Maritime Polar Tropical Dry Wet Cold Warm means means means means

  10. Air Masses An air mass is a body of air. • A Continental Polar (cP) air mass brings cold, dry weather. • A Maritime Polar (mP) air mass brings cold, moist (wet) weather. • A Continental Tropical (cT) air mass brings dry and warm weather. • A Maritime Tropical (mT) air mass brings warm, moist (wet) weather.

  11. FrontsFronts are the boundary between different air masses. • Cold fronts create short, heavy, violent periods of rain followed by cool fair weather • Warm frontsoccur when warm air rises and condenses into long areas of clouds which bring gentle rain or snow followed by warmer weather • Stationary frontscreate clouds and fog at the site of the front and can bring days of rain or snow • Occluded frontsoccur when warm air is cut off from the ground which can bring heavy wind and precipitation

  12. Make sure you know:1. Which symbol belongs to which front.2. The color of each front symbol.3. The type of weather does each front bring. Warm front (red) Occluded front (purple) Cold front (blue) Stationary front (red and blue)

  13. Topics to Review • Dew Point Lab • Words to know: Dew Point, Saturated, Condensation, Water Vapor • High Pressure System • Low Pressure System

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