Moisture in the Atmosphere

The process that changes a gas into a liquid

• Evaporation
• Condensation

The temperature at which the air is saturated with water vapor.....

• Humidity
• Condensation
• Dew point

A dry-bulb temperature of 30°C and a wet-bulb temperature of 29°C were recorded at a weather station. What are the relative humidity and the most likely weather conditions?

• Relative humidity is 29% with clear skies
•  Relative humidity is 29% with a good chance of snow
• Relative humidity is 93% with clear skies.
•  Relative humidity is 93% with a good chance of rain.

Which weather instrument is most useful in
measuring relative humidity?

• barometer
• anemometer
• psychrometer
• wind vane

Which type of air has a relative humidity of 100%?

• space
• hot
• dry
• saturated

What is the Dew Point Temperature if the dry-bulb temperature on your sling psychrometer is 20ºC and the wet-bulb temperature is 15ºC?

• 14ºC
• 12ºC
• 10ºC
• -18ºC

_____________ is the temperature to which air must be cooled to reach saturation.

• Humid point
• Temperature index
• Relative Humidity
• Dew Point

The amount of water vapor in the atmosphere compared to how much it could hold.

• Saturation
• Vaporicity
• Humidity
• Relative Humidity

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

Which of these is an example of precipitation?

• snow
• air
• clouds
• vapor