WeatherChapters1and2Humidity

What is the dew point when the dry-bulb temperature is 12 °C and the wet-bulb temperature is 7 °C?

• 1 °C
• -5 °C
• 28 °C
• 48 °C

Air has a dry-bulb temperature of 2 °C and a wet-bulb temperature of -2 °C, what is the relative humidity?

• 11%
• 20%
• 36%
• 67%

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 useful in measuring relative humidity?

• barometer
• anemometer
• psychrometer
• wind vane

Why can't you see the water vapor in the air?

• There is very little of it.
• It is a clear, colorless gas. 
• It is very far away.
• It only happens at night. 

How does air temperature affect humidity?

• warmer air = lower humidity
  colder air = higher humidty
• temperature does not affect humidity
• colder air = lower humidity
  warmer air = higher humidity
• warm air and cold air = high humidity

The sun heats up surface water, causing evaporation.  The water vapor then rises into the air creating....

• rain
• ice
• fog
• humidity

The amount of water vapor in the air

• Humidity
• Aeration
• Saturation
• Infiltration

If an area is humid, what is it?

• Wet
• Dry
• Solid
• Cold

What does low humidity mean?

• It is cold. 
• It is hot. 
• There is a little evaporated water in the air. 
• There is a lot of evaporated water in the air.