Dewpoint and Relative Humidity

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.

Tags

NGSS.MS-ESS2-5

As the difference between the Air temperature and Dewpoint temperature decrease (get closer to zero), the relative humidity will...

• Increase and the chances of precipitation increases

• Increase and the chances of precipitation decreases

• Decrease and the chances of precipitation increases

• Decrease and the chances of precipitation decreases

Tags

NGSS.MS-ESS2-5

A psychrometer is used to determine which weather variables?

• wind speed and direction

• % of cloud cover and could height

• air pressure and air temperature

• relative humidity and dew point

What is the relative humidity of the air when the dry-bulb temperature is 4°C and the dewpoint is –4°C?

• 42 %

• 46%

• 51%

• 56%

What is the dewpoint when the dry bulb temperature is 20°C and the relative humidity is 17%?

• -5 C

• -2 C

• 11 C

• 15 C

What is the relative humidity when the dry-bulb temperature is 16°C and the wet-bulb temperature is 14°C?

• 90%

• 80%

• 14%

• 13%

An observer measured the air temperature and the dewpoint and found the difference between them to be 12°C. One hour later, the difference between the air temperature and the dewpoint was found to be 4°C. Which statement best describes the changes that were occurring?

• The relative humidity was decreasing and the chance of precipitation was decreasing.

• The relative humidity was decreasing and the chance of precipitation was increasing.

• The relative humidity was increasing and the chance of precipitation was decreasing.

• The relative humidity was increasing and the chance of precipitation was increasing.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Base your answer on the graphs below and on your knowledge of Earth science. The graphs show air temperatures and dewpoints in °F, and wind speeds in knots (kt) from 2:00 a.m. to 11:00 p.m. at a certain New York State location. What is the approximate humidity at 6pm?

• 30%

• 45%

• 75%

• 100%

Tags

NGSS.MS-ESS2-5