Understanding Humidity and Dew Point

What is the definition of relative humidity?

• The amount of water vapor in the air compared to the maximum amount the air can hold at a given temperature.

• The temperature at which air becomes saturated and water vapor condenses.

• The total amount of water vapor present in the air.

• The change in temperature with altitude.

Which instrument is used to measure relative humidity?

• Thermometer

• Barometer

• Hygrometer

• Anemometer

If the air temperature is 25°C and the dew point is 15°C, what is the relative humidity?

• 20%

• 40%

• 60%

• 80%

How does relative humidity change with temperature if the amount of water vapor in the air remains constant?

• It increases as temperature increases.

• It decreases as temperature increases.

• It remains constant regardless of temperature changes.

• It fluctuates randomly with temperature changes.

What is the dew point?

• The temperature at which air pressure is highest.

• The temperature at which air becomes saturated and water vapor condenses.

• The temperature at which relative humidity is 100%.

• The temperature at which the air is completely dry.

Which of the following best describes the effect of high humidity on weather?

• It leads to cooler temperatures.

• It causes increased evaporation rates.

• It can make temperatures feel warmer than they actually are.

• It results in clearer skies.

What is the relationship between dew point and relative humidity?

• Higher dew points indicate lower relative humidity.

• Lower dew points indicate higher relative humidity.

• Dew point is unrelated to relative humidity.

• Higher dew points indicate higher relative humidity.

Which of the following is a simple procedure to calculate the dew point?

• Subtract the air temperature from the relative humidity.

• Use a dew point calculator or chart with temperature and relative humidity.

• Add the air temperature to the relative humidity.

• Multiply the air temperature by the relative humidity.

What happens to relative humidity when the air temperature drops but the amount of moisture in the air remains the same?

• It increases.

• It decreases.

• It remains the same.

• It fluctuates randomly.

Which of the following instruments can be used to measure both temperature and humidity?

• Thermometer

• Psychrometer

• Barometer

• Anemometer