L 4.1: Elements of Weather

Front

What is a barometer used to measure?

Back

Air pressure.

Front

True or False: Relative humidity is the amount of water vapor in the air compared to the amount needed to reach saturation.

Back

TRUE.

Front

What does visibility measure in the atmosphere?

Back

The transparency of the atmosphere.

Front

True or False: When air is saturated, more water evaporates into the air than condenses back into the water.

Back

FALSE.

Front

What tool is used to measure wind speed?

Back

Anemometer.

Front

What is humidity?

Back

The amount of water vapor present in the air.

Front

What is the difference between absolute humidity and relative humidity?

Back

Absolute humidity is the actual amount of water vapor in the air, while relative humidity is the percentage of water vapor in the air compared to the maximum amount the air can hold at that temperature.

Front

What instrument measures temperature?

Back

Thermometer.

Front

What is the role of a psychrometer?

Back

It measures relative humidity using two thermometers, one dry and one wet.

Front

What is air pressure?

Back

The force exerted by the weight of air above a given point.