Unit Test Study Guide: Atmosphere & Weather

What is the condition of Earth's atmosphere at a particular time and place called?

• Weather

• Climate

• Temperature

• Humidity

What percentage of Earth's atmosphere is made up of nitrogen?

• 78%

• 21%

• 1%

• 0.03%

A front in meteorology is:

• a boundary separating two masses of air of different densities

• a type of cloud formation

• a measurement of atmospheric pressure

• a type of precipitation

The diagram shows how Earth’s atmosphere traps heat from the sun. What is the process called?

• Conduction

• Greenhouse Effect

• Precipitation

• Scattering

Which weather tool was used to take these air pressure measurements?

• Anemometer

• Barometer

• Hygrometer

• Thermometer

A student used a psychrometer and found that the relative humidity outside was 60%. What does this measurement mean?

• The atmosphere was made up of 60% water when the measurement was taken.

• The air was holding 60% of the water vapor that it could possibly hold.

• Clouds covered approximately 60% of the sky when the measurement was taken.

• The temperature was 60% of the normal value for that day and time.

What two conditions are required for clouds to form?

• Cooling of the air and the presence of wind.

• Cooling of the air and the presence of particles in the air.

• The presence of particles in the air and a temperature above 0°C.

What are the temperature and humidity of air mass B?

• Cold and dry

• Warm and moist

• Cold and moist

• Warm and dry

Which name would a meteorologist give to air mass A?

• Continental Polar

• Continental Tropical

• Maritime Polar

• Maritime Tropical

A rapidly moving cold air mass meets a slowly moving warm air mass and forms a front. What will most likely occur at this front?

• The two air masses will mix together and become the same temperature.

• Warm air will slide under the cold air. The cold air will rise and get warmer.

• The less dense warm air will sink and cool. Clouds will form.

• Cold air will slide under the warm air. Warm air will rise and cool. Clouds will form.