Earth's Atmosphere and Weather Unit

Which layer of the atmosphere contains the most water? 

• mesosphere
•  troposphere
•  stratosphere
• thermosphere

The protective layer of ozone gas is located in which layer of Earth’s atmosphere?

• mesosphere
• troposphere
• stratosphere
•  thermosphere

Which best describes what happens to air pressure as altitude increases in the atmosphere?

•  Air pressure becomes less.
• Air pressure becomes greater.
• Air pressure changes
• Air pressure stays the same

Through which processes does water vapor enter the atmosphere?

• precipitation,  condensation
•  condensation, transpiration
• transpiration, evaporation
• precipitation, evaporation 

What form of precipitation forms when cloud temperatures are above freezing, but air temperatures near the surface are below freezing?

• rain
• sleet 
• snow
•  hail

When water vapor at the surface condenses and freezes, what forms?

• frost
•  fog
• dew
• rain

How do clouds help heat the Earth?

• Clouds act as a blanket at night trapping warm air below.
• Clouds reflect sunlight into the atmosphere.
• Clouds absorb sunlight and release solar energy.
• Clouds keep temperatures from changing.  

Which type of cloud is called fog when it forms on the surface of Earth?

•  cumulus
• nimbus
• cirrus
• stratus

These clouds are made of ice crystals and signal nice weather.

• A  cumulus
• A  nimbus
• cirrus
• stratus

Air masses are classified by which two characteristics?

• temperature and air pressure
• air pressure and wind speed
• air pressure and humidity
• temperature and humidity