Which layer of the atmosphere contains the ozone layer?

• troposphere
• stratosphere
• mesosphere
• thermosphere

Which process in the water cycle forms clouds?

• precipitation
• evaporation
• sublimation
• condensation

Which layer does weather occur in?

• thermosphere
• troposphere
• stratosphere
• ionosphere

The approximate percentage of fresh water on the Earth is...

• 97
• 66
• 33
• 3

Most of Earth's fresh water is in the form of ...

• Salt water
• glaciers
• lakes
• rivers

Which of the following is the distance above sea level?

• precipitation
• evaporation
• elevation
• altitude

As altitude increases, what happens to air pressure?

• increases
• remains constant
• decreases
• stays the same

The trapping of heat do to gases in the atmosphere...

• coriolis effect
• El Nino
• Greenhouse effect
• La Nina

Air pressure is greatest:

• closer to Earth
• farther from Earth

This severe weather involves lightning, rain, and possibly hail

• thunderstorm
• tornado
• hurricane
• blizzard