Semester 2 Final Exam Study Guide

The atmosphere is composed of

• mostly oxygen
• all hydrogen
• a mixture of gases
• H20

Low air pressure moves towards high air pressure.

• true
• false

Lines on a weather map that connect equal points of air pressure

• Dew point
• Fronts
• Air masses
• Isobars

High pressure creates sunny, clear skies.

• True
• False

The temperature at which air becomes saturated

• Humidity
• Front
• Dew Point
• Cold Front

Low pressure areas would likely have 

• cloudy weather
• clear weather
• sunny weather
• storms

Which type of cloud indicates fair weather?

• nimbus
• cumulus
• cirrus
• cumulonimbus

During a land breeze, the air over the sea rises due to it's low pressure.

• True
• False

Oxygen makes up _______ percent of the atmosphere.

• 78
• 30
• 21
• 1

As altitude increases, pressure __________.

• increases
• decreases
• stays the same
• rises