Weather and Atmosphere

This layer starting about 7 miles above sea level is more dry and less dense.  Aircraft normally fly in this layer to escape turbulence.

• stratosphere
• thermosphere
• mesosphere

This layer is the closest to the earth which is often called the "lower atmosphere."

• exosphere
• troposphere
• ozone layer

This layer ranges from about 30 to 50 miles above sea level which contains chemicals that absorb energy from the sun.

• thermosphere
• mesosphere
• ionosphere

The majority of the atmosphere contains which gas?

• oxygen
• carbon dioxide
• nitrogen

Types of precipitation that fall to the ground are rain, snow, sleet, and ___________.

• water vapor
• cats and dogs
• hail

High pressure causes air to __________ while low pressure causes air to ________.

• sink, rise
• rise, sink
• rise, also rise

A __________ is the boundary separating air masses of different densities.

• line
• front
• boundary

High-Level Clouds: Usually found at greater than 20,000 ft. include clouds such as Cirrostratus and __________.

• Cirrus
• Cumulus
• Nimbostratus

High pressure areas cause sunny weather; low pressure areas cause rain and storms so a tropical depression would be considered a __________________________.

• high pressure system
• low pressure system

What do the red semi-circles and the blue triangles represent in the following image?

• warm front
• cold front
• stationary front