Weather Study Guide

Air Mass
Air Mass
a body of air that has about the same temperature and moisture throughout
Cold Front
Cold Front
the dense, cold air pushes under the existing warm air—makes short-lived but violent thunderstorms
Warm Front
Warm Front
the light, warm air slides in over the existing cold air—makes long-lived rain and drizzle
How much of our atmosphere is made up of Nitrogen?
78%
What is the Nitrogen Cycle?
What is the Nitrogen Cycle?
A process that keeps Nitrogen constant in our atmosphere: Air to bacteria to soil to animals to waste back to air.
What is the Ozone Layer?
What is the Ozone Layer?
The layer of O3 that absorbs harmful ultraviolet radiation from Sun.
Where is the Troposphere?
Where is the Troposphere?
It is closest to the Earth.
What is the Greenhouse effect?
What is the Greenhouse effect?
Heat from the Sun can go through the atmosphere and warm Earth, but gets trapped and doesn’t go back out.
Name 4 Greenhouse gases.
Methane, Carbon Dioxide, and Water Vapor.
What is Adiabatic Cooling?
What is Adiabatic Cooling?
The process by which the temperature of an air mass decreases as the air mass rises and expands.
What is a Cirrus cloud?
What is a Cirrus cloud?
The highest clouds in the sky, composed of ice crystals and has the highest altitude of any cloud in the sky.
What are isotherms?
What are isotherms?
They connect areas of equal temperature on a surface map.
What are isobars?
What are isobars?
They connect areas of equal pressure on a surface map.
What instrument measures pressure?
What instrument measures pressure?
What is necessary for clouds to form?
What is necessary for clouds to form?
Clouds form when there is a condensation nuclei, and when air rises, cools, and condenses.
Condensation Nuclei
solid particles in the atmosphere, such as ice and dust, that provide the surfaces for clouds to form
Station Model
Station Model
shows weather conditions at a specific location, using a combination of symbols on a map
Describe the weather that precedes a warm front.
The previously clear/sunny skies become cloudy. Cirrus clouds begin to roll in, followed by cumulus and then status clouds.