Atmosphere and its Layers
Instruments
Clouds and Fog
Air Mass
Severe weather and Fronts
100

A mixture of gasses, primarily nitrogen, oxygen, and argon, that surrounds Earth

What is the Atmosphere 

100

An instrument used to determine the direction of the wind 

What is a Wind vane

100

A cloud that form at low altitudes with a top that resembles cotton balls 

What is Cumulus clouds 

100

A body of air with horizontally uniform temperature, humidity, and pressure

What is Air Mass

100

The front edge of advancing warm air mass that replaces colder air with warmer air 

What is a Warm front 

200

The layer of the atmosphere that contains the ozone layer.

What is the Stratosphere 

200

An instrument that measures and indicates temperature

What is a Thermometer 

200

A cloud that has the highest altitude of any cloud in the sky 

What is Cirrus clouds 

200

An air mass that originates in Canada and brings cold, dry air 

What is Continental polar 

200

A brief, heavy storm with rain, wind, lightning, and thunder 

What is a Thunderstorm 

300

The coldest layer of the atmosphere

What is the Mesosphere 

300

An instrument used to measure wind speed 

What is an Anemometer 

300

A cloud that covers large areas of sky and often block out the sun

What is Stratus clouds 

300

An air mass that originates in U.S. southwest and brings warm, dry air 

What is Continental tropical 

300

The front edge of a moving mass of cold air that pushes beneath a warmer air mass like a wedge 

What is a Cold front 

400

The uppermost layer of the atmosphere and it includes the ionosphere

What is the Thermosphere

400

An instrument that measures atmospheric pressure by registering the changes in the bending out of the sides of a sealed metal container

What is an Aneroid barometer 

400

A fog that results from the nightly cooling of Earth 

What is Radiation fog 

400

An air mass that originates in North Atlantic and North Pacific areas and brings cold, moist air 

What is Maritime polar 

400

A destructive, rotating, funnel-shaped column of air with high wind speeds 

What is a Tornado 

500

The lowest layer of the atmosphere and is the level where all weather conditions exist 

What is the Troposphere 

500

An instrument that measures atmospheric pressure by registering changes in the level of mercury inside a tube 

What is a Mercurial barometer 

500

A fog that forms along coasts when warm, moist air moves across a cold surface 

What is Advection fog 

500

An air mass that originates in southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico, or Pacific Ocean and brings warm, moist air 

What is Maritime tropical 

500

A severe storm that develops over tropical oceans, whose strong winds spiral in toward the low-pressure storm center 

What is a Hurricane 

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