The _________ is an envelope of gases that surrounds the Earth.
Includes nitrogen, _______, carbon dioxide, water vapor and other gases
the atmosphere keeps ______ on the planet
Air _________ is the force of air pushing down on the Earth.
A ________ measures air pressure
Air pressure is ______ at sea level than in the mountains.
_________ is how much air is in a certain place (altitude)
Density = ________ / volume
Air at sea level is _____ than air in the mountains.
a. The troposphere is the lowest layer
The _______ is the lowest layer
The troposphere is where ______- happens.
The _______ is the 2nd layer.
The ________ layer absorbs ultraviolet radiation
The __________ is the third layer
_______ burn up in the atmosphere
The __________ is the top layer
_____________ are found in the thermosphere
the atmosphere gives us protection from _______ and cosmic ________