Atmosphere		The pressure exerted by the atmosphere on all objects within it
Atmospheric pressure		The region of the atmosphere above 460 km
Barometer		The region of the atmosphere between 80 km & 460 km
Exosphere		Energy that is being transferred
Heat		The region of the atmosphere that spans 48 km to 80 km (50 mi)
Heterosphere		The region of the atmosphere that spans 11 km to 48 km (30 mi)
Homosphere		The upper layer of earth's atmosphere - above 80 km (50 mi) above sea level
Ionosphere		The lower layer of earth's atmosphere, which exists from ground level to roughly 80 km (50 mi) above sea level
Jet stream		The region of the atmosphere between the 65 km & 330 km where gases are ionized
Mesosphere		The mass of air surrounding a planet
Stratosphere		The region of the atmosphere that extends from ground level to roughly 11 km (7mi) above sea level
Temperature		An instrument used to measure atmospheric pressure
Thermosphere		A narrow band of high-speed winds that circle the earth from west to east
Troposphere		A measure of the energy of motion in a substance's molecules