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The Atmosphere (composition of the Atmosphere (oxygen (2nd most abundant…
The Atmosphere
composition of the Atmosphere
nitrogen
most abundant gas in atomosphere
3/4 of air we breathe
carbon dioxide
each molecule has 1 carbon and 2 oxygen atoms
essential to life
oxygen
2nd most abundant in atmosphere
1/4 of the volume
most oxygen= 2 oxygen atoms
ozone= form of oxygen that has 3 oxygen atoms instead of 2
other gasses
trace gasses, small amounts of them are present
water vapor
water= form of gas
2 atoms of hydrogen and 1 of oxygen
particles
solid and liquid particles of dust, smoke, salt and other chemicals
Importance of the Atmosphere
makes conditions on earth suitable for life
constantly changing- gases moving in and out of living things, land, and water
keeps surface of earth warm enough for water to exist as liquid
protects from radiation from sun
prevents being hit by most meteoroids or rocks from space