The atmosphere Flashcards
what is the atmosphere
a thin layer surrounding the earth, that remains in place due to the pull of gravity
how many main gases is the atmosphere made of
3 main gases
what are the 3 main gases in order from most least proportion
nitrogen (78%)
oxygen (21%)
Argon (0.93%)
what is uv light
type of radiation from sunlight
what percentage of the light from the sun is uv
10%
What is IR light
radiation form the sun
accounts for some heating form the sun
how many watts is IR
529
how many watts is visible light
445
how many watts is UV
32
what % of heat does IR account for
49% rest from visible light
why does most UV that passes through the upper atmosphere not reach earth?
due to the three forms of oxygen in the atmosphere
together they form ozone that absorbs UV light
what are the three types of oxygen in the stratosphere
O
O2
O3
what happens between UV and Ozone
chemical reaction of the threes types of O and uv break down the ozone
maintaining it at a perfect thickness
what is another name for the balanced thickness of the ozone
dynamic equilibrium
does visible light reach earth
yes