The atmosphere Flashcards

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1
Q

what is the atmosphere

A

a thin layer surrounding the earth, that remains in place due to the pull of gravity

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2
Q

how many main gases is the atmosphere made of

A

3 main gases

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3
Q

what are the 3 main gases in order from most least proportion

A

nitrogen (78%)
oxygen (21%)
Argon (0.93%)

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4
Q

what is uv light

A

type of radiation from sunlight

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5
Q

what percentage of the light from the sun is uv

A

10%

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6
Q

What is IR light

A

radiation form the sun
accounts for some heating form the sun

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7
Q

how many watts is IR

A

529

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8
Q

how many watts is visible light

A

445

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9
Q

how many watts is UV

A

32

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10
Q

what % of heat does IR account for

A

49% rest from visible light

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11
Q

why does most UV that passes through the upper atmosphere not reach earth?

A

due to the three forms of oxygen in the atmosphere
together they form ozone that absorbs UV light

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12
Q

what are the three types of oxygen in the stratosphere

A

O
O2
O3

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13
Q

what happens between UV and Ozone

A

chemical reaction of the threes types of O and uv break down the ozone
maintaining it at a perfect thickness

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14
Q

what is another name for the balanced thickness of the ozone

A

dynamic equilibrium

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15
Q

does visible light reach earth

A

yes

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16
Q

what happens to visible light when it reaches earth

A

absorbed and then converted to heat then re-immitted as infrared

17
Q

where is most of the suns energy concentrated

A

the equator- between the tropics

18
Q

how does terrestrial radiation redistributed

A

re-emitted infrared into the atmosphere and then is redistributed via wind cells around the world

19
Q

how is the temperature controlled in the troposphere

A

ELR- environmental lapse rate

20
Q

what is the ELR

A

for every 100m you rise in the atmosphere the temperature will drop by 0.65*C

21
Q

what % of gases are between the earth and the troposphere

A

80%

22
Q

what type of solar energy arrives at earth

A

mostly short wave (UV, visible light and near infrared)

23
Q

what type of energy usually leaves earth

A

long wave infrared