atmosphere of earth

The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity. The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation). By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere. Air content and atmospheric pressure vary at different layers, and air suitable for use in photosynthesis by terrestrial plants and breathing of terrestrial animals is found only in Earth's troposphere and in artificial atmospheres. The atmosphere has a mass of about 5.15×1018 kg, three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner and thinner with increasing altitude, with no definite boundary between the atmosphere and outer space. The Kármán line, at 100 km (62 mi), or 1.57% of Earth's radius, is often used as the border between the atmosphere and outer space. Atmospheric effects become noticeable during atmospheric reentry of spacecraft at an altitude of around 120 km (75 mi). Several layers can be distinguished in the atmosphere, based on characteristics such as temperature and composition.
tree and meadow - tree and meadow with wide sky
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tree and meadow

Added 4 days ago by internet

27 1

green hills - green hills, river, reflection of the sun
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green hills

Added 3 weeks ago by sandra

144

Koala on the tree - Koala eats eucalyptus leaves
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Koala on the tree

Added 4 weeks ago by mig

19

Sunset. - Sunset. Cloudy sky.
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Sunset.

Added month ago by Zeta

41

BAJKOWY VIEW - Leave, rest, relax
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BAJKOWY VIEW

Added month ago by ada

143

tetmajerWlesie - Match the image to a verse of the poem
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tetmajerWlesie

Added month ago by bszam

41

Skydiving. - Skydiving.
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Skydiving.

Added month ago by Zeta

27

Sunset. - Sunset by the sea.
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Sunset.

Added month ago by Zeta

42

dandelion - dandelion on the background of the sky, spring
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dandelion

Added 2 months ago by sandra

71

Jellyfish!!! - jellyfish !!!!!!!!!!!!!!!!!!!!
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Jellyfish!!!

Added 2 months ago by Marcin

50

Landscape - colorful jigsaw puzzle
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Landscape

Added 2 months ago by andi

171

The approaching storm. - The approaching summer storm.
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The approaching storm.

Added 2 months ago by Zeta

28

spring landscape - dandelion on a blue background
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spring landscape

Added 2 months ago by sandra

181

antimatter - man and antimatter, antimatter and man
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antimatter

Added 2 months ago by człowiek

12

spring landscape - spring fields. agricultural landscape
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spring landscape

Added 2 months ago by sandra

94

Autumn in Massachusetts. - Autumn in Massachusetts.
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Autumn in Massachusetts.

Added 2 months ago by Zeta

67

mountain landscape - storm clouds over the mountains,
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mountain landscape

Added 2 months ago by sandra

88

Aircraft - colorful jigsaw puzzle
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Aircraft

Added 2 months ago by andi

19

Lonely tree in the field. - Lonely tree in the field.
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Lonely tree in the field.

Added 2 months ago by Zeta

23

Landscape - colorful jigsaw puzzle
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Landscape

Added 3 months ago by andi

122

Views - The view from my balcony at home
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Views

Added 3 months ago by Cler

11

Croatia - lorem ipsum dolor sit amet
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Croatia

Added 3 months ago by Ayla

25

masuria - Masuria from a bird's eye view
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masuria

Added 3 months ago by Ela

37

Matterhorn - Lorem ipsum dolor sit amet
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Matterhorn

Added 3 months ago by Ayla

19

route - game for route leaders
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route

Added 3 months ago by Giu

262 1

Dandelion - a plant originating from dandelions
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Dandelion

Added 3 months ago by Zakreconax3

74

SKY IDENTITY - PUZZLE SKY IDENTITY
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SKY IDENTITY

Added 4 months ago by KIRA

131

SKY PUZZLE - SKY BLUE 4 PIECES IDENTITY
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SKY PUZZLE

Added 4 months ago by KIRA

55

Landscape - colorful jigsaw puzzle
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Landscape

Added 4 months ago by andi

106

Matterhorn - lorem ipsum dolor sit amet
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Matterhorn

Added 4 months ago by Ayla

38

winter, winter - it's cold in winter
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winter, winter

Added 4 months ago by Basiunia

239

winter sun - sunny winter weather
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winter sun

Added 4 months ago by Basiunia

226 1

Volcano eruption - lorem ipsum dolor sit amet
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Volcano eruption

Added 4 months ago by Ayla

46

View from space - colorful jigsaw puzzle
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View from space

Added 4 months ago by andi

67

Glass floor - View from the glass floor of the observation tower on the streets of Toronto
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Glass floor

Added 4 months ago by Xam

35

valeria explorers - game scout scouts
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valeria explorers

Added 4 months ago by vale

84

valeria - scout game
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valeria

Added 4 months ago by vale

43