Earth

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  • Created by: poufie
  • Created on: 06-07-16 22:17
What makes planet earth different?
has an atmosphere of mainly oxygen & nitrogen, 70% of its surface is covered in water, life
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What are the disadvantages of the atmosphere?
restricts resolutions of starts (atmospheric turbulence), prevention of astronomical observation (due to refraction of light), absorption of most of the electromagnetic spectrum
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what is the difference between direct and indirect light pollution?
direct is light from the sources that goes straight into the sky, indirect happens because the light from the sources reflect off the ground into the sky.
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why is the sky blue?
white light (from the sun) is made up of all the colours in the spectrum. blue light has the shortest wavelength and so is scattered much more than the other colours.
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what are the advantages of the atmosphere?
1) absorbs harmful UV radiation 2) absorbs x-rays and gamma rays 3)regulates earths temperature and prevents extreme temperatures 4)contains oxygen and allows us to breathe
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name 2 tropics
tropic of cancer (+23.5 degrees) and tropic of capricorn (-23.5 degrees)
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what id the diameter of the earth (at the equator)?
13,000 km
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what is a meridian
a line that runs from the north pole to the south pole through a given place
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what chemicals stop microwaves?
water and oxygen stops mircrowaves
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what chemicals stop infra red radiation?
water, carbon dioxide and methane stops infra red radiation
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what chemicals stop x rays and gamma rays?
nitrogen and oxygen stop x-rays and gamma rays
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name 4 sources of light pollution
1)floodlights 2)streetlamps 3)motorway lights 4)security lights
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Other cards in this set

Card 2

Front

What are the disadvantages of the atmosphere?

Back

restricts resolutions of starts (atmospheric turbulence), prevention of astronomical observation (due to refraction of light), absorption of most of the electromagnetic spectrum

Card 3

Front

what is the difference between direct and indirect light pollution?

Back

Preview of the front of card 3

Card 4

Front

why is the sky blue?

Back

Preview of the front of card 4

Card 5

Front

what are the advantages of the atmosphere?

Back

Preview of the front of card 5
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