Earth_Moon - The Earth and Its Moon h E th h M Th e Earth...

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Unformatted text preview: The Earth and Its Moon h E th h M Th e Earth •Solid inner core, liquid outer core •atmosphere - 50km thick • agnetosphere arged The Moon •Moon has no hydrosphere, atmosphere or magnetosphere • me basic interior regions as magnetosphere - charged particles caught in Earth’s magnetic field same basic interior regions as Earth The Tides •Earth is the only planet with large quantities of liquid water on the surface •Most coastal locations experience 2 low and high tides each day •what causes this? The moon pulls the water The moon also pulls the Earth This causes two bulges - one on the side facing d th the moon and one on the opposite side where the water is “left behind” The moon is tidally locked tidally locked to the Earth - the same side of the moon is always facing us (moon rotation period is the same as its oo s w ys c g us ( oo o o pe od s e s e s s orbital period) Is there a side which is always dark? M Is there a side which we (on Earth) never see? Earth M M M Earth’s Atmosphere •nitrogen (78%) xygen (21%) •oxygen (21%) •argon (0.9%) •carbon dioxide (0.03%) •Protects the surface •Regulates temperature Ozone absorbs UV onvection light Convection occurs here Convection Warmer air travels up and cooler air comes own to take its place down to take its place •Results in convection cells which heat the atmosphere •creates surface winds and is responsible for most types of weather The Greenhouse Effect •Sunlight not reflected by clouds reaches the Earths surface (about 50%) •The heated earth re-radiates this light in the form of infrared radiation •Infrared light is partially blocked by the Earth’s carbon dioxide (and water vapor) •So, only part of the IR light goes into space, part goes back to earth The average Earth...
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This note was uploaded on 07/26/2011 for the course AST 2037 taught by Professor Eikenberry during the Fall '08 term at University of Florida.

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Earth_Moon - The Earth and Its Moon h E th h M Th e Earth...

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