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30.1-30.2 The Earth's Moon & Its Movements

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Katelynn Dorn

on 6 May 2015

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Transcript of 30.1-30.2 The Earth's Moon & Its Movements

The Earth's Moon
satellite- body that orbits a larger body
moon, Sputnik 1, Explorer 1
1/6 the surface gravity of Earth
no atmosphere
temp range (-170 C to 134 C)
30.1-30.2 The Earth's Moon & Its Movements
The Lunar Surface
light areas- rough highlands
dark areas- maria, solidified lava
rilles- long deep channels
Craters
craters and rays (displaced materials moving out in streaks)
named after famous people- Tyco, Copernicus
maybe Earth once had craters but have been eroded
Lunar Rocks
regolith- layer of dust and rock from meteoroid crashes
lunar rocks share same density as Earth rocks but different composition
The Interior of the Moon
seismographs gather information
crust varies from 60-100 km thick
mantle is made of silica, Mg, Fe
small solid iron core
Lunar Orbit and Rotation
ellipse
apogee and perigee (avg. distance= 384,000 km)
orbits earth (27.3 days), revoles around sun, rotates on axis
Eclipses
umbra and penumbra
solar eclipses
annular eclipse during apogee
lunar eclipses- earth is between moon and sun
total lunar eclipse- moon is completely in Earth's umbra
Eclipse Activity
pg. 625
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