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20 Cards in this Set
- Front
- Back
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Hot spot a place
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a place in the Earths mantle Where Lt is unusually hot
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Olympis
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shield Volcano on mars
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Hotspots cause
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shield Volcanoes
chain of smaller volcanoes |
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subduction
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Curved Chain of Volcanoe
composite VolcanoS high silica |
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Hot spot creates
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chain of straighti volcanoes
shield Volcanoes Basalt |
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eclipses
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partial, total, annular
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moon
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1/4 size of the earth
1/6 earths gravity less dense - indicates small core or No core- different composition Zero obliquity-. poles always in shadow NO atmosphere |
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perigee
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Earths Closest point on orbital path
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Apogee
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solar eclipse, lunar eclipse
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solar eclipse
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sun goes dark only during New moon
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Lunar eclipse .
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moon goes dark, only during full moon
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Neaptides
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Low tides 2 x a month
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springtides
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high tides
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Node
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point on eleptic point
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hypothesis of the moon
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giant impact
Co-acceration capture fission - only giant impact is NOW considered |
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evidence Of the moon
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Degree of crater degradation
superposition # of craters per unit area Bright crater Rays Radiometric dating samples of Apollo samples |
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4.6 Billion years ago
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accretion of the moon and formation of magma ocean , Lighter mineralS float to the top to form highlands crust
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4.6-3.9 billion years ago
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period Of heavy bombardment excavates Large basins and old craters highlands takes on present appearance
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3.9-3.0 Billion years ago
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Flood Basalts Fill in the large impact Basins creating the Maria
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3.0 - present
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light cratering and the formation at Bright Rayed craters
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