geophys 1

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  • Created by: jake
  • Created on: 25-04-13 09:39
how old is the earth?
4.5-4.6 billion years
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how old are the oldest rocks found on the earth?
3.4-3.8 billion years
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What is the nebula hypothesis?
that the solar system was formed by a rotating nebula causing mass to collide, forming dense and solid planets near the center and gaseous planets farther out
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what is Bodes law?
each planet is twice as far away from the sun than its closest neighbor
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When was the moon formed?
between 4.56 and 4.44 billion years ago
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how did the moon form
A mars-sized body collided with the earth
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what were the effects of the moon formation even?
~65% of earth melt, knocked the axis off to 23 degrees inclination and caused it to spin faster. the denser material from the impact stayed on the earth and the lighter material was thrown up into orbit where itslowly condensed and became the moon
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Define' differentiation'
The transformation of a random mix of chunks of matter to a body in which the interior is divided into concentric layers that differ from one another both physically and chemically
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how did the oceans and atmosphere form?
volcanic activity allowed for the excape of volatiles from the earths center. Hydrogen, nitrogen and C02 went to form the atmosphere whilst water formed the oceans
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Other cards in this set

Card 2

Front

how old are the oldest rocks found on the earth?

Back

3.4-3.8 billion years

Card 3

Front

What is the nebula hypothesis?

Back

Preview of the front of card 3

Card 4

Front

what is Bodes law?

Back

Preview of the front of card 4

Card 5

Front

When was the moon formed?

Back

Preview of the front of card 5
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