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Home Q & A Board Science-Related Homework Help Physics Astronomy
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RUNNER84 RUNNER84
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6 years ago
Within the frost line, planetesimals were composed entirely of rock and outside the frost line planetesimals were composed entirely of ice.
 
  Indicate whether the statement is true or false

Question 2

The total number of comets orbiting the Sun is estimated to be about
 
  A) 1 trillion.
  B) 1,000.
  C) 100,000.
  D) 1 million.

Question 3

Galileo's observations of the phases of ________ could not be explained by Ptolemy's epicyclic model.
 
  Fill in the blank(s) with correct word

Question 4

Where is most of the water on Mars believed to be?
 
  What will be an ideal response?

Question 5

What unusual discovery was made about the Murchison Meteorite?
 
  A) It is from Mars.
  B) It contains iron.
  C) It contains living cells.
  D) It contains amino acids.
  E) It is the largest known meteorite.
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RedishRedish
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6 years ago
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RUNNER84 Author
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#2
6 years ago
Thank you so much for the answer
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