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Home Q & A Board Science-Related Homework Help Physics Astronomy
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RedManchester23 RedManchester23
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6 years ago
Explain why it is a common misconception to believe that life on Earth exists because of the presence of oxygen.
 
  What will be an ideal response?

Question 2

Briefly explain why there is a main sequence on the H-R Diagram.
 
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Question 3

Why can we not see as many craters on Earth as on the Moon?
 
  What will be an ideal response?

Question 4

Cepheid variables can be used to determine distances because their _____________ can be determined from their _____________.
 
  Fill in the blank(s) with correct word
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magn0117magn0117
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6 years ago
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This verified answer contains over 410 words.
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RedManchester23 Author
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6 years ago
Good timing, thanks!
jcarter
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Yesterday
Correct Slight Smile TY
DragonHeart
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2 hours ago
This site is awesome
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