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Author Question: Mars and Mercury are similar in size, and Mercury is even denser. Why then is it Mars that has more ... (Read 102 times)

ssal

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on: Jul 27, 2018
Mars and Mercury are similar in size, and Mercury is even denser. Why then is it Mars that has more atmosphere?
 
  What will be an ideal response?

Question 2

If o is less than one, then
 
  A) only dark energy exists in the universe.
  B) there is more matter than energy in the universe.
  C) the universe will expand forever.
  D) the universe is closed, and must recycle.
  E) no matter could have existed.


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rleezy04

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Reply #1 on: Jul 27, 2018
Answer to Question 1

Its location is too close to the Sun; Mercury's gases boil away in the solar wind. Colder Mars has enough gravity to hang on to more, even though its water is no longer liquid today.

Answer to Question 2

C


ssal

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

helenmarkerine

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Reply 3 on: Yesterday
Wow, this really help

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