Earth and the Moon are located roughly the same distance away
QUESTION
â¢Earth and the Moon are located roughly the same distance away from the Sun, yet Earth has a permanent atmosphere while the Moon does not. Explain why.â¢Mercury and Mars have similar surface gravities, yet Mars has a permanent atmosphere while Mercury does not. Explain why.â¢Earthâs primary atmosphere consisted of hydrogen and helium, yet today it is now mostly nitrogen with some oxygen. Why did Earthâs atmospheric composition change over time?â¢What fraction of particles will have a speed less than the average speed?
ANSWER:
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