X Earth's atmosphere is made of a mixture of gasses and keeps the surface0/2 warm. However, Mars has a
atmosphere which makes the
surface very cold. *
thinner
thicker
similar

Mars atmosphere is thinner? Because compared to Earth it's atmosphere is thinner, as can be seen that it lack life despite being in the goldilocks zone. And it doesn't have a thicker one because that should also result it some form if living organism being created.

5.4%

explanation:

the acceptance rate for harvard is 5.4%. this means only 5 percent of people who apply actually get accepted!

answerhydrogenous sediment;