<span>Water on Mars exists today almost entirely as ice, though it also exists in small quantities as vapor in the atmosphere and occasionally as low-volume liquid brines in shallow Martian soil. The only place where water ice is visible at the surface is at the north polar ice cap.</span>
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Geolgic time is measured by observing the changes in the fossils from oldest to youngest sedimentary rocks.
Explanation:
Answer:
just let me know when you get here
71% of Earths surface is covered by water.
