How much of the Earth’s surface is covered with water?*1 pointAbout 71%About 50%About 3%About 15%

What percentage of the Earth's surface is covered by water?*A) 50%B) 60%C) 70%D) 80%

What is the approximate percentage of Earth’s surface that is covered by the hydrosphere?

What percentage of Earth's surface is land?

Which best describes the amount of Earth’s total water supply that is usable freshwater? A. less than 1% B. less than 25% C. greater than 50% D. greater than 75%

How much of Mars's ancient ocean was lost to space?Group of answer choices15%47%65%87%100%