What did the Mars rover Opportunity discover on Mars that relates to questions about the existence of water on Mars?
A) The rover found sedimentary rocks that contained minerals that could only have formed by precipitation from water.
B) The rover found liquid water emerging from a spring, freezing to ice.
C) The rover found ice in the soil.
D) The rover found no evidence of water ever having been on Mars.

Question

Quizplus · Accepted Answer

The Mars rover Opportunity discovered sedimentary rocks that contained minerals, such as hematite and gypsum, that could only have formed by precipitation from water. This discovery provided strong evidence for the past existence of liquid water on Mars.

What Did the Mars Rover Opportunity Discover on Mars That