Why Do Scientists Believe There Was Once Liquid Water on Mars

question 12

Multiple Choice

Why do scientists believe there was once liquid water on Mars?

• A) Depositional landforms are seen on Mars,but not erosional landforms.
• B) Landforms such as river channels and sandbars are seen on Mars.
• C) Large depressions are seen on Mars that were once large lakes.
• D) Evidence of marine life has been found in the rocks on Mars.

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