Did it ever rain on Mars?

History of Life – Did it ever rain on Mars
One of the big questions in astrobiology is whether Earth is the only possible place in our solar system for life. We know life needs liquid water, so it makes sense to study where else liquid water could exist besides Earth.
There are 7 questions in this assignment. You’ll get 30 points for just attempting the homework and 10 points extra for each question you get right. You can add your answers online. You must number your answers so the grader knows which answer goes to which question.