•
•Expect
intermediate geologic activity based on size
–RMars = 0.53 REarth
RMoon = 0.27 REarth
–Earth
still active but lunar mare volcanism ended ~3 billion years ago
–
•Expect
intermediate atmospheric loss
–Smaller
size will make atmospheric escape easier
–Cooler
temperature (farther from sun) will make astmospheric escape harder
–
–
•In
some ways Mars is most “Earth-like” planet
–Has
polar caps
–Has
weather patterns
–Had
(in past) running water
•May
have had conditions necessary for development of life