How did Mars get its two moons?
a. Mars captured asteroids from the asteroid belt.
b. Mars suffered a catastrophic meteor impact, breaking a piece off the planet.
c. Mars had planetary bodies near it when the solar wind blew out the nebula.
d. Mars collided and fused with another planet leaving two remnants behind.
e. Mars captured comets from the Kuiper belt.
Question 2
What keeps water frozen on Mars?
a. The constant subzero surface temperatures
b. The low atmospheric pressure of the planet
c. The distance between Mars and the Sun
d. The relatively quick rotation period
e. The negligible axis tilt of the planet
