The moons of Mars are believed to be
A)composed primarily of iron and nickel.
B)composed primarily of frozen gases of water and carbon dioxide.
C)orbiting Mars in a direction opposite to the direction that Mars rotates.
D)formed from material ejected from Olympus Mons and other large volcanoes on Mars.
E)captured asteroids.

Question

Quizplus · Accepted Answer

The moons of Mars, Phobos and Deimos, are believed to be captured asteroids. They have unusual properties that suggest they were formed elsewhere in space and then captured by Mars' gravity. They are irregularly shaped and have a composition similar to carbonaceous asteroids.

The Moons of Mars Are Believed to Be