The Moon's Low Average Density Tells Us That the Interior

Q12: A giant meteor impact crater is found

Q13: The four outer (giant) planets are composed

Q14: The moon has active volcanoes and plate

Q15: Biological processes have removed most of the

Q16: This star provides the energy that drives

Q18: Asteroids are generally rocky, solid bodies orbiting

Q19: The Moon's _ explains why it is

Q20: A planet's mass and radius have no

Q21: Io is the most volcanically active body

Q22: Large, smooth, dark areas visible on the