1. Rank these planets in order from longest to shortest year: (a) Mercury, (b) Venus, and (c) Earth. 2. Rank these planets in order of increasing number of moons: (a) Mars, (b) Venus, and (c) Earth....

1. Rank these planets in order from longest to shortest year: (a) Mercury, (b) Venus, and (c) Earth.

2. Rank these planets in order of increasing number of moons: (a) Mars, (b) Venus, and (c) Earth.

3. Rank in order of increasing average density: (a) Jupiter, (b) Saturn, and (c) Earth.