Question

which statements describe the planets? check all that apply.
mars and venus are mostly rock.
the ancient greeks discovered all the planets in the solar system.
saturn is classified as a gas giant.
jupiter is mostly rock surrounded by clouds.
pluto is considered a dwarf planet.
earth is much smaller than uranus.

Explanation:

• Mars and Venus are terrestrial (rocky) planets, so this is true.
• The ancient Greeks only knew 5 visible planets; outer planets were discovered much later, so this is false.
• Saturn is one of the four gas giants in our solar system, so this is true.
• Jupiter is a gas giant, not a rocky planet, so this is false.
• Pluto was reclassified as a dwarf planet in 2006, so this is true.
• Uranus is a gas giant with a much larger diameter and mass than Earth, so this is true.

Answer:

• Mars and Venus are mostly rock.
• Saturn is classified as a gas giant.
• Pluto is considered a dwarf planet.
• Earth is much smaller than Uranus.