Solar System Inner Planets

Which planet is the closest to the Sun?

• Mercury

• Venus

• Earth

• Mars

What is the primary reason for Mercury's extreme temperature variations between day and night?

• Lack of atmosphere

• High gravitational pull

• Presence of craters

• Iron core

The largest volcano in the solar system, Olympus Mons, is located on which planet?

• Mars

• Earth

• Venus

• Mercury

The planet with the highest density among the inner planets is (a)  

Which inner planet has polar ice caps and channels that might have been carved by water?

• Mars

• Venus

• Mercury

• Earth