Which planet, if any, is tilted on its axis? Select all that apply. A. Earth B. Venus C. Mercury D. Mars

All of the planets in our solar system are tilted on their axis to some degree. However, the degree of tilt varies from planet to planet.

A. Earth - Yes, Earth is tilted on its axis. The tilt of Earth's axis is about 23.5 degrees. This tilt is the reason we have different seasons.

B. Venus - Yes, Venus is also tilted on its axis. However, its tilt is very extreme, almost 177 degrees. This is so extreme that it's almost as if Venus is upside down.

C. Mercury - Mercury has the smallest axial tilt of all the planets in our solar system, with a tilt of nearly zero degrees. So, while technically it does have a tilt, it's so small that it's almost negligible.

D. Mars - Yes, Mars is tilted on its axis. The tilt of Mars' axis is about 25 degrees, which is very similar to Earth's tilt. This is why Mars also has seasons, although they are much longer than Earth's due to its longer year.