The choices describe four hypothetical planets. Which one would you expect to have the most features of erosion? (Assume the planets orbit a star just like the Sun and that they are all the same age as the planets in our solar system.)

A) Size: same as Venus
Distance from Sun: same as Mars
Rotation rate: once every 25 hours
B) Size: same as the Moon
Distance from Sun: same as Mars
Rotation rate: once every 10 days
C) Size: same as Mars
Distance from Sun: same as Earth
Rotation rate: once every 18 hours
D) Size: twice as big as Earth
Distance from Sun: same as Mercury
Rotation rate: once every 6 months


A) Size: same as Venus
Distance from Sun: same as Mars
Rotation rate: once every 25 hours

Physics & Space Science

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