How are earth and the moon alike?

How is the moon and earth alike?

• Answer:

  They aren't. The earth has a molten core, the moon has a solid core. The earth has an atmosphere, the moon doesn't. The earth is comprised mainly of water, the moon is comprised only of rock (with speculation that there might be small frozen deposits of lunar water sitting in craters). I suppose the only similarities would be shape (sort of), the fact that they orbit around something larger than themselves, they both produce gravity and the fact that they are both a part of the same solar system.