Across
- 2. This planet has two moons.
- 4. It has a red surface.
- 6. Is Mercury the smallest or the largest planet?
- 7. This planet is about the same size as Earth.
Down
- 1. The inner planets all have rocky ---.
- 3. This planet has yellow-white clouds of acid.
- 4. This planet is closest to the sun.
- 5. The only planet that has life.