Space Rocks!

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Across
  1. 4. Earth and _____ are the only inner planets that have moons.
  2. 5. A small piece of rock moving in space, usually boulder-size or smaller.
  3. 8. A rocky mass up to several hundred kilometers wide that revolves around the sun.
  4. 9. Most asteroids orbit in the region between Mars and _____ called the asteroid belt.
  5. 10. When a meteoroid enters Earth's atmosphere, it forms a _____.
  6. 11. Comets pass through the solar system in very stretched out and ______ paths.
Down
  1. 1. A dwarf planet even smaller than Earth's moon.
  2. 2. If a meteoroid hits Earth's surface, it may leave behind a _____, which is a bowl-shaped indent caused by impact.
  3. 3. A frozen mass of different types of ice and dust orbiting the sun, coming from areas beyond Neptune.
  4. 5. If a meteor does not completely burn up in the atmosphere, it may fall to Earth's surface as a _____.
  5. 6. A _____ planet is a large, round object that revolves around the sun but has not cleared the region around its orbit.
  6. 7. A natural object that orbits a body bigger than itself.