Inner Planets/Terrestrial planets

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Across
  1. 6. The only know planet that supports life.
  2. 7. The first 4 planets to the Sun that are warm and rocky.
  3. 8. The most well known planet in our solar system except Earth.
  4. 9. This planet is Earth "sister" planet.
Down
  1. 1. A gas that surrounds a planet or object.
  2. 2. The planet that has the shortest revolution around the Sun.
  3. 3. The last 4 planets to the Sun that are cold and have a liquid/gas center
  4. 4. Like or similar to Earth.
  5. 5. An object that revolves a planet or object.
  6. 10. The only star in our solar system.