Inner planets vocabulary check

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Across
  1. 2. The only planet with life on it (that we know of)
  2. 3. It gives us the heat and light we need!
  3. 6. The inner planets are all made of this
Down
  1. 1. The closest planet to the sun
  2. 4. The red planet
  3. 5. The hottest planet in our solar system!
  4. 7. The fancy word we use for planets going around a star