science crossword

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Across
  1. 2. fill the sky
  2. 4. is very hot
  3. 5. earth is one of them
  4. 6. are runny
  5. 8. living things in our environment
  6. 9. classified a dwarf planet
Down
  1. 1. also the name of a chocolate
  2. 3. do lots of experiments
  3. 4. are hard
  4. 7. the planet we live on