sciencee crossword puzzle

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Across
  1. 3. time in space
  2. 5. the galaxy we live in
  3. 8. a giant burning ball of gas in space
  4. 11. a lung desiese
  5. 16. the brain of a cell
  6. 17. what keeps our planet safe
  7. 19. smallest planet
  8. 20. a tool to measure wind speed
Down
  1. 1. a jar that is used for expiriments
  2. 2. what everything is made of
  3. 4. what we live in
  4. 6. when all rain water goes into a river
  5. 7. cycle a cycle of rain
  6. 9. what you gather to make an experiment
  7. 10. an experiment method
  8. 12. closest planet to the sun
  9. 13. what we all are made up from
  10. 14. when water sticks to water
  11. 15. earths sister planet
  12. 18. our planet