Fireworks Crossword

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Across
  1. 2. safe place to launch
  2. 3. subject about chemical reactions
  3. 8. we all must protect it
  4. 9. firework engineers
Down
  1. 1. colorful blast
  2. 4. angles in the air
  3. 5. powder used to make fireworks
  4. 6. most important thing
  5. 7. subject about things in motion