SCIENCE!!!!

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Across
  1. 2. A substance you Can´t separate
  2. 5. EXPLODE!
  3. 6. something that has weak and strong
  4. 7. water vapor smoke
Down
  1. 1. A substance you CAN separate
  2. 2. a liquid sometimes needed in a chemical reaction
  3. 3. a ( somtimes) poisonous liquid
  4. 4. To small to see