Quiz time!!!

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Across
  1. 2. reaction when two chemicals crash into each other and make something new
  2. 6. of reaction how long it takes a chemical reaction to take place
  3. 7. ____ the space
Down
  1. 1. lines up the chemicals
  2. 3. what makes chemicals move faster
  3. 4. _____ up clumps
  4. 5. if you add more of these, they have more chances to run into each other