Science Crossword

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Across
  1. 2. increasing the concentration ___________ the number of collisions per second
  2. 3. the amount of energy required to pull two bonded atoms apart
  3. 6. there are _____types of chemical reactions.
  4. 7. during a chemical reaction, one or more new compounds are formed as a result of the rearrangement of what?
  5. 9. bond energy is also known as what?
  6. 10. reactants turn into what?
Down
  1. 1. no atoms are gained or lost duing any reaction; this describes what?
  2. 4. how quickly the concentration of reactants decreases and how quickly the concenration of products increases
  3. 5. a substance that lowers the activation energy of a chemical reaction
  4. 8. clues to indicate chemical change include heat given off, bubbles or gas, precipitate may form, the change is difficult to reverse, and what else?