Is it February break, yet?

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Across
  1. 2. something that can be observed about a substance, such as texture, resistance to breakage, or color
  2. 7. a process in which atoms rearrange to form new substances
  3. 8. an ending substance that is created during a chemical reaction
  4. 9. letters and numbers showing the number and type of atoms that repeat to make up a substance
  5. 11. we know if substances are different if they have different _______
Down
  1. 1. very very very small lizards (too small to be seen with the naked eye) would probably be covered in these (2 words, no space, and it's plural, e.g. whitecrystals)
  2. 3. a starting substance that is part of a chemical reaction
  3. 4. we know a chemical reaction has occurred if a new________ is created
  4. 5. something that is made of all the same atoms or groups of atoms
  5. 6. we can't see molecules, but we can visualize them by using a _____
  6. 10. the parts of a substance that rearrange to make a new substance in a chemical reaction