Chemistry

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Across
  1. 1. The rate of a chemical reaction increases at ______ temperatures
  2. 3. Materials made from chemical reactions
  3. 5. The law of _____ proportions says that the compounds in an equation have a fixed ratio
  4. 8. Chemical reactions happen in a ____ system
  5. 9. How long it takes for reactions to happen
  6. 10. The theory of how effective collisions happen
Down
  1. 2. The original materials in a reaction
  2. 4. How dense the reactants are. An increase in this increases reactions
  3. 6. For a reaction to happen the energy must be...
  4. 7. When there is the same number of atoms on both sides of an equation