reaction rate crossword

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Across
  1. 2. an equation that relates reaction rate and concentration of reactants
  2. 4. increasing this will raise the average kinetic energy
  3. 5. states that for a chemical reaction to occur, the reacting particles must collide with one another.
  4. 7. substance that speeds up a chemical reaction without being consumed
Down
  1. 1. a sequence of elementary steps by which a chemical reaction occurs.
  2. 3. a type of catalyst in a different phase as the reactant
  3. 6. for a chemical reaction to occur it must have sufficient energy and _____