Match the words with the proper definitions. Question 5 options:

Increasing this increases the average kinetic energy of the reactant molecules (more collisions means more molecules with energies greater than the activation energy).

Increasing this increases the exposure to other substances, thus increasing the frequency of collisions.

Increasing this will increase the frequency of collisions because you are adding more reactants.

This increases the rate of a system's reactions without being used up itself.

1.
Concentration

2.
Temperature

3.
Surface area

4.
Catalyst