Catalyst:This is something that speeds up the reaction rate without being consumed in the process - like turning up the speed on your movie player!
Activation Energy:This is the minimum amount of energy needed for reactants to start reacting - like needing enough interest or excitement to actually start watching your movie.
Equilibrium: This is when forward and reverse reactions occur at equal rates, so there's no net change in concentrations of reactants or products - like pausing your movie where nothing changes until you hit play again!