Potential Energy: This is stored energy or energy due to position. It's like a boulder perched on top of a hill - it has potential to do work if it rolls down.
Catalyst: A substance that speeds up a chemical reaction by lowering the activation energy needed. It's like an extra friend helping you push that stalled car - with their help, less effort is needed from you.
Exothermic Reaction: A chemical reaction that releases heat (energy). Imagine lighting a firework - once ignited, it releases light and sound (energy).