Addition reaction - a reaction in which two or more molecules react to give a single product

Catalytic cracking - using catalyst in cracking process

Chain reaction - serial reactions in which some products of previous reactions are the reactants of the following reactions

Cracking - the breaking down of larger hydrocarbon molecules

Free radical - substances that have an unpaired electron

Haloalkane - a hydrocarbon that contains halogen but do not contain double bond or triple bond

Initiation - describe how the reaction starts

Medicinal paraffin  - highly refined mineral oil that used in cosmetics or medicines

Propagation - describe how the reaction keeps going

Renewable energy resource - energy that is generated by natural resources

Substitution reaction - a reaction in which an atom (or group of atoms) in a molecule is replaced by another atom (or group of atoms)

Termination - describe how the reaction stops