The ocean sequence

1. Filtration (or Decantation): Removes impurities (left with a solid residue on the filter paper and a clear liquid called the filtrate.)

2. Evaporation with steam bath: drive away water and obtain sodium chloride from the filtrate and create a hot, concentrated solution. 

3. Crystallization: cool the hot concentrated solution

Evaporation only (no crystallisation):impure and in powder form

Evaporation and crystallisation: purer and is in crystal form.