晶體......

1)put some salt in a beaker
2)add some water to dissolve it
3)use a heater to heat it
4)the salt water will become crystal

把稀釋的溶液加熱，令它的濃度增加，使它變成飽和溶液，再慢慢冷卻，過幾天就有晶體開始形成。