Answer:
Step-by-step explanation:
The reason why salt stays in salt water when it is heated is because salt does not evaporate. When water is heated, it undergoes a process called evaporation, where the water molecules gain enough energy to escape into the air and become a gas. However, salt does not have the same properties as water molecules and does not evaporate in the same way.
During the heating process, the water molecules gain energy and turn into vapor, leaving the salt particles behind. As a result, the salt remains in the water even when it is heated. This is why, when you heat salt water, the water evaporates, leaving the salt behind.
In summary, the reason why salt stays in salt water when it is heated is because salt does not evaporate like water does.