The sand will dissolve in the water because sand in water is a solution. The sand will dissolve in the water because sand in water is a mixture. The sand will settle to the bottom because sand in water is a solution. The sand will settle to the bottom because sand in water is a mixture.
I gave my students this multiple choice question: What will happen after stirring sand in a glass of water?

Only one answer is correct among these 4 choices:
- The sand will dissolve in the water because sand in water is a solution.
- The sand will dissolve in the water because sand in water is a mixture.
- The sand will settle to the bottom because sand in water is a solution.
- The sand will settle to the bottom because sand in water is a mixture.

Could you tell me which one is correct?

The sand will settle to the bottom because sand in water is a mixture.