student measures 100 g of sand and 100 g of water separately. The student then pours the sand into the water a

Question

student measures 100 g of sand and 100 g of water separately. The student then pours the sand into the water and stirs the mixture. The total mass is measured.

 

Which statement describes the total mass after the sand and water are mixed?

 

	A.	
The total mass is slightly less than the combined original masses.

	B.	
The total mass is slightly greater than the combined original masses.

	C.	
The total mass is equal to the combined original masses.

	D.	
The total mass is double the combined original masses.

GPT-5 mini · Answer

C. The total mass is equal to the combined original masses.

Explanation: In a closed system mass is conserved. Mixing 100 g of sand with 100 g of water yields 200 g total (unless some material is lost or gained from the surroundings, e.g. spillage or evaporation).

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