Question

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Explanation:

This appears to be a fill - in - the - blank question related to the concept of conservation of mass in a physical or chemical context. When crushing bath bombs, we are dealing with a system (the bath bomb material) and the key idea is that the mass of the closed system (if we consider the bath bomb and its components without matter entering or leaving) and the mass of the system (the total amount of matter in the bath bomb, which should remain the same as we are just changing its physical form, not creating or destroying matter) stay the same.

The question is about the conservation of mass when crushing bath bombs. A closed system (where no matter enters or leaves) has its mass conserved. When we crush the bath bomb (a physical change), the total mass of the system (the bath bomb's material) remains constant. So the first blank should be "closed" (referring to the type of system where mass is conserved) and the second blank should be "mass" (the quantity that stays the same in a closed system during physical changes like crushing).

Answer:

When we crushed the bath bombs, the mass of the \underline{closed} and \underline{mass} systems stayed the same.