Question

according to the law of conservation, when matter changes state its ______ remains the same
a. volume
b. mass
c. energy
d. temperature

Explanation:

The law of conservation of mass states that in a closed system, mass is neither created nor destroyed, even when matter changes physical state (like solid to liquid to gas). Volume, energy, and temperature can change during a state change, but mass remains constant.

Answer:

B. mass