Question

1. crushing large stones into smaller stones is an example of a *

a. physical change
b. chemical change
c. both a and b
d. a change in mass

Explanation:

A physical change is a change in which no new substances are formed. Crushing large stones into smaller stones only changes the size and shape of the stones, not their chemical composition. A chemical change would involve a reaction that forms new substances. According to the law of conservation of mass, the mass of the stones remains the same (just divided into smaller pieces), so it's not a change in mass.

Answer:

A. physical change