Question

Grinding quartz crystals down to produce sand is an example of a

a. change of state.
c. chemical reaction.
b. chemical change.
d. physical change. Please select the best answer from the choices provided A B C D

Answer 1

The answer is D because the chemical makeup has not changed. It is still the same quartz just looks different.

Hope that helps! God bless!

Answer 2

Grinding quartz crystals down to produce sand is an example of a physical change. Correct answer: D Physical change is a change of the form of a chemical substance, but not its chemical composition. And this is exactly what grinding quartz crystals is. A physical change differs from a chemical change in that new substances are formed.