Which of these is a change in chemical composition?
a. a lake freezes solid
b. vinegar bubbles when baking soda is added
c. a copper bar is rolled into a flat sheet
d. gravel, sand, and water are mixed
a. a lake freezes solid
b. vinegar bubbles when baking soda is added
c. a copper bar is rolled into a flat sheet
d. gravel, sand, and water are mixed