Question

Which would show an example of how physical changes are reversible?

A. cutting a gold bar in two pieces and then putting the pieces next to each other
B. burning a match and then relighting it
C. melting tin and then cooling it into a mold
D. combining sodium and chlorine to make the new material of table salt

Answer 1

C) the tin one

Step-by-step explanation:

because its the same substance, it was just heated and formed into a new shape.

Answer 2

C because it’s reshaping it, it stays the same but just reshaping it