which would show an example of how physical changes are reversible?\ncutting a gold bar in two pieces and…

which would show an example of how physical changes are reversible?\ncutting a gold bar in two pieces and then putting the pieces next to each other\nburning a match and then relighting it\nmelting tin and then cooling it into a mold\ncombining sodium and chlorine to make the new material of table salt

which would show an example of how physical changes are reversible?\ncutting a gold bar in two pieces and then putting the pieces next to each other\nburning a match and then relighting it\nmelting tin and then cooling it into a mold\ncombining sodium and chlorine to make the new material of table salt

Answer

Brief Explanations:

Physical changes alter a substance's form without changing its chemical composition. Melting tin (changing it from solid to liquid) and then cooling it back to a solid in a mold is a physical change that can be reversed. Cutting a gold - bar and putting pieces together doesn't fully reverse the change as there are new surfaces created. Burning a match is a chemical change. Combining sodium and chlorine is a chemical reaction.

Answer:

melting tin and then cooling it into a mold