Question

what do these two changes have in common? melting glass water boiling on a stove select all that apply. both are only physical changes. both are chemical changes. both are caused by heating. both are caused by cooling.

Explanation:

Melting glass and water boiling are physical changes as the substances' chemical identities remain the same. They are caused by heating - melting glass requires heat to change from solid to liquid, and boiling water needs heat to change from liquid to gas.

Answer:

A. Both are only physical changes.
C. Both are caused by heating.