Question

what do these two changes have in common? water vapor condensing on a bathroom mirror ice crystals forming on a window select all that apply. both are caused by heating. both are changes of state. both are caused by cooling. both are chemical changes.

Explanation:

• Water vapor condensing is gas to liquid, ice crystals forming is gas to solid; both are state changes.
• Both processes happen when water-based gases cool down, so they are caused by cooling.
• They are physical, not chemical, changes, and not caused by heating.

Answer:

• Both are caused by cooling.
• Both are changes of state.