Heat energy

The water molecules get excited and begin to party.

If that is the exact question your teacher expects you to answer, your teacher is a moron. How much heat? How much water? How fast is the heat added? For how long is the water heated?

I suspect that your teacher is attempting to get you to say that the water changes state from liquid to gas. But if that is the actual language of the question, it's really, really lame.

Is there more than one change of state that can occur when heat is being added to water, Perfesser Set?

Simple answer: liquid turns to gas (eventuallyanyway).

There is. Given sufficient heat in a very short time, water can turn into plasma...

Given a sufficient quantity of water in a sufficiently "cold" ambient environment, with a sufficiently small amount of heat being added, it would be nearly impossible to record a change of state to a gas which were faster than the ordinary evaporation rate.

It depends how much heat you add. I normally add about four buckets of heat for a bath, and one and a half for a tin of beans.