You are presented with the quiz "condensing means the opposite change of state to what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "condensing means changing from a gas into a liquid by reducing heat energy" and "boiling is the change of state from liquid to gas, with condensation the reverse change". 

So, what's the best answer to the question?


 

      boiling     