Write down the names of the following physical changes: ① The water in the fish tank has become less _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Write down the names of the following physical changes: ① The water in the fish tank has become less _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Answer: ① The water in the fish tank becomes less, and the water becomes steam, which is vaporization;

(2) Eating popsicles to reduce fever in summer is the melting phenomenon of using popsicles and absorbing heat;

(3) the hot air hand dryer evaporates the water on the hand into steam, which is a vaporization phenomenon;

④ It is a solidification phenomenon that molten steel changes from liquid to solid ingot.

Therefore, the answers are: ① vaporization; ② melting; ③ vaporization; 4 curing.