In daily life, we often use the word "heat", but their meanings are often different. For example, "it's very hot today", the word "hot" here.

(1) Weather heat means high temperature, and "heat" here means "temperature";

(2) Friction generates heat, which means that when an object does work on friction, the temperature rises and the internal energy increases. Here, "heat" means "internal energy".

(3) The heat absorption of an object means that the object absorbs heat from the outside. Here, "hot" means "hot";

So the answer is: temperature; Internal energy; Heat.