How can heat change matter?

Answer:
A good example is the boiling kettle. When the water is boiling the water molucles jump about and some escape up the kettles spout. Most people will notice the water vapour first which mistakingly they call steam. The real steam is a few centimeters from the end of the spout and is invisible.
First answer by R Harrison. Last edit by R Harrison. Contributor trust: 395 [recommend contributor recommended]. Question popularity: 0 [recommend question].