Heavy metal music originated from rock music and it started in the UK
I did not know that. Who started it?
In the mid 1970's Judas Priest helped spur the genre's evolution
I have never really liked any heavy metal. I prefer rock.
The roots of Heavy metal are from rock and acid rock, so you should give it a try
I do not like the yelling and "noise" of heavy metal. What is acid rock?
Acid rock is a loosely defined type of rock originated from garage punk bands, on drugs i think 
That makes sense. Do you know any examples of acid rock bands?
The Doors (Jim Morrison) and Jefferson Airplane are really famous, they have distorted and heavy sounds
I do like the Doors. Janis Joplin was my favorite artist of that time though.