Subject: Why are scientists definitions of steam and fog in disagreement?

There is fog on the lakes around us. At school some people say it is steam 
and some of us say it should be called fog. We know that steam is what 
comes out of a kettle when you boil water. The water in the lakes is not 
boiling so it can not be steam. We checked your library and we get 
different opinions on what is steam and what is fog. Can you help us?

Re: Why are scientists definitions of steam and fog in disagreement?