"Class" is a reference to the taxonomy, or classification, of all living things on Earth. All living things are divided and subdivided into Kingdoms, Phylums, Classes, Orders, Families, Genuses, and Species, the last two, Genus and Species, being the two which generally make up an animals scientific name. So, in other words "class" is part of the classification system of living things.
science class
I believe it would translate to "Where do you have science class?"
It would be "the computer (information) technology class".
The class of domestic science
Science
"Do you study science in school?", though one would be more apt to say "Do you take science classes in school?".
What is the Syllabus of Home science for class x?
Function is a science class means work, or what it does.
science
contract means when a substance becomes small due to cooling or locomotion.
it means: "when he/she finishes the science class."
They study a lot for science class.