a. Remote Labs are physical laboratories that can be operated at a distance and they offer the students the ability to conduct real experiments and collect real data from a physical laboratory in a remote location.
b. Virtual labs are software that mimic physical equipment. Depending on the level of sophistication they can range from simple illustrations of physical processes that allow students to manipulate very few variables all the way up to accurate simulations of the experimental process complete with measurement errors.
c. Data sets are databases which contain scientific data gathered in real experiments. These can be used directly in place of real experiments and measurements when access to such experiments is limited.
The prerequisite for adding any online lab in the Go-Lab repository is that the students need to be able to manipulate at least one variable.