General Procedures:
1.Make sure all unnecessary objects such as backpacks,purses, etc.are put away from the work table.
2.Carry the microscope by the base and arm with both arms.
3.Be sure that your slide and oculars are clean.Use lens paper only.
4.Make sure that the scanning objective clicks into place.

explain every sentence,why do i need to do it and what's the cause or wha could possibly happened if i didn't do it.​