describe a microscope practical
- add a drop of water to the middle of a clean slide
- cut up onion and separate out into layers. use tweezers to peel of some epidermal tissue from the bottom of one of the layers.
-using the tweezers, place the epidermal tissue into the water in the slide
-add a drop of iodine solution
-place a cover slip on top
- clip the slide you've prepared onto the stage
- select the lowest objective lens
- use the coarse adjustment knob to move the stage up just below the objective lens
- look down the eyepiece. use the coarse adjustment knob to move the stage downwards until the image is roughly in focus
-adjust the focus with the fine adjustment knob, until you get a clear image of what's on the slide
- if you need to see the slide with greater magnification,swap to a higher-powered objective lens and refocus.