1. The Microscope

2.  Fill in the Microscope Parts. Ocular Lens (eyepiece) Body Tube Arm
Nosepiece
Objective Lenses: 4X, 10X, 40X
Stage Clips
Stage
Diaphragm
Course Adjustment Knob
Light Source
Fine Adjustment Knob
Base

3. 
Magnification 40
100
400

4. Focusing the Microscope
Start with the lowest power objective lens first.
Move the stage up using the coarse adjustment, so the specimen is as close to the lenses as possible without touching it. 
Look through the eyepiece lens and focus until the image is sharp using the fine adjustment. 
Switch to the next power lens and do minor adjustments with the fine focus knob.
Repeat if necessary

5. 
Microscope Parts
Eyepiece Lens:  The lens at the top that you look through.  They are usually 10X or 15X power. 
Tube:  Connects the eyepiece to the objective lenses
Arm:  Supports the tube and connects it to the base. Hold the arm to carry.
Base:  The bottom of the microscope, used for support. Hold the bottom of the base to carry.

6. 
Microscope Parts
Illuminator/light:  A steady light source (110 volts) used in place of a mirror.
Mirror:  to reflect light from an external light source up through the bottom of the stage.
Stage:  The flat platform where you place your slides. (If it has a mechanical stage, use the two knobs to move the slide around)
Stage Clips:  hold the slides in place.

7. 
Microscope Parts
Objective Lenses:  Increases magnification. Usually you will find 3 or 4 objective lenses on a microscope. 
4X, 10X, 40X
Total magnificiation= eyepiece X objective
Diaphragm or Iris:  the rotating disk under the stage. 
Coarse Adjustment Knob: moves stand to focus image (major adjustments)
Fine Adjustment Knob: moves stand small amount to focus image (minor adjustments)