| A | B |
|---|
| microscope | an instrument that magnifies very tiny things in order to make them appear larger. |
| micro | very small |
| scope | to look at |
| lenses | curved pieces of glass |
| Anton van Leeuwenhoek | invented the first simple microscope |
| Hans and Zacharias Janssen | invented the first compound microscope |
| compound microscope | a microscope that uses more than one lense |
| convex lenses | lenses that curve outward like the surface of a sphere |
| concave lenses | lenses that curve inward like the inside of a hollow ball |
| low - power objective | a 10x magnification lense |
| high - power objective | lense with the greatest amount of magnification |
| electron microscopes | does not use light; use electrons to magnify objects |
| transmission electron microscope TEM | used to study parts in a living cell |
| scanning electron microscope SEM | used to view dead cells and tissue |
| light stereoscope microscope | used to use see three- dimensional views of objects too thick to let light pass through |
| arm | supports the body tube and is used to carry the microscope |
| base | supports the microscope and is used to carry it; the bottom part of the microscope |
| body tube | light passes through this hollow tube; it also maintains the correct distance between the eyepiece lens and the objective lens |
| coarse adjustment knob | turns to raise and lower the body tube or stage for focusing; always use this knob first |
| diaphragm | changes the amount of light that enters the body tube |
| eyepiece | contains the lens you through; the top part of the microscope |
| fin adjustment knob | moves slightly and is used to sharpen the image |
| mirror or light source | is used to send light up through the hole in the stage, object, and lenses |
| nosepiece | holds the objective lenses and rotates to change the magnification |
| objective lenses | usually range from 10x to 40x magnification; located on the nosepiece |
| stage | supports the object ( microscope slide ) being viewed |
| stage clips | holds the microscope slide in place |
