1. Microscopes

2. Rules for using a microscope 1.Always carry the microscope with 2 hands 2.Always start with the lowest power 3.Return to the lowest power when  Changing slides  lost object  Putting away 4.Only use fine adjustment knob with the high power 5.When putting away  Wrap cord loosely around base  Stage at the bottom

3. Ocular Body Tube Revolving Nosepiece Objectives Stage Diaphragm Coarse Focus Fine Focus Arm Stage Clamp Light Base

4. The area of the object that you actually see when looking through the microscope Field of view (diameter of view) Object 4X 10x 40x

5. Depth of view – how deep into the drop or specimen you can see 4x slide Cover slip specimen Objective lens 10x 40x

6. how much space between the objective and the slide 4x Working distance Stage Working distance 10x 40x

7. Illumination The amount of light that is able to pass through the objective 4x It gets dimmer 10x 40x

8. Calculating magnification Multiply the ocular magnification by the objective magnification of the power you are using Ex: Ocular 5x and objective is 10x 5 X 10 = 50x total magnification

9. Discovery of cells Anton van Leeuwenhoek –Invented the first microscope – 1600’s

10. –Viewed cork cells (dead wood) –Named them “cells” Robert Hooke

11. Matthias Schleiden 1830’s observed plant cells All plants are composed of cells

12. Theodore Schwann Views animal cells Concluded all animals are made of cells

13. Cell Theory 1.All living things are made up of cells 2.All cells come from preexisting cells 3.Cells are basic units of structure and function of life