1. Cycling of Matter in Living Systems

2. To be able to study cells and increase our knowledge of cells there had to be new developments in microscope technology and staining techniques Microscopes were built to see the building blocks of life but cells are not easily seen unless something is done to them (ie staining or illumination)

3. Viewing through a water filled-glass sphere Observed magnification, but did not put it to practical use

5. Two lens system Magnification extending the reach of the human eye

6. Three lens system Magnification allowing for the observation of cells

7. Single lens system similar to a magnifying glass Able to see moving microorganisms

8. Uses two or more curved lenses and a light source to magnify objects

10. Uses beam of electrons to produce images with fine detail

11. TEM-Transmission electron microscope SEM-Scanning electron microscope

12. Provides information about molecules on the cell surface

13. Uses laser beams; the living, transparent cell can be viewed in 3D

14. More magnifying power than an electron microscope Produces 3D images of molecules such as DNA

16. Provides contrast for observing individual structures and kills cells

17. Ability to distinguish between two structures that are very close together