1. 1-4 Tools and Procedures

2. A Common Measurement System
Metric system: based on decimals and used throughout the world
Units of the Metric system:
meter (length) m
liter (volume) L or l
gram (mass) g
o Celsius (temperature) o C

3. Microscopes
Light microscopes: produce an image by focusing light rays.
Page …using microscopes.
Electron microscopes: produce an image by focusing beams of electrons.
Examples: SEM (scanning electron microscope) TEM (transmission electron microscope)

4. Lab Techniques
Cell cultures: scientists allow one cell in a lab to reproduce to develop into a group of cells (a culture).
Cell fractionation: cells are broken into small pieces, separated and examined separately.
Chromatography: separates liquid or gas mixtures