1. 1-4 Tools and Procedures

2. Metric System Appendix C p. 1069 SI = Le Systeme International d’Unites Based on units of ______ 10 What is the basic unit of: Mass length liquid volume Grams meter liter

5. Do Worksheet It is important to be able to convert metric units.

6. Recording and Analyzing Data 1. First record in a chart –Label the axes 2. Then put data on graphs

7. Often use computers Determine structure of molecules Use satellite images to determine global warming

8. Microscopes Light Microscopes use lenses to bend light to focus and enlarge the image Can enlarge up to 1000 X’s Can view living things Object must be thin enough for light to get through it

9. Microscopes Electron microscope uses magnets to focus electrons. Magnifies 1,000,000 X’s Must be in a vacuum

10. Laboratory Techniques Cell Cultures Use a nutrient solution to grow a group of cells

11. Cell Fractionation 1. Break cells with a blender. 2. Broken cell bits added to liquid in a test tube. 3. Test tube put into a centrifuge. 4. Spin to separate dense parts near bottom of tube. Separating DNA

12. Centrifuged Blood

13. Find the unsafe lab practices

14. Appendix B pp. 1066-1068 Lab Safety Quiz will be Sept. 5, 2008 Bring goggles and lock next Tuesday.