1-4 Tools and Procedures

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

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

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

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

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

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

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

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

Centrifuged Blood

Find the unsafe lab practices

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