1-4 Tools and Procedures
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
K h d (m) dk c m
King Henry Doesn't [Usually] Drink Chocolate Milk
kilo- hecto- deka- [unit] deci- centi- milli-
12.54 km = 1 254 000 cm
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. 1066-1068
Lab Safety Quiz will be Sept. 5, 2008
Bring goggles and lock next Tuesday.