1-4 tools and procedures. metric system appendix c p. 1069 si = le systeme international d’unites...
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1-4 Tools and Procedures
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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
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K h d (m) dk c m
King Henry Doesn't [Usually] Drink Chocolate Milk
kilo- hecto- deka- [unit] deci- centi- milli-
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12.54 km = 1 254 000 cm
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Do Worksheet
•It is important to be able to convert metric units.
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Recording and Analyzing Data
1. First record in a chart– Label the axes
2. Then put data on graphs
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Often use computers
Determine structure of molecules
Use satellite images to determine global warming
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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
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Microscopes
• Electron microscope uses magnets to focus electrons.
• Magnifies 1,000,000 X’s• Must be in a vacuum
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Laboratory Techniques
• Cell Cultures• Use a nutrient solution to grow a
group of cells
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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
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Centrifuged Blood
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• Find the unsafe lab practices
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Appendix B pp. 1066-1068
Lab Safety Quiz will be Sept. 5, 2008
Bring goggles and lock next Tuesday.