2. MEASUREMENT & SCIENTIFIC TOOLS

3. The International System Of Units The International System of Units (SI Units)- the internationally accepted system for measurement. They use a standard of measurement called base units and a set of prefixes to tell the size of the unit. Easy to convert one SI unit to another because SI is based on units of ten

4. Common SI Units & Conversions Meter (m)- the basic SI unit for length(distance) Grams (g)- The basic SI unit for mass. Mass is a measure of the amount of matter in an object Volume- the amount of space matter occupies. Solids – cubic meters (m 3 ) Liquids- liters (l) Temperature-measure of how hot or cold something is. measure in: Celsius(C) Kelvin (K)

5. KittensHateDogsBecauseDogsCan'tMeow KILOHEKTADEKABASEDECICENTIMILLI.005 km.05 hkm.5 dkm5m 50 dg500 cm 5,000 mm 7cm 20 ml 15g 30 km

6. KittensHateDogsBecauseDogsCan'tMeow KILOHEKTADEKABASEDECICENTIMILLI.005 km.05 hkm.5 dkm5m 50 dg500 cm 5,000 mm.00007.0007.007 dkm.07m.7dm 7 cm70 mm.00002.0002.002 dkl.02 l.2 dl 2cl 20 ml.015.15 1.5 15g150dg 1,500 cg 15,000 mg 30 km 300 3,000 30,000300,000 30,000,000 300,000,000

7. Significant Figures The # of digits in a measurement that you know with a certain degree of reliability. Limit to 2 significant figures after the decimal. Ex: 127.654321 = 127.65 56.28765 = 56.29

8. Scientific Tools  Tool- anything that helps you do a task.  Measuring Lengths & Distances (m): Rulers Meter sticks tape measure  Measuring Volume of a liquid (l): Graduated cylinders Beakers Flasks Test tubes

9.  Measuring Mass of an object (grams-g)  Triple beam balance  Measuring Temperature ( Celsius or Kelvin)  Thermometer  Measuring time ( seconds(s), min (m)):  stopwatch

10.  Safety Tools: Goggles Lab coats Gloves tongs Tweezers  Analyzing Tools: Pencil/pens Log book Computers Calculator Camera

11.  Other Tools: Eye droppers Microscope Magnifying glass Hot plates Trays Scalpels Glass stirrer Mortar and pestle Binoculars compass