measurement & scientific tools
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MEASUREMENT & SCIENTIFIC TOOLS. The International System Of Units. The International System of Units (SI Units) - the internationally accepted system for measurement. - PowerPoint PPT PresentationTRANSCRIPT
MEASUREMENT &
SCIENTIFIC TOOLS
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
Common SI Units & ConversionsMeter (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 (m3)• Liquids- liters (l)
Temperature-measure of how hot or cold something is.measure in:
• Celsius(C)• Kelvin (K)
Kittens Hate Dogs Because Dogs Can't Meow
KILO HEKTA DEKA BASE DECI CENTI MILLI
.005 km .05 hkm .5 dkm 5m 50 dg 500 cm 5,000 mm
7cm 20 ml
15g
30 km
Kittens Hate Dogs Because Dogs Can't Meow
KILO HEKTA DEKA BASE DECI CENTI MILLI
.005 km .05 hkm .5 dkm 5m 50 dg 500 cm 5,000 mm
.00007 .0007 .007 dkm .07m .7dm 7 cm 70 mm .00002 .0002 .002 dkl .02 l .2 dl 2cl 20 ml
.015 .15 1.5 15g 150dg 1,500 cg 15,000 mg
30 km 300 3,000 30,000 300,000 30,000,000 300,000,000
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
Scientific ToolsTool- 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
Measuring Mass of an object (grams-g)Triple beam balance
Measuring Temperature ( Celsius or Kelvin)Thermometer
Measuring time ( seconds(s), min (m)):stopwatch
Safety Tools:• Goggles• Lab coats• Gloves • tongs• Tweezers
Analyzing Tools:• Pencil/pens• Log book• Computers• Calculator• Camera
Other Tools:• Eye droppers• Microscope• Magnifying glass• Hot plates• Trays• Scalpels• Glass stirrer• Mortar and pestle• Binoculars• compass