Lab Equipment and Uses Measurement Using Lab Equipment Notes: · International System of Units, SI
· Base 10
· 6 General Types of Measurement:
Length, Volume, Mass, Temperature, Weight,Time
Name Spring Scale Image Use(s) Measuring Weight or Force in Newtons. Weight is the measure of the pull of gravity on something. Graduated Cylinder Erlenmeyer Flask Hold Liquid, Approximate volume but not for precise measuring Beaker Hold Liquid, Approximate volume but not for precise measuring Stopwatch Measure precise volumes. Volume is a measure of how much space something occupies. Can be measured LxWxH or by displacement method for irregularly shaped objects. Units are usually liters(L), milliliters(mL) or cm3 or m3. 1mL = 1cm3 Measures time in seconds. Time is a measure of how long. Name Triple Beam Balance Image Use(s) To measure mass. Mass is the amount of matter in something. The base unit of mass is the gram. Kilograms are commonly used. Ring Stand and Ring Clamp Support Bunsen Burner Crucible Dropper Pipet Funnels Heat source To heat small amounts of chemical To transfer small droplets of liquid To pour or transfer liquid Name Scoopula Meter Stick and Metric ruler Image Use(s) To scoop chemicals To measure distance. Metric system base unit of distance is the meter. Centimeters, millimeters, kilometers also commonly used. Test tube and test tube holder Wire Gauze Support of glassware when heating over a flame. Watch Glasses Used to hold chemicals. Multifunctional Test tube rack Holds test tubes. Thermometer Stir Rod Measure temperature. Temperature is the measure of the average kinetic energy in something. We use Celsius or Kelvin. No prefixes with temperature measurements. Stir liquids Forceps Test tube used to hold liquids or solids. Holder used to hold the test tube. Picking up small objects Prefixes for Powers of Ten Prefix tera Notation 1012 Meaning 1,000,000,000,000 109 1,000,000,000 106 1,000,000 103 1,000 hecto Symbol T G M K H 102 100 deca da 101 10 Base Unit liter, meter, gram 100 1 deci d c m µ n p 10‐1 0.1 10‐2 0.01 10‐3 0.001 10‐6 0.000001 10‐9 0.000000001 10‐12 0.000000000001 giga mega kilo centi milli micro nano pico Which is larger??
a. kilometer or centimeter?
b. decameter or decimeter?
c. micrometer or centimeter?
d. millisecond or gigasecond?
e. picoliter or nanoliter?
f. hectometer or kilometer?
g. meter or millimeter?
Answers a. kilometer
Scientific notation is a way of writing numbers that accommodates values too large or small to be conveniently
written in standard decimal notation.
In scientific notation all numbers are written like this:
a × 10b
Where a represents the significant figures in the value (a is always a number less than 10) and b represents the power of 10. 2 300 3 x 10
200000 2 x 105 0.0000004 4 x 10‐7 0.00005099 5.099 x 10‐5 50.04000 5.004 x 101 23.0 2.3 x 101 30 3 x 101 Convert the following values out of scientific notation: 1.009 x 103 1009 5.7 x 10‐5 0.000057 3.8777 x 103 6.000 x 10‐9 1.0 x 103 1.00006 x 104 9.9998 x 100 3877.7 0.000000006 1000 10000.6 9.9998