Measurement/Calculation. Units of Measure. Metric System. based on powers of ten, so it’s easy to convert between units. Remember: KING HENRY DANCED BEFORE DAWN COUNTING MONEY Or KING HENRY DIED BY DRINKING CHOCOLATE MILK. Units. How to use. Right. Kilo. Hecto. Deka. BASE. Deci.
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Units of Measure
7 000 000
(derived units are calculated from base units)
Scientific Notation/Accuracy &Precision
3.2 X 10-3
1.53 X 107
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Are the following groups of measurements accurate, precise, both, or neither?
Qualitative: a descriptive measurement (quality); does not involve numbers
Quantitative: a numerical measurement (quantity)
Answer should have 1 decimal place
= 1.219469 g/mL
Answer should have 3 significant figures
V = 825 cm3
D = 13.6 g/cm3
m = ?
m = DV
m = (13.6 g/cm3)(825cm3)
m = 11 220 g=11 200g
Graphing is an important tool for expressing data so that it is easier to read and interpret
Rules for graphing:
--place the manipulated/independent variable (the one that was changed) on the x axis.
--place the dependent/responding variable (the results of that change) on the y axis.
y scale = largest y value – smallest y value x scale = largest x value – smallest x value
# of lines on the y axis # of lines on the x axis
The graph should cover at least ¾ of the grid