1
The Scientific Method
2
Using and Expressing Measurements
Scientific notation is written as a number between 1 and 10 multiplied by 10 raised to a power.
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Accuracy, Precision, and Error
Accuracy is how close a measurement is to the actual or true value of whatever is measured.
Precision is how close a series of measurements are to one another.
4
Accuracy, Precision, and Error
5
Significant Figures in Measurements
1. Every nonzero digit is significant. (1.48 has 3 sig figs)
2. Zeros between nonzero digits are significant. (10605 has 5 sig figs)
3. Zeros appearing before nonzero digits are not significant. (0.00034 has 2 sig figs)
6
Significant Figures in Measurements
4. Zeros at the end of a number to the right of a decimal place are always significant. (12.00 has 4 sig figs)
5. Zeros at the end of a number without a decimal are not significant. (12500 has 3 sig figs)
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Significant Figures in Calculations
Addition and Subtraction: the answer has the same number of decimal places as the measurement with the least number of decimal places.
Multiplication and Division: the answer has the same number of significant figures as the measurement with the least sig figs
8
Measuring with SI Units
9
Units and Quantities
10
Units and Quantities
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Units and Quantities
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Units and Quantities