Data analysis(chapter 2)•SI units and the metric system

▫Base units Time (sec) Length (m) Mass (kg) Temperature (Kelvin) Derived base units

Volume (m3) Density (g/cm3)

Prefixes

Scientific notation

•Review how to add, subtract, multiply, and divide

Dimensional analysis

Accuracy (the nearness to the correct answer) and Precision (how close a series of measurements are to each other)

Percent error

•|Accepted – Measured| x 100

Accepted

Significant figures

•1. Non-zero digits are always significant. •2. Any zeros between two significant

digits are significant. •3. A final zero or trailing zeros in the

decimal portion ONLY are significant.

Rules for rounding, adding, subtracting, multiplying, and dividing

Graphing

•Circle graph – data is based on 100%•Bar graph – used to compared unique sets

of data•Line graph – most common