Natural Science Lecture Notes Mr. Freland Week of 8/22 Scientific Tools Beeker Graduated Cylinder Stop Watch Scale Meter Stick Astronomers use Telescopes Chemists use Spectroscopes Physicists use particle accelerators Scientific Units of Measurement (SI) Units Length meter Mass kilogram Time seconds Temperature Kelvin Electric Current ampere Amount mole Luminous candela m kg s K A mol cd Kilo Mega Giga k M G thousand million billion 1,000 1,000,000 1,000,000,000 Deci Centi Milli Micro Nano d c m u n tenth hundredth thousandth millionth billionth 0.1 0.001 0.001 0.000001 0.000000001 Scientific Notation Examples: 10^3 1,000 10^2 100 10^1 10 10^0 1 In science we represent data in different ways Line Graphs show continuous change. Independent variable is on the x axis The dependent variable is on the y axis Line Graphs show how the experiment changes through time. Bar Graphs are useful to compare sets of data to one another. Pie Graphs are used to represents fractions of a whole Precision vs. Accuracy