The Nature of Science I. The Methods of Science -a _________ is a ______ used to help you ________ something, often something in a ________ _____ mnemonic device remember particular order My Very Energetic Mother Just Served Us Nine Pizzas Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto Kids Play Chess On Fat Green Stools Kingdom Phylum Class Order Family Genus Species

I. The Methods of Science The Nature of Science I. The Methods of Science My Cat Died Drinking Hot Kool-Aid meter milli- centi- deci- liter deka- hecta- kilo- gram meter pico- nano- milli- centi- deci- liter deka- hecta- kilo- Mega- Giga- gram 1 x 10-12 1 x 10-9 0.001 0.01 0.1 10 100 1000 1 x 106 1 x 109

I. The Methods of Science -unit cancellation The Nature of Science I. The Methods of Science -unit cancellation Multiply the Fractions: 1 1 4 3 7 3 28 4 1 1 4 1 x = x = = 1 1 1 1 5 8 4 15 1 1 6 10 1 1 10 1 x = x = = 1 2 3 1 Reciprocal What fraction would you multiply by to get 1? 3 2 1 3 2 2 3 1 x = = 1 1 Reciprocal

The Nature of Science I. The Methods of Science -unit cancellation How many hectoliters in a deciliter? 1 dL 1 L 1 hL x x = 0.001 hL 1 10 dL 100 L How many microliters in a dekaliter? 1 dkL 10 L 1 x 106 μL x x = 1 x 107 μL 1 1 dkL 1 L

The Nature of Science I. The Methods of Science -unit cancellation How many megameters in 100 centimeters? 100 cm 1 m 1 Mm x x = 1 x 10-6 Mm 1 100 cm 1 x 106 m How many picograms in 1000 kilograms? 1000 kg 1000 g 1 x 1012 pg x x = 1 x 1018 pg 1 1 kg 1 g

The Nature of Science I. The Methods of Science -unit cancellation How many milliliters in 10 microliters? 10 μm 1 m 1000 mm x x = 1 x 10-2 or 0.01 mm 1 1 x 106 μm 1 m How many nanometers in 0.0001 Gigameters? 1 x 10-4 Gm 1 x 109 m 1 x 109 nm x x = 1 x 1014 nm 1 1 Gm 1 m

II. Standards of Measurement The Nature of Science II. Standards of Measurement -the ___________ ______ of _____, or __, is founded on _____ ____ _____, which ______ be ______ _____, and are ___ _______ from _____ _____ International System units SI seven base units cannot broken down not derived other units SI base units Base quantity Name Symbol length meter m mass kilogram       kg time second s electric current ampere A thermodynamic temperature       kelvin K amount of substance mole mol luminous intensity candela cd http://physics.nist.gov/cuu/Units/units.html

II. Standards of Measurement -other __ _____ are _______ _____, The Nature of Science II. Standards of Measurement -other __ _____ are _______ _____, which are ________ by _________ _______ __ _____, and can be _______ _____ into __ ____ _____ SI units derived units obtained combining different SI units broken down SI base units Name Symbol Quantity Expression in terms of other SI units Expression in terms of SI base units square meter m2 Area m2 cubic meter m3 Volume m3 meter per second m/s Velocity m/s Newton N Force, Weight kg·m/s2 Pascal P Pressure N/m2 N/m2 Joule J Energy, Work N·m kg·m2/s2 Watt W Power J/s kg·m2/s3

II. Standards of Measurement -_______ _____ might be ____________ The Nature of Science II. Standards of Measurement -_______ _____ might be ____________ of _____ ____ ___ ____ ____, or a __________ of ____ ____ _____ and other _______ _____ derived units combinations more than one base unit combination both base units derived units http://physics.nist.gov/cuu/Units/SIdiagram.html

The Nature of Science II. Standards of Measurement Directions: For each of the derived units in the column on the left below, list the letters of all the base units used in combination to make the derived unit: 1. Newton ____ ____ ____ a. kilogram 2. Watt ____ ____ ____ b. meter 3. Hertz ____ c. second 4. Coulomb ____ ____ d. mole 5. Gray ____ ____ e. ampere 6. Volt ____ ____ ____ ____ f. Kelvin 7. Tesla ____ ____ ____ g. candela 8. Ohm ____ ____ ____ ____