1. Measure This

2. Space, the final frontier. The measurement of the space taken up by a sample of matter is the volume. We measure the volume of liquids in graduated cylinders. We measure the volume of gases in volumetric tanks. We measure volume for regular shaped solids by multiplying the length times the width times the height. l*w*h = v We measure volume for irregular shapes by liquid displacement. v f – v i = v

3. Volume Readings- Meniscus- the curvature of a liquid surface in a solid container. We measure the volume of a liquid at the bottom of the meniscus. The SI unit for liquid volume is the Liter (L)= 1000 cm 3. Measuring a regular shaped solid results in a cubic unit. Example: 3cm * 2cm* 1cm = 6cm 3 1mL=1cm 3 =1cc

4. Mass- Mass is the quantity of matter. Even if something is smaller than another object, it can contain more mass if it is made of more matter. Mass is a fundamental property of an object and does not change when a force is applied (i.e. gravity). Mass is measured on a balance. The SI unit of mass is the Kilogram (kg).

5. I’m not stepping on that scale… Mass is not weight, but it is related. Weight is the measure of gravity’s force on a mass. F=ma, so Weight=mass times gravity’s acceleration. Where gravity’s force changes, so does weight, but not the mass of an object. http://www.exploratorium.edu/ronh/weight/

6. Système Internationale d’Unités The International System of Units or SI Units are units that have been agreed upon by scientists as the standard for measurements. The metric system is the basis of the SI Units. NameAbbreviationQuantity (symbol) MetermLength (l) KilogramkgMass (m) SecondsTime (t) KelvinKThermodynamic Temperature (T) MolemolAmount of Substance (n) AmpereAElectric Current (I) CandelacdLuminous Intensity (I v )

7. Oh metric system-you’re a perfect ten! The metric system is a system of prefixes that utilize base ten to create scale. This means, that converting between units within the metric system is as simple as moving a decimal point one direction or another. -because numbers and place values are in base ten. MegaKiloHectoDekaBaseDeciCentiMilliNanoPico Mkhda or Dg, L, mdcmnp 10 6 10 3 10 2 10 1 110 -1 10 -2 10 -3 10 -9 10 -12

8. Converting to Metric- Converting from the American/English measurement system to the metric system, and vice versa, requires a conversion factor and dimensional analysis. The rules of dimensional analysis are easy 1. Start with the number and unit you are given (do not start with a conversion factor which usually looks like a fraction). 2. The units on top of a fraction must be canceled out by the same unit on the bottom of a fraction and the unit given MUST be canceled out first. 3. Apply conversion factors until every unit cancels except the unit you are looking for.

9. Example- A recipe for French Boulaise calls for 5kg of beef. How many pounds of beef do you need to purchase if 2.2kg=1lbs? 2.27lbs

10. Measuring up…. Measurements can be linked through common units and related equations. Density is one property that can be used to ID a substance. Density is the amount of mass in a given volume. D=m/v, Density=mass/volume Density has the SI units of g/mL

11. Example- http://www.youtube.com/watch?v=hgnlu-kpdOs The statue of gold that Indiana Jones steals by replacing the it with a bag of sand, presumably of the same mass, was approximately 1L in volume. The density of pure gold is 19.3g/mL. Sand has a density of 1.602g/mL. What volume, in L, of sand would Indiana Jones need to replace the statue without setting off the booby trap? 12.05L of sand