Measurement

Every Measurement Consists of two things A number A unit of measure Number Unit

Standards A standard is: something set up and established by authority as a rule for the measure of quantity, weight, extent, value, or quality Example:The CHARLIE Stick The room is _________Charlies by _________Charlies Standard is an amount everyone agrees on Ex Feet, Meter, Liter, Quart, Gram, Pound, ex Kelly stick - length of Mr. Kelly's arms

Floor covering Activity The school board would like to replace the flooring in the room with nonslip tiling The cost of flooring is $20 per square meter 1. Form your construction company name 2. Measure the room and come up with an estimate for the cost of materials Have students calculate cost

Precision and Accuracy Examples: Percision - how close values are together Accuracy - how close to actual value Use Ex. from flooring activity

Precision and Accuracy Precision: The ability of a measurement to be consistently reproduced Accuracy Examples: Percision - how close values are together Accuracy - how close to actual value Use Ex. from flooring activity

Precision and Accuracy Precision: The ability of a measurement to be consistently reproduced Accuracy: The ability of a measurement to match the actual value of the quantity being measured Examples: Percision - how close values are together Accuracy - how close to actual value Use Ex. from flooring activity

Precision and Accuracy Precision: The ability of a measurement to be consistently reproduced Accuracy: The ability of a measurement to match the actual value of the quantity being measured Examples: Percision - how close values are together Accuracy - how close to actual value Use Ex. from flooring activity

Precision and Acuracy

Precision and Acuracy What does each diagram show?

Scientific notation Base Ten ones place decimal point 1000; 1999; 207,780; 0.078; 698; 1,400,000 Diameter of solar system 143,730,000,000 Km Diameter of Carbon Atom 0.000 000 000 154 m Powers of ten video 1 x 10^3, 1.999 x 10^3, 2.0778 x10^5, 7.8x10^-2, 6.98 x 10^2 1.4x 10^6

Significant Numbers

Distance Standard unit: measuring instruments metric stick roller ruler tape caliper Area - Student Planner page

Mass Standard unit: measuring instruments balance electronic scale

Volume Standard unit: measuring Cubic decimeter - make a cubic calculation (Student Planner page) volume displacement fluid Cubic decimeter - make a cubic decimeter

Prefixes and conversions (conversion worksheet and meter stick activity) G 10^9, M 10^6, K 10^3, H 10^2 , Dk 10^1, Dc 10^-1, c 10^-2 m 10^-3, micro 10^-6 n 10^-9 Micro (µ)

Prefixes and conversions (conversion worksheet and meter stick activity) 109 10-1 106 10-2 G 10^9, M 10^6, K 10^3, H 10^2 , Dk 10^1, Dc 10^-1, c 10^-2 m 10^-3, micro 10^-6 n 10^-9 103 10-3 102 Micro (µ) 10-6 101 10-9

Conversions within metrics Have student fill-in

Conversions within metrics 0.001 0.01 0.1 10 100 1000 0.0001 0.001 0.01 0.1 10 100 0.00001 0.0001 0.001 0.01 0.1 10 0.000001 0.00001 0.0001 0.001 0.01 0.1 0.01 0.1 10 Have student fill-in 100 1000 10000 0.0002 0.002 0.02 0.02 20 200 0.2 20 200 2000 20000 200000 0.00034 0.0034 0.034 0.34 3.4 340

Relationship between distance, volume, and mass 1 cm3 = 1 mL 1 mL of water = 1 g Compare cm3, Dcm3, m3

Converting between systems equality/conversion factor method an equality is: a conversion factor is: Conversions in student planner 1 inch = 2.54 cm (1inch/2.54 cm, 2.54 cm/1 inch) 12in *2.54cm/in = 30.48cm Do some examples

Converting between systems equality/conversion factor method an equality is: a state in which two things or values are always equal a conversion factor is: Conversions in student planner 1 inch = 2.54 cm (1inch/2.54 cm , 2.54 cm/1 inch) 12in *2.54cm/in = 30.48cm Do some examples

Converting between systems equality/conversion factor method an equality is: a state in which two things or values are always equal a conversion factor is: The ratio of a measurement in one unit to the equivalent numerical value in another unit Conversions in student planner 1 inch = 2.54 cm (1inch/2.54 cm , 2.54 cm/1 inch) 12in *2.54cm/in = 30.48cm Do some examples