Measurement

Every Measurement Consists of two things

● A number● A unit of measure

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

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

Precision and Accuracy

●Precision

●Accuracy

●Examples:

Precision and Accuracy

●Precision: The ability of a measurement to be consistently reproduced●Accuracy●Examples:

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:

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:

Precision and Acuracy

Precision and Acuracy

Scientific notation

●Base Ten●ones place decimal point●Scientific notation

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

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

● calculation (Student Planner page)● volume displacement● fluid

●Cubic decimeter - make a cubic

decimeter

Prefixes and conversions

(conversion worksheet and meter stick activity)

Micro (µ)

Prefixes and conversions

(conversion worksheet and meter stick activity)

Micro (µ)

109

106

103

102

101

10-1

10-2

10-3

10-6

10-9

Conversions within metrics

Conversions within metrics

100

10

10000200

200000

340

10

0.1

1000

20

20000

0.1

0.01

100

2000

3.4

0.010.0010.0001

0.0010.00010.00001

0.00010.000010.000001

0.020.0020.0002

0.0340.00340.00034

0.10.01

200.2

0.001 0.01 0.1 10 100 1000

0.10.01

0.00110

0.02

200

0.34

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

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

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