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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