Measurement and Tools Understanding Measurement and Tools

Measurement The process of determining the size, amount or extent of something

Rules and Scales measure length, width and thickness standard 12 inch rule mechanical rule/scale drafter’s rule/scale architect rule/scale machinist’s rule/scale metric rule yard stick meter stick tape measure

Calipers Measure diameters and length on either the inside or outside of an object

Micrometer Very precise tools for measuring the length, thickness or diameter of small objects.

Squares Measure or Lay out Perpendicular Lines (lines at 90 degree angles) T-Square try square framing square combination square center square

Protractors Measure angles from 0 to 180 degrees Measure length along their straight edge

Weight Scales weight scales sensitive scientific scales analog/digital, manual or electronic Measure weight or mass

Calibrated Containers measure volume measure ingredients for recipes measuring spoons, measuring cups scientists use lab beakers

Precision ~vs~Standard Precision measurements are precise and exact such as in eyeglasses, computer parts, medicine Standard measurements have some degree of inaccuracy such as plywood, shoe sizes, table heights

Temperature Fahrenheit freezing point of water = 32 degrees boiling point of water = 212 degrees 180 degrees between boiling/freezing

Temperature Celsius freezing point of water = 0 degrees boiling point of water = 100 degrees 100 degrees between boiling/freezing

United States Customary System Length in inches Weight by pound Volume by the quart Temperature in degrees Fahrenheit

Metric Base Units Length = meter Weight = gram Volume = liter Temperature = Celsius

US Measure for Length 12 inches=1 foot 3 feet = 1 yard 1,760 yards = 1 mile 5,280 feet = 1 mile

Metric Length Base unit is the meter 1000 millimeters = 1 meter 100 centimeters = 1 meter 1 kilometer = 1000 meters

US Measure for Volume 8 ounces = 1 cup 2 cups = 1 pint (16ounces) 2 pints = 1 quart (32 ounces) 4 quarts = 1 gallon (128 ounces)

Metric Volume Base unit is the liter 1000 cubic centiliters = 1 liter 1000 milliliter = 1 liter

US Measures for Weight 16 ounces = 1 pound 2,000 pounds = 1 ton

Metric Weight Base unit is the gram 1 kilogram = 1000 grams 1 metric ton = 1000 kilograms

Metric Prefixes “There is a logical progression from smaller units to larger ones, since all sizes of units are based on ten.” (R3 p.119) Technology Systems

Metric Measurement Prefixes kilo = x 1000 hecto = x 100 deka = x 10 deci = x.1 centi = x.01 milli = x.001