mals: Nature of the Metric Syste lished in 1795, to include the d gram. With prefixes of centi, ca, hecto, and kilo. decimal metric system has gone anged as the basis for the mode national System of Units or SI short, that we use in SCIENCE.
Dec 29, 2015
Decimals:The Nature of the Metric SystemEstablished in 1795, to include the meter,liter, and gram. With prefixes of centi, deci, deca, hecto, and kilo.
The decimal metric system has gone unchanged as the basis for the modernInternational System of Units or SI for short, that we use in SCIENCE.
Why Decimals?Which column would you rather add?Inch – Pound Units1 yard, 2 feet, 3-1/4 inches1 foot, 11 3-14 inches2 feet, 5-1/2 inches3 yards, 1 foot, 6-5/8 inches_______________________? Yards, ? Feet, ? inches
Metric Units1.607 meters0.589 meters0.749 meters3.216 meters_______________? meters
6 yards, 2 feet, 2 -9/16 inches 6.161 meter
Why Decimals?A room measures 15 ft 3-3/4 in by 21 ft 7-1/2 in( 4.667 m by 6.591 m )
What is the floor area in square yards?What is the floor area in square meters?
36.79 sq yds
30.76 sq meters
Why Decimals?In designing a calendar you wish to divide an area of7-1/4 in by 11 inches ( 184 mm by 279 mm) into 35 rectangles;
That is divide 7-1/4 in by 5 and divide 11 in by 7.
What are the dimensions of each rectangle in inches?
What are the dimensions of each rectangle in millimeters?
1-29/64 in by 1-37/64 in
36.8 mm by 39.9 mm
Flasks - used for liquid volumeErlenmeyer, Florence - How do they differ? How does the shape influence how it is used?
Volume of irregular shaped objects by the displacement method. Step 1: Calibrate cylinder and measure 15 mL
Finding volume of rock (irregular shaped object)
Starting volume = 15 mL Ending volume = 16 mL Volume of object (rock) =
16 mL – 15 mL = 1 mL
Volume of irregular shaped objects by the displacement method. Step 1: Calibrate cylinder &measure 15 mL
Finding volume of screw (irregular shaped object)
Starting volume = 15 mL Ending volume = 16 mL Volume of object (screw) =
16 mL – 15 mL = 1 mL
Finding volume of metal weight (irregular shaped object)
Starting volume = 7.0 mL Ending volume = 8.2 mL Volume of object (screw) =
8.2 mL – 7.0 mL = 1.2 mL
Using cylinder tips Takes practice Read meniscus at eye level (use of a
background helps viewing) Calibrate cylinder Pour carefully and slowly Use dropper to add in last few drops Check calibrations and all
measurements