SI System Metric The Metric System or System
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SI System / Metric • The Metric System or System International • Based on natural lengths of the earth, the weight of water, and the decimal system • Familiar names: Centimetres, liters, metric tonnes, cm 2, kilometres, hectares, m 3, kilograms • Based on the Powers of 10 • Invented in France 200 years ago • Introduced to Canada in the 1970 s
Imperial System • Used in USA and used to be used in Britain • Developed from measurements decided upon by kings and queens – they determined the length of a yard • Familiar names: Foot, yard, mile, bushel, acre, gallon, cup, ounces, pounds, • No consistent way to convert, just have to memorize the relationships between them Ex. 1 foot – 12 inches
Imperial Conversion Factors Linear Units • 1 inch is divided into 16 parts or 1/16 ths • 1 foot = 12 inches • 1 yard = 3 feet or 36 inches • 1 mile = 5280 feet or 1760 yards Weight • 1 pound = 16 ounces • 1 ton = 2000 pounds Capacity • 1 cup = 8 ounces • 1 pint = 2 cups • 1 quart = 4 cups • 1 gallon = 4 quarts Area • 1 ft 2 = 144 inches 2 • 1 yard 2 = 9 ft 2 • 1 mile 2 = 27878400 ft 2 • 1 mile = 640 acres
Converting in the Metric System Method 1: Use the Prefix system For each step ÷ 10 kilo hecto deca Base unit deci Metre 2 For each step x 10 centi milli
Method 2: Staircase Method:
Method 3: Unit Analysis Method:
