Slide 1 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Weight and Mass Section9.5.

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Presentation transcript:

Slide 1 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Weight and Mass Section9.5

Slide 2 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting U.S. System Units of Weight When we talk about how heavy an object is, we are concerned with the object’s weight. The most common units of weight in the U.S. measurement system are the ounce, the pound, and the ton.

Slide 3 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting Metric System Units of Length U.S. Units of WeightUnit Fractions 16 ounces (oz) = 1 pound (lb) 2000 pounds = 1 ton

Slide 4 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 9000 pounds to tons.

Slide 5 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 5 pounds to ounces.

Slide 6 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert: 38 ounces = ____ lb ____ oz

Slide 7 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Subtract 3 tons 1295 pounds from 7 pounds 1000 lb

Slide 8 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting Metric System Units of Mass Metric Units of Mass 1 kilogram (kg) = 1000 grams (g) 1 hectogram (hg) = 100 g 1 dekagram (dag) = 10 g 1 gram = 1g 1 decigram (dg) = 1/10 or 0.1 g 1 centigram (cg) = 1/100 g or 0.01 g 1 milligram (mg) = 1/1000 or g

Slide 9 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting Metric System Units of Length A large paper clip weighs approximately 1 gram. A box of crackers weights 453 grams. A kilogram is slightly over 2 pounds.

Slide 10 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 360,000 mg to grams. List the units of length in order from left to right and move from milligrams to grams. kg hg dag g dg cg mg Move the decimal point three units to the left. 360,000 mg = g or 360 g 3 units to the left

Slide 11 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Subtract 3.1 dg from 2.5 g.