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EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.

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Presentation on theme: "EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain."— Presentation transcript:

1 EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.

2 EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain. The mass of a book is about 1 kg, so 10.3 kg is the mass of about 10 books.

3 EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain. The mass of a book is about 1 kg, so 10.3 kg is the mass of about 10 books. The mass of a dog is closer to the mass of 10 books, so the item is a dog

4 EXAMPLE 2 Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters. Choosing Units of Capacity

5 EXAMPLE 2 Choosing Units of Capacity Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters. a. bucketb. teaspoon

6 EXAMPLE 2 Choosing Units of Capacity Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters. a. bucketb. teaspoon SOLUTION a.The capacity of a bucket is closest to the capacity of a large bottle of water. You should use liters.

7 EXAMPLE 2 Choosing Units of Capacity Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters. a. bucketb. teaspoon SOLUTION a.The capacity of a bucket is closest to the capacity of a large bottle of water. You should use liters. b.The capacity of a teaspoon is closest to the capacity of an eyedropper.You should use milliliters.

8 EXAMPLE 3 Choosing Metric Units Choose an appropriate metric unit to measure the item.

9 Choosing Metric Units Choose an appropriate metric unit to measure the item. a. mass of an eraser EXAMPLE 3 b. capacity of a bottle of nail polish

10 Example 3 Adding Whole NumbersChoosing Metric Units a. The mass of eraser is much greater than onemilligram and much less than one kilogram. So, you should use grams. EXAMPLE 3 SOLUTION

11 Example 3 Adding Whole NumbersChoosing Metric Units a. The mass of eraser is much greater than onemilligram and much less than one kilogram. So, you should use grams. b. The capacity of a bottle of nail polish is much less than one liter or one kiloliter. So, you should use milliliters. EXAMPLE 3 SOLUTION

12 GUIDED PRACTICE for Examples 1, 2, and 3 1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain.

13 GUIDED PRACTICE 1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain. mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse. for Examples 1, 2, and 3

14 GUIDED PRACTICE 1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain. Choose an appropriate metric unit to measure the item. 2. capacity of a wheelbarrow 3. mass of a test tube 4. mass of a car 5. capacity of a thermos mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse. for Examples 1, 2, and 3

15 GUIDED PRACTICE 1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain. Choose an appropriate metric unit to measure the item. 2. capacity of a wheelbarrow 3. mass of a test tube 4. mass of a car 5. capacity of a thermos mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse. liters grams kilograms liters for Examples 1, 2, and 3


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