1. M ETRIC M EASUREMENTS Objective: Learn to identify, convert, and compare metric units.

2. M ETRIC M EASUREMENTS

3. G-L A ND 1-gallon (gal)=4-quarts (qt)= 8-pints (pt)=16-cups (c)= 128 ounces (oz)8oz=1 cup

4. C HOOSING THE A PPROPRIATE M ETRIC U NITS Choose the most appropriate customary unit for each measurement. Justify your answer. A. The length of a car Meter-a car can be measured with several lengths of a doorway B. The mass of a skateboard Kilograms-a skateboard’s mass can be measured with textbooks C. The recommended dose of a cough syrup Milliliters-a dose of cough syrup can be measured by the amount of liquid in an eyedropper.

5. M ETRIC U NITS BASE ON POWERS OF 10 10 3 =1,00010 2 =10010 1 =1010 0 =1 ThousandsHundredsTensOnes Kilo-Hecto-Deca- Base Unit Meter/Liter/Gram 1/10 1 =1/10=0.11/10 2 =1/100=0.011/10 3 =1/1000=0.001 TenthsHundredthsThousandths Deci-Centi-Milli- To convert metric units, multiply or divide by a power of 10 Multiply to convert to smaller unit Divide to convert to larger unit

6. T RY T HIS !!! 510 cm to meters2.3 L to milliliters Convert each measure. 100 cm=1m So divide by 100 Move decimal 2 places left 1 L=100mL So multiply by 1000 Move decimal 3 places right

7. T RY T HIS !!! Anna and Weston are measuring the mass of rocks in science class. Anna’s rock has a mass of 480 g. Weston’s rock has a mass of 0.05 kg. Whose rock has the greater mass? How much greater is it? Since 0.48 kg>0.05 kg. Anna’s rock has the greater mass? Write the proportion Find the cross product Solve for x Subtract to find how much greater The mass of Anna’s rock is 0.43 kg greater the Weston’s rock.

8. E XAMPLE 1: Choose the most appropriate metric unit for each measurement. Justify your answer. A. The amount of water a runner drinks each day B. The length of a boat C. The mass of a car

9. E XAMPLE 2: Convert each measure. A. 530 cL to liters B. 1,070 g to milligrams

10. E XAMPLE 3: Addison buys one pumpkin that has a mass of 3 kg and another that has a mass of 2,150 g. Which pumpkin has the greater mass? How much greater is its mass?