CHAPTER 7 Review Exercises 449 7.1 In Exercises 1– 6, indicate the meaning of the prefix. 1. Centi 1 100 of basic unit 2. Kilo 1000 × basic unit 3. Hecto 100 × basic unit 4. Milli 1 1000 of basic unit 5. Deka 10 × basic unit 6. Deci 1 10 of basic unit In Exercises 7–12, change the given quantity to the quantity indicated. 7. 80 mg to grams 0.08 g 8. 0.52 km to decimeters 5200 dm 9. 5700 cm to hectometers 0.57 hm 10. 1 000 000 mg to kilograms 1 kg 11. 4.62 k to liters 4620 12. 192.6 dag to decigrams 19 260 dg In Exercises 13 and 14, arrange the quantities from smallest to largest. 13. 2.67 k , 3000 m , 14 630 c 3000 m , 14 630 c , 2.67 k 14. 0.047 km, 4700 m, 47 000 cm 0.047 km, 47 000 cm, 4700 m 7.2, 7.3 In Exercises 15–20, indicate the metric unit of measurement that would best express the following. 15. The temperature of the water in an ocean Degrees Celsius 16. The length of a toothpick Centimeters 17. The area of a typical garden Square meters 18. The volume of a bottle of water Milliliters or liters 19. The mass of a car Kilograms or tonnes 20. The distance from Earth to the moon Kilometers In Exercises 21 and 22, (a) first estimate the following in metric units and then (b) measure with a metric ruler. Record your results. 21. Your height a) Answers will vary. b) Answers will vary. 22. The length of a new pencil a) Answers will vary. b) Answers will vary. In Exercises 23–28, select the best answer. 23. The distance between Buffalo, New York, and Tampa, Florida, is about a) 20 000 cm. b) 2000 km. c) 20 000 m. (b) Review Exercises CHAPTER 7 24. The mass of a sports utility vehicle is about a) 1300 kg. b) 13 000 g. c) 130 000 mg. (a) 25. The volume of a jug of water is about a) 0.1 k . b) 0.5 . c) 4 . (c) 26. The area of a large classroom floor may be a) 200 m .2 b) 0.5ha. c) 0.02 km .2 (a) 27. The temperature on a hot summer day in Florida may be a) 34°C. b) 55°C. c) 25°C. (a) 28. The height of a cell phone tower is about a) 300 cm. b) 30 m. c) 3 km. (b) 29. Convert 1800 kilograms to tonnes. 1.8 t 30. Convert 9.2 t to grams. 9 200 000 g 31. The temperature on a thermometer is 24°C. What is the Fahrenheit temperature? 75.2°F 32. If the room temperature is 68°F, what is the Celsius temperature? 20°C 33. If your outdoor thermometer shows a temperature of 6°F, − what is the Celsius temperature? 21.1°C ≈ − 34. If Joshua’s body temperature is 39°C, what is his Fahrenheit temperature? 102.2°F 35. Lincoln Memorial Reflecting Pool The Lincoln Memorial Reflecting Pool in Washington, D.C. has a length of 618 meters and a width of 51 meters. Determine the surface area of the reflecting pool in square meters. 31 518 m2 36. Basketball Center Circle The diameter of the center circle of a basketball court is 3.66 meters. Determine the area of the circle to the nearest hundredth of a square meter. 10.52 m2 37. a) Hot Tub Volume What is the volume of water in a full circular hot tub that has a diameter of 2 m and has a depth of 1 m? Round your answer to the nearest hundredth of a cubic meter. 3.14 m3 b) What is the mass of the water in kilograms? 3140 kg 38. Computer Monitor A rectangular computer screen measures 33.7 cm by 26.7 cm. Determine the screen’s area in a) square centimeters. 899.79 cm2 b) square meters. 0.089 979 m2
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