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## Unit 2 - Measurement

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**Unit 2 - Measurement**Review**1. What temperature scale has no negative temperatures?**A. Fahrenheit B. Celsius C. Kelvin D. None of the above**2. What is the quantity 0.0075 meters expressed in**centimeters? A. .75 cm B. .075 cm C. 75 cm D. 7.5 cm**3. Which of the following is NOT correct?**A. 100 cg = 1 g B. 10 kg = 1 g C. 1000 mg = 1 g D. 1,000,000 g = 1 Mg**4. The chief advantage of the metric system over other**systems is ___. A. It is based on the power of 10. B. It is based on the power of 100. C. It is known and used world wide. D. Both A and C**5. When multiplying and dividing measured quantities, what**is the rule for significant figures? A. Your answer has the same number of sig figs as the quantity with the least number of sig figs. B. Your answer has the same number of sig figs as the quantity with the most number of sig figs. C. Your answer has the same number of sig figs as the quantity with the least number of decimal places. D. Your answer has the same number of sig figs as the quantity with the most number of decimal places.**6. The expression of 5008 km in scientific notation is ____.**A. 5008 x 100 B. 5.008 x 102 C. 50.08 x 103 D. 5.008 x 103**7. What is the measurement of absolute zero measured in oC?**A. 273 oC B. -273 oC C. 0 oC D. 373 oC**8. Which of the following measurements is expressed to three**significant figures? A. .003 B. .00300 C. .030 D. 1.0300**9. Density is found by dividing ____.**A. Mass by volume. B. Volume by mass C. Mass by area D. Area by volume**10. Which of the following is the smallest?**A. 1 liter B. 1 milliliter C. 1 microliter D. 1 megaliter**11. The closeness of a measurement to its true value is a**measure of its __. A. precision B. accuracy**12. What is the product of 2.2 mm and 5.00 mm, using the**correct number of significant figures? A. 11 B. 11.0 C. 10. D. 10**13. Express the sum of 7.68 m and 5.0 m, using the correct**number of significant figures. A. 13 B. 12.6 C. 12.7 D. 12.68**14. What is the SI base unit of mass?**A. gram B. kilogram C. milligram D. pound**15. Express in scientific notation the following: 0.000 000**000 154 m. A. 1.54 x 10-11 B. 1.54 x 1010 C. 1.54 x 10-10 D. 154 x 10-12**16. Which group of measurements is most precise?**A. 2 g, 3 g, 4 g B. 2 g, 2.5 g, 3 g C. 2.10 g, 2.11 g, 2.09 g D. 20 g, 30 g, 40 g**17. What is the value 111.009 mm rounded off to four**significant figures? A. 111.009 B. 111.1 C. 111 D. 111.0**18. What is the volume of 45.6 g of silver, if the density**is 10.5 g/mL? A. 4.34 g B. .230 g C. 479 g D. 1.00 g**19. Which of the following units is NOT an official SI base**unit? A. kilogram B. meter C. liter D. ampere**20. In the measurement 0.503 L, which digit is the estimated**digit? A. The 5 B. The 0 C. The 3 D. All of them are estimated**21. What is the temperature 128 K expressed in degrees**Celsius? A. 75 B. -208 C. 401 D. -145**22. Round off the value 0.003 095 m to three significant**figures. A. .00309 B. .00310 C. .00300 D. .003**23. What is the density of an object having a mass of 4.0 g**and a volume of 39.0 cubic centimeters? A. .103 g/cm3 B. .1026 g/cm3 C. .1 g/cm3 D. .10 g/cm3**24. Which of the following would classify as a qualitative**observation? A. The volume in the beaker is 15 mL. B. The mass of the paper clip is .500 g. C. The desk is 1.5 m long. D. The litmus paper turned red.**25. What is used to express the precision of an instrument?**A. zeros B. Significant figures C. decimals D. Lines over zeros**ANSWERS**1. C 10. C 19. C 2. A 11. B 20. C 3. B 12. A 21. D 4. D 13. C 22. B 5. A 14. B 23. D 6. D 15. C 24. D 7. B 16. C 25. B 8. B 17. D 9. A 18. A