Science 421 Class Test: Unit Analysis and Significant Figures in Measurement and Calculations
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1 Science 421 Class Test: Unit Analysis and Significant Figures in Measurement and Calculations 1) How many significant figures are in each of the following measurements? (1 point each) A) 593 cm B) L C) g D) kg E) 4017 km F) 270 m 6 3 G) dl H) 27 O m I) cm 2) Write the following measurements in scientific notation. (1 point each) A) m B) 1 5O OOO km C) g 2 D) cm E) m F) dl 3) Change the following values from scientific notation to standard decimal notation. (1 point each) A) L B) mg C) mm D) E) F) ) Make the following conversions. SHOW YOUR WORK! (2 points each) -3 A) 74 cm to meters B) kg to grams C) dal to millilitres D) years to seconds
2 E) hg to g F) 187 L to gallons (1 gal = L) G) 95.0 km/hr to m/s H) 12.5 bars to calories (450 cal = 1bar) 5) Express the following measurements to the correct number of significant figures. (Give measurement to the end of the rectangle, assume it begins at zero) (1 pt each) A) B) cm mm
3 11. A dragster is able to cover m in 0.75 hours. What is its speed in km/hr? (5 points) 12. The Lockheed SR71 jet is able to travel at 3520 km/hr. Based on this speed, how far could it travel in 5.3 hours? (5 points) 13. An Olympic sprinter can maintain an average a speed of 10.2 m/s. How long would it take him to finish a m race? (5 points) 14. Three Oaks is 75.0 km from the Charlottetown mall. a. Leaving TOSH at exactly 3:45 pm, how fast, in km/hr, would you have to drive to meet your friends at the mall by 4:35 pm? (Hint: First convert the time to hours!) (5 points) b. What is this speed in m/s? (2 points) c. If you drove like Dr. Pringle, at an average speed of 125 km/hr, what time would you arrive? Bonus Questions: Get each bonus question initialed once you complete it. A) Use the GLX explorer, and with a partner create a displacement-time graph which shows movement beginning with a stop, then approximately constant velocity of +2.0 m/s, and ends with a stop. B) Create a similar graph, but this time create a graph which has a slope of approximately -1.5
4 Science Answer Key Class Test: Unit Analysis and Significant Figures in Measurement and Calculations 1) How many significant figures are in each of the following measurements? (1 point each) A) 593 cm 3 B) L 2 C) g 4 D) kg 4 E) 4017 km 4 F) 270 m G) dl 4 H) 27 O m 3 I) cm 6 2) Write the following measurements in scientific notation. (1 point each) A) m B) 1 5O OOO km C) g x 10 m x 10 km 3.82 x 10 g 2 D) cm E) m F) dl x 10 cm x 10 m x 10 dl 3) Change the following values from scientific notation to standard decimal notation. (1 point each) A) L B) mg C) mm L mg mm D) E) F) ) Make the following conversions. SHOW YOUR WORK! (2 points each) -3 A) 74 cm to meters B) kg to grams 0.74 m 8.32 g C) dal to millilitres D) years to seconds 5.27 ml s, or s
5 E) hg to g F) 187 L to gallons (1 gal = L) g 49.4 gal G) 95.0 km/hr to m/s H) 12.5 bars to calories (450 cal = 1bar) 25.4 m/s 5625 cal, or 5630 cal 5) Express the following measurements to the correct number of significant figures. (Give measurement to the end of the rectangle, assume it begins at zero) (1 pt each) A) cm (the 5 is uncertain, and may vary) B) cm 72.8 mm (the 8 is uncertain, and may vary) mm
6 11. A dragster is able to cover m in 0.75 hours. What is its speed in km/hr? (5 points) 1220 km/hr, or 1200 km/hr 12. The Lockheed SR71 jet is able to travel at 3520 km/hr. Based on this speed, how far could it travel in 5.3 hours? (5 points) km, or km 13. An Olympic sprinter can maintain an average a speed of 10.2 m/s. How long would it take him to finish a m race? (5 points) 14. Three Oaks is 75.0 km from the Charlottetown mall. a. Leaving TOSH at exactly 3:45 pm, how fast, in km/hr, would you have to drive to meet your friends at the mall by 4:35 pm? (Hint: First convert the time to hours!) (5 points) b. What is this speed in m/s? (2 points) 90 km/hr 25 m/s c. If you drove like Dr. Pringle, at an average speed of 125 km/hr, what time would you arrive? 4:21 pm Bonus Questions: Get each bonus question initialed once you complete it. A) Use the GLX explorer, and with a partner create a displacement-time graph which shows movement beginning with a stop, then approximately constant velocity of +2.0 m/s, and ends with a stop. B) Create a similar graph, but this time create a graph which has a slope of approximately -1.5
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2 Motion BIGIDEA Write the Big Idea for this chapter. Use the What I Know column to list the things you know about the Big Idea. Then list the questions you have about the Big Idea in the What I Want to