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**A. Lab A’s reading is more accurate than lab B’s. **

Standardized Test Practice 1. Two laboratories use radiocarbon dating to measure the age of two wooden spear handles found in the same grave. Lab A finds an age of 2250 40 years for the first object; lab B finds an age of 2215 50 years for the second object. Which of the following is true? A. Lab A’s reading is more accurate than lab B’s. B. Lab A’s reading is less accurate than lab B’s. C. Lab A’s reading is more precise than lab B’s. D. Lab A’s reading is less precise than lab B’s. STP 1

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**2. Which of the following is equal to 86.2 cm?**

Standardized Test Practice 2. Which of the following is equal to 86.2 cm? A m B mm C. 8.62×10-4 km D. 862 dm STP 2

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**A. Multiply the km by the m/s, then multiply by 1000. **

Standardized Test Practice 3. Jario has a homework problem to do involving time, distance, and velocity, but he has forgotten the formula. The question asks him for a measurement in seconds, and the numbers that are given have units of m/s and km. What could Jario do to get the answer in seconds? A. Multiply the km by the m/s, then multiply by 1000. B. Divide the km by the m/s, then multiply by 1000. C. Divide the km by the m/s, then divide by 1000. D. Multiply the km by the m/s, then divide by 1000. STP 3

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**4. What is the slope of the graph?**

Standardized Test Practice 4. What is the slope of the graph? A m/s2 B. 0.4 m/s2 C. 2.5 m/s2 D. 4.0 m/s2 STP 4

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**5. Which formula is equivalent to**

Standardized Test Practice 5. Which formula is equivalent to A. B. C. D. STP 5

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**a. Rewrite the equation F = ma so a is in terms of m and F. **

Standardized Test Practice 6. You want to calculate an acceleration in units of m/s2, given a force in N, and the mass in g, on which the force acts. (1 N = 1 kg·m/s2) a. Rewrite the equation F = ma so a is in terms of m and F. b. What conversion factor will you need to multiply by to convert grams to kilograms? c. A force of 2.7 N acts on a 350-g mass. Write the equation you will use, including the conversion factor, to find the acceleration. STP 6

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**Standardized Test Practice**

Answer: a. b. c. STP 6

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**7. Find an equation for a line of best fit for the data shown.**

Standardized Test Practice 7. Find an equation for a line of best fit for the data shown. Answer: STP 7

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**Test-Taking Tip Skip Around if You Can**

Standardized Test Practice Test-Taking Tip Skip Around if You Can You may want to skip over difficult questions and come back to them later, after you’ve answered the easier questions. This will guarantee more points toward your final score. In fact, other questions may help you answer the ones you skipped. Just be sure you fill in the correct ovals on your answer sheet. STP 8

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