Pre-AP Physics: Unit 1 Mock-The Scientific Method

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1 Name: Class: _ Date: _ Pre-AP Physics: Unit 1 Mock-The Scientific Method Multiple Choice Identify the choice that best completes the statement or answers the question. Each questions is worth 2.5 pts for a total of According to the scientific method, why does a physicist make observations and collect data? a. to decide which parts of a problem are important b. to ask a question c. to make an interpretation d. to solve all problems 2. According to the scientific method, how does a physicist formulate and objectively test hypotheses? a. by defending an opinion c. by experiments b. by interpreting graphs d. by stating conclusions 3. In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses? a. interpreting results b. stating conclusions c. conducting experiments d. making observations and collecting data 4. Diagrams are not designed to a. show relationships between concepts. c. measure an event or a situation. b. show setups of experiments. d. label parts of a model. 5. Why do physicists use models? a. to explain the complex features of simple phenomena b. to describe all aspects of a phenomenon c. to explain the basic features of complex phenomena d. to describe all of reality 6. Mesha is working on an experiment to determine what type of environment is best for a particular strain of bacteria. What should she do next in order to form a conclusion? a. She should change the bacteria s environment often in order to determine which one is best determine which is best b. She should try to grow the bacteria in each environment, then choose the one she likes the best c. She should change the bacteria in each environment often in order to d. She should note the differences between each environment, let the bacteria grow, and record her observations 7. A manufacturing plant begins producing a chemical that is nontoxic to adults. A nearby town then notices a rise in infant mortality rate. Why is it important to the citizens that the scientific community addresses the town? a. They can remove the chemical from the plant. b. They can make the plant stop producing the chemical c. They can prevent the citizens from suing the company. d. They can help determine if the chemical is linked to infant mortality. 1

2 Name: 8. A lack of precision in scientific measurements typically arises from a. limitations of the measuring instrument. b. human error. c. lack of calibration. d. too many significant figures. 9. How does a scientist reduce the frequency of human error and minimize a lack of accuracy? a. Take repeated measurements. b. Use the same method of measurement. c. Maintain instruments in good working order. d. all of the above 10. Three values were obtained for the mass of a metal bar: 8.83 g; 8.84 g; 8.82 g. The known mass is g. The values are a. accurate. c. both accurate and precise. b. precise. d. neither accurate nor precise. 11. The symbol mm represents a a. micrometer c. megameter b. millimeter d. manometer 12. Which of the following equations best describes the graph above? (ignore the numbers and look at the shape of the curve) a. y = x 2 c. y = 1/x 2 b. y = x d. y = 1/x 13. The SI base unit used to measure mass is the a. gram c. liter b. meter d. second 14. The SI base unit used to measure time is the a. 1 day c. 1 minute b. 1 hour d. 1 second 2

3 Name: 15. The most appropriate SI unit for measuring the length of an automobile is the a. micron c. meter b. kilometer d. nanometer 16. Estimate the order of magnitude of the length of a football field.. a m c m b m d m 17. A weather balloon records the temperature every hour. From the table above, the temperature a. increases. c. remains constant. b. decreases. d. decreases and then increases. 18. How do you write the number 50.0 in scientific notation with the correct number of significant figures? a X 10-1 c X 10 1 b. 5 X 10-1 d. 5 X How do you write the number 900,000 in scientific notation with the correct number of significant figures? a X 10-5 c X 10 5 b. 9 X 10-5 d. 9 X How do you write 3.00 X 10-2 in standard notation with the correct number of significant numbers? a c. 300 b d How do you write X 10 3 in standard notation with the correct number of significant numbers? a c b d How many significant figures are in ? a. 0 c. 6 b. 3 d Which of the following numbers has 2 significant figure? a. 20 c b. 20. d. answers a. and b. 24. Round the following number, , to three significant figures. a c b d Round the following number, 209,000, to three significant figures. a. 21 c. 210,000 b. 210 d. 210,000 3

4 Name: 26. What is the sum of 10.2 g g g? a g c g b g d. 20. g 27. What is the sum of 6 L L + 3? a g + 3 g c. 20 L + 3 b. 18 L d. 15 L What is the result of the following calculation: 10 m X 234 m? a m 2 c m 2 b m 2 d m What is the result of the following calculation: 25 g / 10 cm 3? a. 2 g/cm 3 c. 3 g/cm 3 b. 2.5 g/cm 3 d. 3.0 g/cm What is the result of the following calculation: ( 3.45 g X 89.0 g) / 2 g? a g c b. 50 g d. 50 4

5 Name: Problem Complete theses questions on a separate sheet of paper. These are worth 25 pts. 31. Convert 12.0 mm into pm 32. Convert 36 g/cm 3 into Kg/m A assembly line can produce 50packs of toilet paper every second. Each pack contains 16 rolls of toilet paper. Each roll of toilet paper requires 230. grams of wood pulp and the wood pulp is 19.0% by mass in grams. This is taken from a solution of wood pulp whose density is grams/ml. Find the volume, in kiloliters, of pulp solution need to keep the assembly line going for three day? 5

6 Pre-AP Physics: Unit 1 Mock-The Scientific Method Answer Section MULTIPLE CHOICE PROBLEM 1. ANS: B PTS: 1 DIF: I OBJ: ANS: C PTS: 1 DIF: I OBJ: ANS: A PTS: 1 DIF: I OBJ: ANS: C PTS: 1 DIF: I OBJ: ANS: C PTS: 1 DIF: I OBJ: ANS: D PTS: 1 7. ANS: D PTS: 1 8. ANS: A PTS: 1 DIF: I OBJ: ANS: D PTS: 1 DIF: I OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: I OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: I OBJ: ANS: D PTS: 1 DIF: I OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: C PTS: ANS: D PTS: ANS: B PTS: ANS: D PTS: ANS: B PTS: ANS: B PTS: ANS: D PTS: ANS: C PTS: ANS: C PTS: ANS: D PTS: ANS: C PTS: ANS: A PTS: ANS: D PTS: ANS: 12,000,000 pm PTS: 1 1

7 32. ANS: 36 Kg/L PTS: ANS: 2 PTS: 1 2