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Observation, Inferences, and Measurement

T EST THE F IRST. Observation, Inferences, and Measurement. "Anyone can confirm how little the grading that results from examinations corresponds to the final useful work of people in life.“ Jean Piaget.

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Observation, Inferences, and Measurement

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  1. TEST THE FIRST Observation, Inferences, and Measurement "Anyone can confirm how little the grading that results from examinations corresponds to the final useful work of people in life.“ Jean Piaget "If more testing were the answer to the problems in our schools, testing would have solved them a long time ago.“ Bill Goodling, chair of House Education Committee "Testing improves education the same way that bombing promotes democracy“ Steve Cohn, Education professor at Tufts University Friday, October 3, 2008

  2. Name ________________________________________________ Date ______________ Period _______ TEST THE FIRST: OBSERVATION, INFERENCES AND MEASUREMENT Directions: This test is designed to let your teacher know how much information you have learned over the past few weeks, and to allow you to gauge this as well. Remember to think about your notes, and all the examples and demonstrations that we’ve done in class. Read each question carefully and completely before making your response, and make sure that whatever you write answers every part of the question. Do not leave any blank questions or naked numbers. Relax, good luck, and enjoy! 0. What is the best topping for ice cream? 1. In order to make an observation, an observer must use A. his or her senses. B. an experiment. C. calculations. D. a tool. _________ 2. A prediction of next winter’s weather in an example of a(n) A. classification B. inference C. observation D. measurement _________ 3. Which statement about a cumulous cloud seen over Syracuse, NY, is an inference? A. The cloud has an irregular shape B. The cloud appears white. C. The base of the cloud is 2 km above the ground C. The cloud formed over a lake. _________ 4. An interpretation based upon an observation is called a(n) A. inference. B. fact. C. classification. D. measurement. _________ 5. In the space below, make two observations and two inferences about your lovely teacher. Be nice. OBSERVATIONS INFERENCES 6. An object is shown to starboard. Find the density of the object using the information given. SHOW ALL WORK AND FORMULAE USED! 5 cm Mass = 500 g 5 cm 10 cm

  3. For questions 7, 8 and 9, use the set of graphs shown below 7. Which of the graphs has a slope of zero? A. 1 B. 2 C. 3 D. 4 _________ 8. What kind of relationship is shown in the graph labeled “1”? A. An indirect relationship. B. A diagonal relationship. C. A direct relationship. D. A logarithmic relationship. _________ 9. What is the DEPENDENT variable in the graphs above? 10. The density of mercury, a metal that is a liquid at room temperature, is 13.534 g/cm3. If the density of iron is 7.874 g/cm3, what would a pirate’s cannonball (made of iron) do if placed in a vat of mercury? You may write, draw or both. 11. Dr. Frederick VonMeeplesnort has a block of wood. If he cuts the wood into three pieces, what is true about the density of each piece? A. It will go down by one third. B. It will remain the same. C. The wood will sink in water. D. The wood will float like a balloon. _________ 12. A measurement is best defined as A. a direct comparison with a known standard. B. an inference made using the senses. C. a group of inferred properties. D. a guess based on a theory. _________ 13. A shiny and very mysterious grey cube is placed in a liquid. The cube sinks. Based on this information, compare the densities of the cube and the liquid. 14. What instrument could Jerry use to measure the temperature of his cat? A. A hydrometer. B. An anemometer. C. A thermometer. D. A catometer. _________

  4. 15. The cylinder to the right contains four different liquids whose densities are given. If a piece of quartz, which has a density of 2.7 g/cm3, is placed on the top of the column, where will it end up? 16. A student calculates the densities of five different pieces of aluminum, each with a different volume and mass. Assuming that each piece is still made out of aluminum, draw a line on the graph to the right to represent the relationship that would exist for the mass and volume of each piece. 17. As a parcel of air is heated, its volume will A. increase. B. decrease. C. stay the same. D. equal its density. _________ 18. A graduated cylinder is filled with 20 mL of water. A small plastic dinosaur (a stegosaurus, if you must know) was put in the cylinder, and the water level rose to 30 mL. If the mass of the plastic dinosaur is 20 g, what is its density? SHOW ALL WORK AND FORMULAE USED! 19. Baron McSneed has a rock. He knows that its density is 4 g/cm3, and that its mass is 12 g. What is its volume? SHOW ALL WORK AND FORMULAE USED! W D = 1.0 g/cm3 D = 1.8 g/cm3 D = 2.3 g/cm3 D = 3.0 g/cm3 X Y Z mass volume

  5. 20. A 1,000 g sample of a delicious chocolate cake has a density of 2 g/cm3. What would the density of a 2,000 g sample be? A. 2 g/cm3 B. 4 g/cm3C. 0.0002 g/cm3 D. 200 g/cm3 _________ 21. Water is kind of weird. As it is cooled from 50 degrees Celsius down to -10 degrees Celsius, its density will A. decrease, then increase once it is frozen. B. decrease, only. C. dncrease, then increase faster when it freezes. D. stay the same. _________ 22. What could you use to determine the length of a twig? A. Catometer B. Thermometer C. Meter stick D. Digital balance _________ 23. What would happen to the density of a gas as you increased the pressure on it? A. It would go up. B. It would stay the same; gasses can’t be compressed. C. It would decrease rapidly. D. It would change only a little bit. _________ 24. Why does ice float on water? 25. Which of the following statements is an inference? A. The rock is flat. B. The rock has a volume of 33 mL. C. The rock has been rounded by stream erosion. D. The rock is black and grey. _________ 26. At which point on the graph is the height of the airplane increasing the fastest? A. 1 B. 2 C. 3 D. 4 _________ 26. A cube and a sphere are both made out of gallium, a type of metal. What is true about the two objects? A. Their masses are the same. B. Their densities depend on which one is heaver. C. Their densities will be the same. D. Their volumes will be the same. _________ 27. Water is most dense at A. 4 degrees Celsius. B. 0 degrees Celsius C. 0 Kelvins D. In the solid phase. _________ 28. If jimmy has 1,000 g of candy, how many kilograms does he have? A. 1 kg B. .0001 kg C. 1.001 kg D. .01 kg _________ 3 4 2 Height (m) 1 Time (min)

  6. 29. Using the data below, construct an appropriate graph on the grid provided. Remember to properly label everything! A plant was measured every day for ten days. The height for each day is recorded below. Put appropriate scales on each axis, and make sure that all your data is plotted properly! Height of plant (cm) 2 3 5 7 14 17 21 25 29 30 Time (days) 1 2 3 4 5 6 7 8 9 10 30. Is the relationship shown on the graph a direct or indirect relationship? What is the slope of the line?

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