19. Which of the following lists the three measurements in order from smallest to largest? 25. Why is it important that experiments be repeatable? A. 1 nm; 1 cm; 1 mm A. Repeating experiments over and over again makes it more likely that B. 1 cm; 1 nm; 1 mm controls will be used. C. 1 nm; 1 mm; 1 cm 3. Repeating experiments over and over again allows new controls to be used. C. Repeating experiments over and over again makes it more likely that the 20. Using the data in following table, the momentum of object B is results of an experiment will be supported by other scientists. Object Mass Velocity Momentum 10 kg 25 m/s 25 m/s 500 kg x m/s 26. What is required to cause the greatest increase in the acceleration of a moving object according to Newton's second law of motion? A. greater than that of object A. A. decreasing the velocity while increasing the amount of time the force is 3. less than that of object A applied C. the same as that of object A. B. increasing the friction on the object C. applying a net force in a shorter amount of time 21. Which of the following states that a moving object will move at a constant velocity unless an unbalanced force acts on it? 27. Which of the following relationships is valid? A. Newton's first law A. 100 C = 212 F = 373.15 K B. O'C is colder than 273 K B. Newton's second law C. 273 K is as cold as any temperature can be, therefore colder than either C. Newton's third law the 0'C or 32.F 22. Jane is on a merry-go-around that is moving at a constant speed. Her velocity 28. An explanation of things or events before observations and investigations are is also constant. performed is called scientific theory. A. True A. True B. False B. False 23. Setting up experiments with a control to test the effect of one thing on another 29. A car rounding a curve is subject to what kind of force? describes A. gravitational. A. making a pilot plant. B. inertial. B. an investigation. C. centripetal. C. building a model. 30. Absolute zero is the coldest possible temperature and is equal to 0 Kelvin. 24. Which of the following is TRUE about the relationship between science and A. True technology? B. False A. Science is the application of technology. B. Technology depends on science, but can lead to more science 31. What is the average speed, in meters per second, of a runner who has moved C. Science and technology always produce positive results for society. 5,000 meters in 1,200 seconds? Remember the equation: S = A. 4.2 m/s B. 420 m/s C. 0.42 m/s