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32. A hypothesis concerned with a specific phenomenon is found to 42. A movie projector makes a 1 m by 1 m image when projecting
be acceptable through many experiments over a long period of 1 m from a screen, a 2 m by 2 m image when projecting 2 m
time. This hypothesis usually becomes known as a from the screen, and a 3 m by 3 m image when projecting 3 m
a. scientific law. from the screen. What is the proportional relationship between
b. scientific principle. the distance from the screen and the area of the image?
c. theory. a. direct
d. model. b. inverse
33. A scientific law can be expressed as c. square
a. a written concept. d. inverse square
b. an equation. 43. A movie projector makes a 1 m by 1 m image when projecting
c. a graph. 1 m from a screen, a 2 m by 2 m image when projecting 2 m
d. all of the above. from the screen, and a 3 m by 3 m image when projecting 3 m
34. The symbol ∝ has a meaning of from the screen. What is the proportional relationship between
a. “almost infinity.” the distance from the screen and the intensity of the light falling
b. “the change in.” on the screen?
c. “is proportional to.” a. direct
d. “therefore.” b. inverse
c. square
35. Which of the following symbols represents a measured property
d. inverse square
of the compactness of matter?
a. m 44. According to the scientific method, what needs to be done to
b. ρ move beyond conjecture or simple hypotheses in a person’s
c. V understanding of his or her physical surroundings?
d. Δ a. Make an educated guess.
b. Conduct a controlled experiment.
36. A candle with a certain weight melts in an oven, and the
c. Find an understood model with answers.
resulting weight of the wax is
d. Search for answers on the Internet.
a. less.
b. the same. Answers
c. greater. 1. c 2. b 3. b 4. c 5. a 6. a 7. b 8. a 9. d 10. b 11. c 12. d 13. a 14. c
d. The answer varies. 15. c 16. b 17. d 18. c 19. d 20. c 21. c 22. c 23. b 24. a 25. c 26. b
37. An ice cube with a certain volume melts, and the resulting 27. b 28. a 29. b 30. b 31. b 32. a 33. d 34. c 35. b 36. b 37. a 38. a
volume of water is 39. b 40. a 41. b 42. c 43. d 44. b
a. less.
b. the same.
c. greater. QUESTIONS FOR THOUGHT
d. The answer varies.
38. Compare the density of ice to the density of water. The density of 1. What is a concept?
ice is 2. What are two components of a measurement statement? What
a. less. does each component tell you?
b. the same.
3. Other than familiarity, what are the advantages of the English
c. greater.
system of measurement?
d. The answer varies.
4. Define the metric standard units for length, mass, and time.
39. A beverage glass is filled to the brim with ice-cold water (0°C)
5. Does the density of a liquid change with the shape of a container?
and ice cubes. Some of the ice cubes are floating above the water
Explain.
level. When the ice melts, the water in the glass will
a. spill over the brim. 6. Does a flattened pancake of clay have the same density as the
b. stay at the same level. same clay rolled into a ball? Explain.
c. be less full than before the ice melted. 7. What is an equation? How are equations used in the physical
40. What is the proportional relationship between the volume of sciences?
juice in a cup and the time the juice dispenser has been 8. Compare and contrast a scientific principle and a scientific law.
running? 9. What is a model? How are models used?
a. direct 10. Are all theories always completely accepted or completely
b. inverse rejected? Explain.
c. square
d. inverse square
41. What is the proportional relationship between the number of cookies
in the cookie jar and the time you have been eating the cookies?
a. direct
b. inverse
c. square
d. inverse square

1-23 CHAPTER 1 What Is Science? 23