# Physical Science 1st Semester Mid Term Exam Study Guide 2014 Introduction / Motion & Force s Multiple Choice

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Physical Science 1st Semester Mid Term Exam Study Guide 2014 Introduction / Motion & Force s
Multiple Choice Identify the choice that best completes the statement or answers the question.
____ 1. What are 6 centimeters equal to?
 a. 600 meters b. of a millimeter c. 60 millimeters d. 600 millimeters

____ 2. How many meters are there in 1,865 cm?

 a. 0.1865 b. 1.865 c. 18.65 d. 186.5

____ 3. The best type of graph to use to show how some fixed quantity is broken down into parts is ____.

 a. bar graph b. line graph c. circle graph d. scatter graph

____ 4. When designing an experiment, the first step is to ____.

 a. analyze the data b. list a procedure c. state a hypothesis d. state the problem

____ 5. What is a scientific law?

 a. It is the same as a hypothesis. b. It is a description of a natural event. c. It is an explanation of a scientific observation. d. It is the conclusion of a scientific experiment.

____ 6. Scientific theories can be changed or replaced when

 a. new technology is invented. b. new discoveries are made. c. scientists decide to work on different problems. d. scientists make models of events or objects.

____ 7. The decimal equivalent of 10–2 is

 a. 100 b. 10 c. 0.1. d. 0.01.

____ 8. What is 78,900,000,000 expressed in scientific notation?

 a. 789 ´ 109 b. 7.89 ´ 109 c. 7.89 ´ 1010 d. 7.89 ´ 1011

____ 9. The speed of light is approximately 3 ´ 108 m/s. How would this be written in conventional notation?

 a. 300,000 m/s b. 3,000,000 m/s c. 30,000,000 m/s d. 300,000,000 m/s

____ 10. The difference between speed and velocity is that velocity includes

 a. direction. c. time. b. distance. d. weight.

____ 11. Friction is defined as

 a. force that opposes motion between two surfaces that are touching. b. rate at which velocity changes. c. resistance of an object to a change in its velocity. d. speed of an object in a particular direction.

____ 12. Weight is best described as

 a. an object’s resistance to acceleration. b. what causes an object to fall. c. the downward force exerted on objects due to gravity. d. a force solely dependent on an object’s mass.

____ 13. When objects are moved further apart from each other, the force of gravity

 a. increases. c. decreases. b. stays the same. d. decreases at first and then increases.

____ 14. The law that states that every object maintains constant velocity unless acted on by an unbalanced force is

 a. Newton’s first law of motion. c. Newton’s third law of motion. b. Newton’s second law of motion. d. the law of conservation of momentum.

____ 15. The law that states that for every action force there is an equal and opposite reaction force is

 a. Newton’s first law of motion. c. Newton’s third law of motion. b. Newton’s second law of motion. d. the law of conservation of momentum.

____ 16. The law that states that the unbalanced force acting on an object equals the object’s mass times its acceleration is

 a. Newton’s first law of motion. c. Newton’s third law of motion. b. Newton’s second law of motion. d. the law of conservation of momentum.

____ 17. Which of the following is true?

 a. Weight and mass are proportional but not equal. b. Weight is the gravitational force an object experiences due to its mass. c. The weight of an object on Earth is greater than the weight of the same object on the surface of the moon, but the object's mass stays the same. d. all of the above.

____ 18. A merry-go-round horse moves at a constant speed but at a changing ____.

 a. velocity b. balanced force c. inertia d. unbalanced force

____ 19. A horizontal line on a velocity/time graph shows ____ acceleration.

 a. positive b. negative c. changing d. zero

____ 20. Inertia varies depending on ____.

 a. force b. mass c. velocity d. motion

____ 21. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to rest against a tree. What is the magnitude of the ball’s displacement?

 a. 4 meters b. 9 meters c. 14 meters d. 45 meters

____ 22. The slope of a line on a distance-time graph is

 a. distance. b. time. c. speed. d. displacement.

____ 23. What is the speed of a bobsled whose distance-time graph indicates that it traveled 100 m in 25 s?

 a. 4 m/s b. 2500 m/s c. 0.25 mph d. 100 m/s

____ 24. Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s. What is your acceleration?

 a. 2 m/s2 b. 5 m/s2 c. 4 m/s2 d. 3 m/s2

____ 25. The slope of a speed-time graph indicates

 a. direction. b. acceleration. c. velocity. d. speed.

____ 26. When a pair of balanced forces acts on an object, the net force that results is

 a. greater in size than both forces combined. c. equal in size to one of the forces. b. greater in size than one of the forces. d. equal to zero.

____ 27. As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

 a. acts in the direction of motion. c. is usually greater than static friction. b. equals the weight of the box. d. acts in the direction opposite of motion.

____ 28. The forces acting on a falling leaf are

 a. air resistance and fluid friction. c. gravity and static friction. b. gravity and air resistance. d. weight and rolling friction.

____ 29. The property of matter that resists changes in motion is called

 a. friction. b. gravity. c. inertia. d. weight.

____ 30. An orange might roll off your cafeteria tray when you stop suddenly because of

 a. the balanced forces acting on the orange. c. the friction forces acting on the orange. b. the centripetal force acting on the orange. d. the orange’s inertia.

____ 31. If a force of 12 N is applied to an object with a mass of 2 kg, the object will accelerate at

 a. 0.17 m/s2. b. 24 m/s2. c. 6 m/s2. d. 12 m/s2.

____ 32. Your weight equals your

 a. mass. b. mass divided by the net force acting on you. c. mass times the acceleration due to gravity. d. mass times your speed.

____ 33. Newton’s third law of motion describes

 a. action and reaction forces. c. centripetal forces. b. balanced forces. d. net force.

____ 34. In which of the following are action and reaction forces involved?

 a. when a tennis racket strikes a tennis ball c. when rowing a boat b. when stepping from a curb d. all of the above

____ 35. What force is responsible for the repulsion between two positively-charged particles?

 a. centripetal b. electric c. gravitational d. nuclear

____ 36. When opposite poles of two magnets are brought together, the poles

 a. attract each other. c. cancel each other. b. repel each other. d. cause a net force of zero.

____ 37. Which universal force acts only on the protons and neutrons in a nucleus?

 a. electric b. gravitational c. magnetic d. strong nuclear

____ 38. With which of the following is the weak nuclear force associated?

 a. lightning b. nuclear decay c. ocean tides d. static cling

____ 39. Which of the following universal forces is the weakest?

 a. electric b. gravitational c. magnetic d. strong nuclear

____ 40. The gravitational force between two objects increases as mass

 a. decreases or distance decreases. c. increases or distance decreases. b. decreases or distance increases. d. increases or distance increases.

Completion Complete each statement.
41. An organized plan for gathering, organizing, and communicating information is called a(an) ________________.
42. A(An) ____________________ is a way of organizing data that is used to show changes that occur in related variables.
43. A(An) ____________________ is a statement that summarizes a pattern found in nature.
44. A(An) _________________________ explains a pattern found in nature.
45. A scientific ____________________ describes a natural event but does not explain why the event happens.
46. 375 cm equals ____________________ m.
47. According to Newton’s second law of motion, force is the product of ____________________ and ____________________.
48. Acceleration occurs when an object changes its ____________________ or ____________________ or both.
49. At the same speed, a bowling ball is harder to stop than a soccer ball because the bowling ball has greater ____________________.
50. A distance-time graph indicates an object moves 20 km in 4 h. The average speed of the object is ____________________ km/h.
51. Freely falling objects accelerate at 9.8 m/s2 because the force of ____________________ acts on them.
52. Accelerated motion is represented by a(an) ____________________ line on a distance-time graph.
53. The force that opposes the motion of objects that touch as they move past each other is called ____________________.
54. It usually takes more force to start an object sliding than it does to keep an object sliding because static friction is usually ____________________ than sliding friction.
55. The two forces acting on a falling object are gravity and ____________________.
56. When a falling object reaches terminal velocity, the net force acting on it is ____________________.
57. The tendency of an object to resist any change in its motion is called ____________________.
58. During a head-on auto collision, ____________________ causes a passenger in the front seat to continue moving ____________________.
59. The force of gravity acting on an object is the object’s ____________________.
60. Define acceleration.
61. State Newton's first law.
62. State Newton's second law.
63. What is the difference between mass and weight? 