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01. When an object’s distance from another object is changing, it is in ___.

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Presentation on theme: "01. When an object’s distance from another object is changing, it is in ___."— Presentation transcript:

1 01. When an object’s distance from another object is changing, it is in ___.

2 MOTION

3 02. As Earth orbits the sun, it is moving about ___ kilometers per ___.

4 30; SECOND

5 03. A place or object used for comparison to determine if something is in motion is called a(n) ___.

6 REFERENCE POINT

7 04. Liters, meters, and grams are all ___.

8 SI UNITS OF MEASUREMENT

9 05. The basic SI unit of length is the ___.

10 METER

11 06. The International System of Units is used ___ over the world.

12 ALL

13 07. If you know the distance an object has traveled in a certain amount of time, you can determine the ___ of the object.

14 SPEED

15 08. Speed equals distance divided by ___.

16 TIME

17 09. If the speed of an object does NOT change, the object is traveling at a(n) ___ speed.

18 CONSTANT

19 10. If a bicyclist travels 30 kilometers in two hours, her average speed is ___.

20 15 KMH

21 11. If an object moves in the same ___ and at a constant speed for 4 hours, the object’s velocity did not change.

22 DIRECTION

23 12. If you know a car traveled 300 kilometers in 3 hours, you can find its ___ speed.

24 AVERAGE

25 13. A train that travels 100 kilometers in 4 hours is traveling at what average speed?

26 25 KMH

27 14. When you know both the speed and the direction of an object’s motion, you know the ___ of the object.

28 VELOCITY

29 15. You can show the motion of an object on a line graph in which you plot distance against ___.

30 TIME

31 16. In graphing motion, the ___ of the slope depends on how quickly or slowly the object is moving.

32 STEEPNESS

33 17. On a graph showing distance versus time, a ___ line represents an object that is not moving at all.

34 HORIZONTAL

35 18. The upper layer of Earth consists of more than a dozen major pieces called ___.

36 PLATES

37 19. According to the theory of plate ___, Earth’s plates move ever so slowly.

38 TECTONICS

39 20. Scientists believe that Earth’s continents were connected as recently as ___ million years ago.

40 250

41 21. If one of Earth’s plates moves 5 centimeters every year, how many meters will it move in 500 years?

42 25 METERS

43 22. In a conversion factor, the denominator and numerator are ___.

44 EQUAL

45 23. It is rare for any motion to stay the ___ for very long.

46 SAME

47 24. The rate at which velocity changes is called ___.

48 ACCELERATION

49 25. Changing direction is an example of a kind of ___.

50 ACCELERATION

51 26. A car slowing down as it approaches a red light is an example of ___.

52 DECELERATION OR NEGATIVE ACCELERATION

53 27. The moon accelerates because it is continuously changing ___.

54 DIRECTION

55 28. To determine the acceleration rate of an object, you must calculate the change in velocity during each unit of ___.

56 TIME

57 29. If velocity is measured in kilometers per hour and time is measured in hours, the unit of acceleration is kilometers per ___.

58 HOUR PER HOUR

59 30. In an acceleration graph showing speed versus time, a ___ line shows the acceleration is constant.

60 STRAIGHT

61 31. A reference point is assumed to be ___, or not moving.

62 STATIONARY

63 32. A change in an object’s position relative to a reference point is called ___.

64 MOTION

65 33. When riding a bicycle past a building, you are not moving relative to the ___.

66 BICYCLE

67 34. Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the ___.

68 SOUTH

69 35. The distance traveled by a moving object per unit of time is called ___.

70 SPEED

71 36. The basic SI unit of length is ___.

72 METER

73 37. Speed that does not change is referred to as ___ speed.

74 CONSTANT

75 38. The statement that the motion of a hurricane is 20 kilometers per hour in an easterly direction is a description of the hurricane’s ___.

76 VELOCITY

77 39. A speed of 15 kilometers per hour is abbreviated as 15 ___.

78 KMH

79 40. If two lines appear on the same motion graph, the line with the steeper ___ indicates as greater speed.

80 SLOPE

81 41. According to the theory of plate ____, Earth’s plates move very slowly in various directions.

82 TECTONICS

83 42. The boundaries between the plates that make up the upper layer of the Earth are cracks in the Earths ___.

84 CRUST

85 43. Acceleration is the rate of change in ___.

86 VELOCITY

87 44. ___ occurs when an object slows down.

88 DECELERATION OR NEGATIVE ACCELERATION

89 45. A golf ball ___ when either its speed or its direction changes.

90 ACCELERATES

91 46. The motion of a car stopping at a traffic light is an example of ___ acceleration, also called deceleration.

92 NEGATIVE

93 47. The abbreviation of the unit of acceleration (meters/second/se cond) is___.

94 m/s/s or m/s 2

95 48. If a ship has an acceleration of 3 kilometers per hour per hour, its speed is expressed in the unit of ___.

96 km/h

97 49. If a car is speeding up, its initial speed is ___ than its final speed.

98 less

99 50. If a train is traveling north at 30 m/s brakes to a stop in 1 minute, its acceleration is ___ southward.

100 -0.5 m/s/s


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