2013/14 Semester 1 Exam – Do not write on here
1. ______is defined as a force acting over a distance.
a. power b. energy c. work d. potential energy
2. Calculate the kinetic energy of a 5 kg ball rolling at a constant speed of 9 m/s.
a. 202.5 J b. 45 J c. 22.5 J d. 1.8 J
3. ______is determined using both mass and velocity.
a. work b. power c. potential energy d. kinetic energy
4. The Law of Conservation of Energy states that
a. the energy of a system is always decreasing
b. no machine is 100% efficient
c. energy is neither lost nor created
d. Earth has unlimited resources
For each example, select A. potential energy or B. kinetic energy
5. a stone in a stretched slingshot
6. a speeding race car
7. a water molecule in a boiling pot of water
8. the water held above a dam
9. a wound clock spring
10. The unit that measures energy is called a
a. ohm b. joule c. Newton d. kilogram
11. The unit that measures power is the
a. watt b. joule c. Newton d. kilogram
12. A child pulls a sled up a snow covered hill. The child uses 61 N of force to pull the sled.. If she walks a distance of 10 m, how much work has she done?
a. 610 J b. 6.1 J c. 61 J d. 71 J
13. Inertia has to do with Newton’s ______Law.
a. first b. second c. third
14. F = ma is Newton’s ______law.
a. first b. second c. third
Use the diagram at the right to identify the parts of a wave.
15. crest
16. trough
17. amplitude
18. wavelength
19. one wave
20. Waves that need a medium to travel through are called
a. longitudinal b. transverse c. mechanical
21. A sound wave is an example of a
a. electromagnetic wave
b. transverse wave
c. longitudinal wave
d. surface wave
22. The number of waves passing a given point each second is
a. frequency b. wavelength c. amplitude d. speed
23. The Doppler effect of a passing siren results from an apparent change in
a. loudness b. wave speed c. frequency d. interference
24. The combining of waves as they meet is known as
a. a crest b. noise c. interference d. reflection
25. Waves bend as they pass through an opening. This is called
a. interference b. diffraction c. refraction d. reflection
26. The basic types of galaxies are
a. spiral, elliptical, and irregular
b. barred, elliptical, and open
c. spiral, quasar, and pulsar
d. open, binary, and globular
27. Which of the following is the possible age of the universe?
a. 4.6 million years b. 15 million years c. 4.6 billion years d. 15 billion years
28. A pattern of stars as seen from Earth is called a
a. galaxy b. nebula c. cluster d. constellation
29. The shape of the orbit of the Earth is
a. a circle b. an ellipse c. an arc d. a pulsar
30. The largest planet in our solar system is
a. Mars b. Uranus c. Saturn d. Jupiter
31. When the light of the moon is INCREASING (light is on the right), it is said to be
a. waxing b. waning
32. If more than half of the moon is lit up, we call it a ______moon.
a. new b. full c. gibbous d. crescent
33. A star undergoes its certain life cycle based on its
a. size b. color c. distance from Earth d. distance from the sun
34. Convert 20 meters to decimeters.
a. 2 dm b. 200 dm c. 2000 dm d. 0.02 dm
35. Convert 100 meters to kilometers.
a. 100,000 km b. 10 km c. 0.1 km d. 1 km
36. Convert 27 grams to centigrams.
a. 2700 cg b. 270 cg c. 0.27 cg d. 2.7 cg
37. What is 78,900,000,000 expressed in scientific notation?
a. 789 x 109 b. 78.9 x 108 c. 7.89 x 1010 d. 7 x 1010
38. How would you express 5.3 x 10-4 as a regular number?
a. 0.000053 b. 0.00053 c. 0.005 d. 53,000
39. A turtle swims at 0.50 m/s. After 4 s, it’s swimming at 0.80 m/s. What is the turtle’s average speed?
a. 0.075 m/s/s b. 0.2 m/s/s c. 0.125 m/s/s d. 13.3 m/s/s
40. It takes 100,000 J of work to lift an elevator 18 m. If this is done in 20 sec, what is the power
of the elevator during this process?
a. 5555.6 W b. 5000 W c. 360 W d. 50,000 W
41. Calculate the speed of a car that went 225 miles in 3 hours.
a. 65 mph b. 55 mph c. 45 mph d. 75 mph
42. Calculate the momentum of a 0.15 kg ball that is moving toward home plate at a velocity of 40m/s.
a. 6 kg*m/s b. 267 kg*m/s c. 0.00375 kg*m/s d. 40 kg*m/s
For 43-45 use the picture of the graph at right.
43. Which day had the lowest temperature?
a. Sun b. Wed
c. Sat d. Thurs
44. Which two days had very similar temperatures?
a. Mon & Fri b. Wed & Fri
c. Sun & Thurs d. Mon & Thurs
45. About how many degrees warmer was it on Wed than on Sat?
a. 10 b. 15 c. 5 d. 0
46. When drawing a graph that measures family average income over a period of 50 years,
the independent variable is:
a. Income b. Average c. Years d. It is impossible to say
47. Accuracy is defined as:
a. A measure of how often an experimental value can be repeated.
b. The closeness of a measured value to the real value.
c. The number of significant figures used in a measurement.
d. None of these
48. What should never be included in a well written lab report conclusion?
a. “I” b “You” c. Opinions d. All of these
Use the chart to the right for 49-51.
49. Which conclusion is best supported by these data?
a. Earth’s surface is composed mostly of silicon and calcium.
b. Oxygen is closer to Earth’s surface than aluminum.
c. There is more aluminum than calcium at Earth’s surface.
d. Silicon is much heavier than iron at Earth’s surface.
50. Which element makes up 1/20 of the Earth’s surface?
a. Oxygen b. Iron c. Silicon d. Calcium
51. About how many times more abundant is oxygen than iron?
a. 2 b. 5 c. 50 d. 9
52. Two tectonic plates moving apart are called
a. convergent b. divergent c. transform d. subduction
53. Explosions of magma out of a vent in the Earth’s crust is called a(n)
a. epicenter b. earthquake c. volcano d. fault line
54. Rocks formed under heat and pressure are called
a. metamorphic b. sedimentary c. igneous d. minerals
55. The sequence of events where one rock form changes into another and back again is described by
a. the rock family b. the rock cycle c. metamorphism d. deposition
56. ______rock is formed from cooled and hardened magma or lava.
a. schist b. igneous c. metamorphic d, sedimentary
57. The point where water condenses out of the air is called the
a. dew point b. freezing point c. 80 degrees F d, absolute zero
58. CFC’s, chemicals used in refrigerants and propellants in spray cans, are partly to blame for the reduction of ______in the atmosphere.
a. carbon dioxide b. oxygen c. ozone d. methane
59. Cumulonimbus and nimbostratus clouds both
a. appear white and fluffy
b. produce precipitation
c. occur at high altitudes
d. look thin and wispy
60. Which is not a part of the water cycle?
a. evaporation b. transpiration c. precipitation d. photosynthesis
61. Auroras are colorful displays of light in this layer of the atmosphere.
a. ionosphere b. stratosphere c. mesosphere d. troposphere
62. Weather occurs in this layer of the atmosphere.
a. ionosphere b. stratosphere c. mesosphere d. troposphere
Match the following weather instrument with what it measures.
63. thermometer a. relative humidity
64. barometer b. air pressure
65. psychrometer c. temperature
66. Using Newton’s second law, how much force is required to roll a ball down a hill with an acceleration of
9.8 m/s2 if the mass of the ball is 0.15 kg?
a. 65 N b. 1.47 N c. 9.65 N d. 14.4 N
67. It takes 30 J of work to move a large box in 5 min. How much power is needed to move the box?
a. 6 W b. 150 W c. 25 W d. 0.17 W
68. Sound waves travel through the ear as ______.
a. pulses b. light c. vibrations d. water
69. What is the function of the pupil in your eye?
a. To give your eye color
b. To make tears
c. To refract light
d. To regulate the amount of light going into the eye
70. If a light ray comes in at 45° to the normal, what is the angle of reflection?
a. 90° b. 30° c. 45° d. 60°
71. The color that we see is the wavelength that is
a. reflected b. absorbed
72. The lens that brings light waves together is called
a. converging b. diverging
73. The speed of sound depends on
a. the temperature of the medium
b. the density of the medium
c. how well the particles of the medium transfer energy
d. all of the above
74. As the frequency of waves increases, the wavelength ______.
a. decreases b. increases
75. The idea that a moving sound changes frequency as it gets nearer to you is called
a. intensity b. the Doppler Effect c. hertz d. loudness
ANSWERS
1. c
2. a
3. d
4. c
5. a
6. b
7. b
8. a
9. a
10. b
11. a
12. a
13. a
14. b
15. a
16. b
17. c
18. b
19. a
20. c
21. a
22. a
23. d
24. b
25. e
26. c
27. c
28. c
29. a
30. c
31. c
32. b
33. b
34. d
35. c
36. b
37. a
38. b
39. b
40. b
41. a
42. d
43. a
44. a
45. d
46. d
47. b
48. d
49. a
50. b
51. c
52. a
53. b
54. b
55. a
56. c
57. b
58. d
59. a
60. d
61. c
62. b
63. a
64. b
65. a
66. c
67. d
68. c
69. a
70. a
71. c
72. b
73. a
74. d
75. a