Download Semester 2 Exam

Semester 2 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 following terms to complete the sentence.
a. conduction
b. convection
c. radiation
15. The energy from a hot object can be transferred by direct contact. This is an example of ____________.
16. Currents in the atmosphere carry warm, less dense air up and cool, more dense air down. This is an example
of _____________.
17. You and your friends are sitting near a fireplace. Heat reaches you through _____________.
Use the following to identify the temperature scale being used.
a. Fahrenheit
b. Celsius
c. Kelvin
18.
19.
20.
21.
Water boils at 100 degrees.
Water freezes at 32 degrees.
It is based on absolute zero.
Water boils at 212 degrees.
Use the diagram at the right to identify the parts of a wave.
22. crest
23. trough
24. amplitude
25. wavelength
26. one wave
27. Waves that need a medium to travel through are called
a. longitudinal
b. transverse
c. mechanical
28. A sound wave is an example of a
a. electromagnetic wave
b. transverse wave
c. longitudinal wave
d. surface wave
29. The number of waves passing a given point each second is
a. frequency b. wavelength
c. amplitude
d. speed
30. The Doppler effect of a passing siren results from an apparent change in
a. loudness
b. wave speed
c. frequency
d. interference
31. The combining of waves as they meet is known as
a. a crest
b. noise
c. interference
d. reflection
32. Waves bend as they pass through an opening. This is called
a. interference
b. diffraction
c. refraction
d. reflection
33. A sonar device can use echoes of ultrasound underwater to find the
a. speed of sound
b. depth of the water
c. temperature of the water
d. height of the waves of the surface
34. Which of the following is the most dangerous?
a. microwaves
b. alpha particles
c. beta particles
d. gamma rays
35. Which of the following is electronically neutral?
a. a proton
b. an electron
c. a hydrogen atom
d. a hydrogen ion
36. Christmas lights are an example of a
a. attracted circuit
b. series circuit
c. parallel circuit
d. repelled circuit
37-38. Is this a positive or negative charge?
a. positive
b. negative
a. positive
b. negative
39. Of the above two pictures, which charge is greater?
a. the positive
b. the negative
40. Conductors have ____________________ resistance to the flow of electrons.
a. high
b. low
41. This circuit is wired in
a. parallel
b. series
42. Which of the following can help prevent a circuit from overloading?
a. a bulb
b. extinguisher
c. a switch
d. circuit breaker
43. If you bring a north pole of a magnet close to a south pole of another magnet, they will
a. attract
b. repel
44. 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
45. 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
46. A pattern of stars as seen from Earth is called a
a. galaxy
b. nebula
c. cluster
d. constellation
47. The shape of the orbit of the Earth is
a. a circle
b. an ellipse c. an arc
d. a pulsar
48. The largest planet in our solar system is
a. Mars
b. Uranus
c. Saturn
d. Jupiter
49. During a solar eclipse,
a. the moon blocks out the sun
b. the sun stops emitting light
c. the Earth blocks the sun
d. none of these
50. Two tectonic plates moving apart are called
a. convergent
b. divergent
c. transform
d. subduction
51. 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
52. Rocks formed under heat and pressure are called
a. metamorphic
b. sedimentary
c. igneous
d. minerals
53. 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
54. ________________ rock is formed from cooled and hardened magma or lava.
a. schist
b. igneous
c. metamorphic
d, sedimentary
55. 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
56. 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
57. Cumulonimbus and nimbostratus clouds both
a. appear white and fluffy
b. produce precipitation
c. occur at high altitudes
d. look thin and wispy
58. Which is not a part of the water cycle?
a. evaporation
b. transpiration
c. precipitation
d. photosynthesis
59. Auroras are colorful displays of light in this layer of the atmosphere.
a. ionosphere
b. stratosphere
c. mesosphere
d. troposphere
60. Weather occurs in this layer of the atmosphere.
a. ionosphere
b. stratosphere
d. troposphere
c. mesosphere
Match the following weather instrument with what it measures.
61. thermometer
62. barometer
63. psychrometer
a. relative humidity
b. air pressure
c. temperature
64. 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
65. 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
66. Sound waves travel through the ear as ____________________.
a. pulses
b. light
c. vibrations
d. water
67. 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
68. 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°
69. The color that we see is the wavelength that is
a. reflected
b. absorbed
70. The lens that brings light waves together is called
a. converging
b. diverging
71. When a hair dryer is plugged into a 120 V outlet, it has a 6.0 A current in it. What is the hair dryer’s
power rating?
a. 20 W
b. 30 W
c. 720 W
d. 7200 W
72. The headlights of a car are powered by a 12 V battery. What is the resistance of the headlights if they
draw 4.0 A of current when turned on?
a. 4 Ω
b. 3 Ω
c. 48 Ω
d. 3.3 Ω
73. Current is the rate in which charges move through a(an)
a. conductor
b. insulator
c. voltage
d. joule
74. 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
75. As the frequency of waves increases, the wavelength _________________.
a. decreases
b. increases
YOU’RE FINISHED!
HAVE A GREAT SUMMER. 