Download SCIENCE: EIGHTH GRADE CRT FIRST QUARTER

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According to Newton’s first law of motion, what will
a moving object that is not acted on by an unbalanced
force do?
Which of Newton’s laws explain inertia?
What explains the tendency of all objects to resist any
change in motion?
What is a measure of inertia?
What causes a person to fall backward against her seat
when an airplane takes off?
When the brakes are suddenly applied to a moving
vehicle, what causes a person to continue to move
forward in his seat?
What does Newton's second law of motion state about
an object's acceleration?
According to Newton’s 2nd law, if there is an increase
in force, what will happen to the acceleration of the
object?
According to Newton’s third law of motion, when a
force is exerted on an object what does a second force
produce?
Which of Newton’s Laws is an example of sitting in a
chair?
Which of Newton’s Laws states that for every action
there is an equal and opposite reaction?
The law of conservation of momentum states that
when two objects collide, what happens to their
combined momentum?
If an astronaut uses a jet of nitrogen to maneuver in
space, what law is illustrated as the nitrogen is
expelled?
What type of activity best displays the use of
conservation of momentum?
What type of activity best demonstrates Newton’s
third law of motion?
Why can you run into a person and knock them over if
they are standing still?
If both a golf ball and a bowling ball are moving at the
same velocity, which ball has more momentum?
If the driver of a car suddenly makes a sharp turn, why
will the passenger slide to the side of the car?
If an astronaut throws a ball in space, when will the
ball stop?
Which of the following objects have the LEAST
inertia: a 5000 kg dump truck full of dirt, a 1000 kg
car, a 10 kg rock, or a 1 kg cat? The greatest?
A student kicks a 0.2 kg ball. She then kicks a 30 kg
rock with the same force. What can be said about the
acceleration of the ball as compared to the rock?
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22. A student is pushing her teacher in a chair down the
hall. What could she use to increase the acceleration
of the 100 kg teacher if given the following choices: a
100 kg bag of bricks, a 175 kg bag of bricks, a 200 kg
bag of bricks or use the help of another student?
23. What type of friction causes a sky diver’s acceleration
to change as he or she falls?
24.
What is needed to calculate an object’s acceleration?
25. What is determined if the distance a car travels is
divided by the time it took the car to travel that
distance?
26. What is the SI unit for speed?
27. What is being calculated if distance is divided by
time?
28. Be able to determine resultant velocity.
29. What factors cause a change in acceleration?
30. What is the motion of a catapult?
31. Due to projectile motion, where should Mr. Smith aim
when shooting at a target?
32. By what is the curved path traveled by a thrown
baseball known?
33. What is the force that opposes motion between two
surfaces that are touching?
34. Why does the deck around a pool become very
slippery to walk on when wet?
35. What type of friction opposes the motion of a car?
36. What type of friction is responsible for a car's tires
wearing away, making them very smooth, after
several thousand kilometers?
37. What type of friction occurs when brakes are applied
on a car or a bicycle?
38. What causes the napkins to stay on the picnic table
even though there is a slight breeze?
39. All objects accelerate toward the Earth at a rate of 9.8
m/s/s. What is the effect on velocity for every second
that an object falls downward?
40. What type of friction is air resistance also known as?
41. Given a leaping frog, a game of billiards, a race car, or
a bowling ball; which is as example of an object in
projectile motion?
42. What is the term for a slanted surface used to raise an
object?
43. What is the term for a bar that is free to pivot about a
fixed point?
44. What is the name given to an inclined plane wrapped
around a cylindrical post?
45. What type of simple machine is an inclined plane with
one or two sloping sides?
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46. Why is the work output for a machine always less
than the work input?
47. Determine which arrangement would have the greatest
mechanical advantage?
48. When a machine increases the size of the force
exerted, what happens to the distance through which
the force is exerted?
49. What type of simple machine is a jar lid?
50. How would you describe the input force and distance
of a screw?
51. What factor must change when a machine changes the
size of a force?
52. What does a single pulley change on an object?
53. What would happen if astronauts, who wear
pressurized suits in space, took their suits off?
54. Why do you not notice atmospheric pressure on your
body?
55. In what direction is fluid pressure always directed?
56. Why will a helium-filled balloon float in air?
57. What volume of fluid does an object displace?
58. Some people who keep parakeets as pets trim the
flight feathers. This makes it more difficult to fly
because the size of the wing has changed. What
would this do?
59. How do upside-down wings, or spoilers mounted on
the rear end of race cars, help to reduce the danger of
accidents?
60. Why can a submarine travel both on the surface of the
water and underwater?
61. Why do hydraulic devices use liquids instead of
gases?
62. Using the equation p = F/A, be able to determine
pressure, force or acceleration when given two of the
knowns.
63. What is the SI unit for pressure?
64. An empty aluminum soda can is heated for several
minutes with a high-wattage hair dryer, causing the
heated, "energized" particles of air inside the can to
escape through the opening. The can’s opening is
quickly sealed with strong tape. What will happen to
the can as it cools?
65. If a fluid flows from area A to area B, then what must
be the conditions of area B?
66. The reason you blow round bubbles and not square
ones is explained by what principle?
67. If given the following information, where would
atmospheric pressure be greatest? (below sea level,
at sea level, on a mountain top, at the altitude at which
planes fly)
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68. In what direction do gases exert pressure?
69. Suppose you are jumping on a trampoline. At the top
of your jump, what can be said about the amount of
your potential energy?
70. By increasing the speed of an object what happens to
its potential energy?
71. What is the SI unit for energy?
72.
The gasoline in a bus engine transfers into what type
of energy as the bus moves?
73. What type of energy is stored in a stretched rubber
band?
74. Before a music box will play music, the spring inside
must be wound. What type of energy is stored, giving
the music box the ability to play music?
75. A roller coaster travels up and down a large hill and a
small hill. At what point on the hills does a roller
coaster have the greatest kinetic energy?
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