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Science A Review
Test Description: Energy and Motion
Instructions: Answer all questions to get your test result.
1) To recharge your cell phone you plug in into an electrical outlet for several hours. The electrical energy is stored as ___________ energy until you are ready to use the phone.
A
thermal
B
radiant
C
chemical
D
nuclear
2) Convection is heat transfer by:
A
movement in a fluid
B
direct contact of molecules
C
movement of waves through space
D
chemical reactions
3) Which type of matter does sound travel though the slowest?
A
solid
B
liquid
C
plasma
D
gas
4) Which way does a swimmer push to move forward in the water?
A
to the right
B
to the left
C
forward
D
backward
5) If two opposite forces act on a stationary object at the same time, and one is stronger than the other, which way will the object move?
A
it will not move
B
it will move toward the weaker force
C
it will move toward the stonger force
D
it will move at right angles to the two forces
6) The speed and direction of an object's motion is its:
A
acceleration
B
inertia
C
momentum
D
velocity
7) Which of the following correctly applies the concept of power?
A
power is defined as how much energy something has
B
moving a box up a ramp requires just as much power when it is moved slowly as when it is moved fast.
C
All things being equal, a brighter light bulb uses more power than dimmer light bulb
D
The car that uses energy more effeciently uses less power
8) Define Power.
A
Power is the total amount of energy used by an object.
B
Power is the rate at which energy is converted from on form to another.
C
Power is the amount of energy contained in an object.
D
Power is how fast an object can move/
9) What is the difference between energy and power?
A
Energy is how fast an object moves while power is the weight of the object multiplied by its speed.
B
Energy is the amount of work an object can do while power is the amount of work done on the object.
C
Energy is how long a motion lasts while power is how much total motion there is.
D
Energy is the amount of work done on an object while power is the rate at which the work is done.
10) Heat is conducted when:
A
molecules stop moving
B
molecules transfer their energy to neighboring molecules
C
molecules break apart
D
molecules escape into space
*select an answer for all questions
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