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Forces In Nature
Test Description: Forces of electricity, gravity, and magnetism
Instructions: Answer all questions to get your test result.
1) Magnetism is a
A
form of electricity
B
power
C
form of energy
D
force
2) What process is the method by which a neutral object obtains an electric charge?
A
discharge
B
radiation
C
convection
D
induction
3) Which is an example of gaining a static charge by conduction?
A
rubbing a balloon against your hair
B
bringing a charged rod near an electroscope
C
shuffling your shoes across a carpet
D
touching your car on a cold day and getting a shock
4) The Sun has more gravity than the other planets in our solar system because the Sun is
A
more massive
B
undergoing fusion
C
made of plasma
D
hotter
5) Andy hid a paper clip in one paper hat. He hid a crayon in another paper hat. Sam held a magnet near each paper hat. What happened?
A
The hat with the paper clip was pulled towards the magnet.
B
Both hats stayed in their starting positions and didn't move.
C
The hat with a crayon pushed away from the magnet.
D
The hat with a crayon was pulled towards the magnet.
6) Where should you expect the magnetic force of the bar magnet to be the strongest and pick up the most paper clips?
A
at the south pole
B
at both poles
C
in the center of the magnet
D
at the north pole
7) What set of objects could you use to demonstrate that an electric current will produce a magnetic field.
A
An iron nail, a permanent magnet and a battery.
B
A battery, an iron nail and a long copper wire.
C
A battery, a coil of wire and a compass.
D
A compass, some paper clips and a battery.
8) Hail stones do a lot of damage when they fall to the Earth and hit homes and cars with great force. They hit with great force because they
A
melt as they fall to Earth
B
are made of ice
C
have a huge mass compared to other falling objects
D
accelerate as they fall to Earth
9) In order to launch a rocket into space, the upward force of the rocket MUST overcome the force of _________, which is pulling it back to Earth.
A
magnetism
B
gravity
C
friction
D
air resistance
10) After turning off the television, you approach it. As you get close, but not touching it, the hairs on your arm start to stand up. This is an excellent example of static charge built up b
A
convection
B
friction
C
conduction
D
induction
11) What would increase the strength of an electromagnet?
A
Yes, but the new attractive force is due to gravity.
B
No, since they are not touching, no force is at work.
C
Yes, even though they are not touching, they are pulling on one another.
D
No, when the magnets are apart, they exert a repulsive force on one another.
12) two magnets will stick to one another when opposite poles align. When these magnets are pulled slightly apart, does the attractive force between them still exist?
A
use fewer coils of wire around a nail
B
use a smaller nail
C
use a battery with less voltage
D
use a battery with more voltage
*select an answer for all questions
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