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Chapter 13 Electricity And Magnetism
Test Description: Fourth Grade Science Subject!
Instructions: Answer all questions to get your test result.
1) What causes static electricity?
A
two positive charges
B
two negative charges
C
when positive and negative charges no longer balance
D
when positive and negative charges balance
2) A positively charged object repels___________.
A
both a positively and a negatively charged object
B
no charged object
C
a negatively charged object
D
a positively charged object
3) What are good conductors of electricity?
A
aluminum, silver and copper
B
marble and water
C
wood and plastic
D
material and thread
4) Where is a magnetic field the strongest?
A
in the middle
B
at both poles
C
it's equal at all sides
D
in the area away from the magnet
5) A material that conducts electric current poorly is called__________.
A
an insulator
B
a balloon
C
a bad object
D
skin
6) In a series circuit what would happen if one light bulb went out?
A
the others would stay on
B
the others bulbs would go out
C
every other one would go on
D
an electric flash
7) Why does a compass needle point in a north-south direction?
A
The needle reacts to Earth’s magnetic poles
B
It doesn't, it has an electrical component.
C
It has no other way to point.
D
The person points it that way.
8) What will more turns in the metal coil mean in an electromagnet?
A
The magnet will eventually not work.
B
The magnet will weaken.
C
The magnet will turn around.
D
The strength of the magnet will be increased.
9) Who shared the fact that changing magnetic field created an electric current in a wire?
A
William Gilbert
B
Joseph Henry
C
Hans Christian Oersted
D
Michael Faraday
10) What is produced when a coiled wire is spun around a magnet?
A
magical energy
B
biotanical energy
C
medical energy
D
electrical energy
11) What type of particles will gather near the bottom a cloud (if there is positive energy on land) before energy is released as lightning?
A
negative particles
B
positive particles
C
balanced particles
D
hard particles
12) A charge in motion is called a(n)_________.
A
non-particles
B
electric current
C
waves
D
fluent particles
13) The pushing or pulling force that exists when a magnetic material is near.
A
positive energy
B
neutrons
C
electrons
D
magnetism
14) What can handle appliances that use different amounts of electric current
A
series circuit
B
lit circuit
C
parallel circuit
D
neutral circuit
15) The quality of what opposes the flow of electric current through a material.
A
closed circuit
B
resistance
C
open circuit
D
attraction
16) One advantage of a(n) electromagnet has over a natural magnet is that…*
A
It slows down randomly.
B
It is that it is made by humans.
C
Its magnetic field can be turned off.
D
It sparks electricity.
17) Two natural ways that can power generators are________.
A
on and off switch
B
wind and moving water
C
mind power
D
bicycles and tredmills
*select an answer for all questions
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