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