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