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