Worksheets8th grade Unit 8.3 Quarterly Exam
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
Ava puts two magnetic toy trains very close to each other on a track. What will happen next and why?
4 lines
2.
Sound is produced by -----
a)
Heat energy
b)
Low temperatures
c)
Vibrations
d)
Friction
3.
Sound needs a medium.
a)
True
b)
False
4.
Sound waves travel the fastest through ---
a)
Liquids
b)
Gases
c)
Solids
5.
A sound wave cannot travel through which of the following?
a)
Metal
b)
Water
c)
Air
d)
Vacuum
6.
What do magnets stick to?
a)
copper
b)
wood
c)
iron
d)
plastic
7.
What would increase the strength of an electromagnet?
a)
Increasing the number of coils of wire
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
8.
This is a magnet made by an electric current
a)
emporary
b)
permanent
c)
electromagnet
d)
ferromagnet
9.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles.
d)
the middle.
10.
Are ALL metals magnetic?
a)
Yes
b)
No
c)
No one knows
d)
Sometimes
11.
It is possible for a magnet to have only one pole.
a)
Yes
b)
No
c)
Can't be determined
12.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
13.
These magnets will _______.
a)
move away from each other (repel)
b)
move toward each other (attract)
c)
don't move at all
14.
This is an example of.
a)
attraction
b)
repulsion
15.
This is an example of magnets...
a)
attracting to each other.
b)
repelling each other.
16.
What can you make visible by sprinkling iron filings around a magnet?
a)
the areas called domains
b)
the magnetic field lines
c)
the magnetic forces
d)
the north and south poles
17.
A magnet will attract scissors if the scissors contain:
a)
copper
b)
aluminum
c)
gold
d)
nickel
18.
Which one is NOT a good conductor?
a)
Copper
b)
Aluminium
c)
Iron
d)
Rubber
19.
When one bulb in a series circuit containing several light bulbs burn out:
a)
the other bulbs burn brighter.
b)
nothing changes in the rest of the circuit.
c)
none of the other bulbs will light up.
20.
Electric current is the flow of:
a)
electrons
b)
protons
c)
neutrons
d)
none of these
21.
When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.
a)
parallel
b)
series
c)
open
d)
closed
22.
Electrical energy is changed to ______________ in light bulbs.
a)
light energy
b)
chemical energy
c)
sound energy
d)
energy of motion
23.
The path that the electricity flows from the battery to the light bulb and back to the battery is called the _____.
a)
circuit
b)
components
c)
wires
d)
switch
24.
A conductor is?
a)
material that current can pass through easily
b)
material that current cannot pass through easily
c)
magnet
d)
electric current
25.
Insulator is?
a)
material that current can pass through easily
b)
material that current cannot pass through easily
c)
magnet
d)
static electricity
26.
this circuit is …..?
a)
open
b)
parallel
c)
closed
d)
none of the above
27.
What kind of circuit is this?
a)
series
b)
parallel
28.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
29.
What is one benefits of using a parallel circuit?
a)
t gets confusing.
b)
There are no problems.
c)
If one light goes out, it does not affect the others.
d)
If one light goes out, all the other lights go out too.
30.
A group of students built the circuit shown above. The light bulb does not glow. Which statement explains this observation?
a)
The bell uses most of the energy from the battery.
b)
The light bulb is not part of a complete circuit.
c)
The battery is not charged.
d)
The circuit does not have a switch.
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