Science, Chapter 9: Electricity and
Magnetism (復興final) Name:
150620
True or False
1.
( ) Atoms are the smallest building blocks. There’re
not particles smaller than atoms.
2.
( ) Positive particles often move between
objects that are close together or touching.
3.
( ) The electric force gets stronger when the
charged objects are moving away from each other.
4.
( ) Lightning is the result of a fast, powerful
absorption of static electricity.
5.
( ) Graphite, or pencil lead, in pencils is a
good conductor.
6.
( ) If one loop in a parallel circuit is
broken, the current won’t flow in other loops any more.
7.
( ) Energy can transform, can be lost, and
can be made or destroyed.
8.
( ) In an incandescent light bulb, most of
the electricity passing through the filament is changed into light. An
incandescent light bulb is much more
efficient than a fluorescent light bulb.
9.
( ) The magnetic field extends out in all
directions from a magnet.
Match
|
a. compass
|
b. electromagnet
|
c. static electricity
|
|
d. friction
|
e. magnetism
|
f. resistor
|
|
g. electric current
|
h. charge balance
|
i. series circuit
|
1.
( ) A force that acts on moving electric
charges and magnetic material.
2.
( ) An electric charge in motion
3.
( ) It can transform energy into other forms of
energy.
4.
( ) A force that acts when two surfaces rub
together
5.
( ) An excess of positive or negative charge in
an object
6.
( ) Neutral
7.
( ) Electric charge can flow in only one circular
path and in only one direction.
8.
( ) a magnet that only works when
electricity is provided. g
9.
( ) a tool that can guide ships on ocean to
the right directions
Energy transformation
|
A.
sound energy
|
B.
electrical energy
|
C.
light energy
|
D.
wind energy
|
E.
energy of motion
|
When you play the violin, the (
) transforms to ( ).
A
lamp transforms ( ) to ( ).
A
wind turbine transforms ( ) to
( ).
Please
use complete sentences to answer or explain the following questions.
1.
What is the definition of “static”?
2.
Please name 3 common conductors
and 3 common insulators.
3.
Please give 2 examples of
energy sources and 2 examples of resistors.
4.
Please draw a picture to
simplify the circuit by using circuit symbols.
5.
When electrical current passes
through a resistor, it gives off heat. Certain appliances’ function rely on the
heat produced by resistors. These appliances often get hotter along with a red
glow. Please give 2 examples.
6.
What is the cause of the shape
of a magnetic field?
7.
In a magnetic field around a
magnet, at which part does the magnet produce strongest magnetic force?
8.
How can you increase the
strength of an electromagnet? (3 ways)
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