# electricity

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Electrical &   Electrical &     Scientific    Skill Application
Magnetic       Magnetic       Concepts &        & Critical
Words         Words 2      Understanding       Thinking

5              5               5                5
10              10              10               10
15              15              15               15
20              20              20               20
25              25              25               25
30              30              30               30
35              35              35               35
40
resistor

Material that resists but doesn’t stop
the flow of electric current

Row 1, Col 1
circuit

Path made for an electric current

1,2
(B) negative

An object has a _____ charge if it has more
negative particles than positive particles.

(A) positive
(B) negative
(C) neutral
(D) large

1,3
(H) series
The circuit in the illustration is a _____ circuit.

(F) parallel          (H) series
(G) resistor          (J) switching
+ / -

A          B        C

1,4
electric current

Flow of electric charges

2,1
conductor

Material that electric current can
pass through easily

2,2
(H) repel each other

When two objects both have positive
charges, the objects–

(F) attract each other
(G) exchange negative particles
(H) repel each other
(J) neutralize each other

2,3
(A) none of the bulbs will light
If Bulb B burns out, then –

(A) none of the bulbs will light
(B) only Bulb A will light
(C) Bulbs A and C will light
(D) only Bulb C will light
+ / -

A              B           C

2,4
magnetic field

Space around a magnet where the
force of the magnet acts

3,1
electromagnet

Arrangement of wire wrapped around a core

3,2
(C) conducts

Copper wire in a circuit _____ electricity.

(A) resists
(B) insulates
(C) conducts
(D) energizes

3,3
The Earth is like a giant magnet, and the compass has
a magnet in its needle. The north-seeking pole of the
compass magnet is attracted to the Earth’s North
Pole. This makes the compass needle point north.

What two magnets make a compass work?
How do they interact?
(2 questions)

3,4
electric cell

Supplies energy to move charges
through a circuit

4,1
insulator

Material that electric current cannot
easily pass through

4,2
(H) at both poles

A bar magnet’s pull is strongest–

(F) at the S pole
(G) at the N pole
(H) at both poles
(J) in the middle

4,3
Possible Answer: They both produce a force that can pull or
push things without touching them. They both have opposite
states: electricity has positive and negative, and magnetism has
north-seeking and south-seeking. In both, opposite states attract
and same states repel.

In what ways are electricity and magnetism

4,4
charge

Measurement of an object’s extra
positive or negative particles

5,1
series circuit

Circuit with one path for electric current

5,2
(D) opposite poles

Magnets attract each other at –

(A) their middles
(B) only the N poles
(C) only the S poles
(D) opposite poles

5,3
The “N” pole; the magnetic field lines in the iron
fillings show that the magnets repel each other.

Which pole of Magnet B can you infer
is next to Magnet A—the N pole or the
S pole? Why? (2 Questions)

S       N

Magnet A         Magnet B

5,4
magnet

of iron or steel

6,1
static electricity

Charge that stays on an object

6,2
(F) motion

Electromagnets in motors are used to cause—

(F) motion
(G) light
(H) circuits
(J) heat

6,3
Picture A; the bulb will help indicate a change in the
circuit. Picture B won’t work because of the empty
socket.

Which of the two pictures shows a better
plan for investigating whether or not a
(2 questions)
+ / -

+ / -
Picture A
Picture B

6,4
electric field

Space around an object where
electric forces occur

7,1
parallel circuit

Circuit with more than one path
for electric current

7,2
(C) heat or cool it

Which of the following is NOT a good
way to control an electromagnet?

(A) turn the current on and off
(B) add coils of wire around the core
(C) heat or cool it
(D) decrease the amount of current

7,3
The compass needle will turn because an
electromagnet produces a magnetic field. The
magnetized compass needle will move to line up with
the field lines.

Predict what will happen if you put a
compass next to an electromagnet that
is switched on.

7,4
magnetic poles

Ends of a magnet

8,1

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 views: 11 posted: 7/6/2012 language: English pages: 31