Answer Key
Magnets and Motion
Name______________________!!
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Date_________________
Pretest ______
Posttest ______
Fill in the correct answer using a science vocabulary word from the box.
charge, static electricity, electric fields, electric current, circuit, electric cell,
conductor, insulator, resistor, series circuit, parallel circuit, magnet,
magnetic pole, magnetic fields, electromagnet
1. A pathway for current is called a ___circuit_______.
2. Magnetic Field andElectric Fields are similar because they are both areas where
forces can act without objects touching.
3. Current passes easily through a conductor but doesnʼt pass easily
through an_insulator.
4. A core wrapped in a wire that is carrying a current is called an_electromagnet_.
5. A measure of the extra charges that are on an object is called_charge_.
6. A material that resists the flow of current is called a _resistor_.
7. An_electric current__is a flow of charges.
8. In a _parallel circuit_, taking out one light does not turn off the whole circuit.
9. The charge tat stays on an object is called__static electricity___.
10.A_magnet__attracts objects made of iron or steel.
11.A_series circuit__has only one path for the current.
12.Energy to move current through a circuit is supplied by an_electric cell_.
13.A_magnetic pole_is where a magnetʼs pull is strongest.
Circle the letter of the best choice.
14. An object has a___D____charge if it has extra positive charges.
A.large! !
B.neutral! !
C.negative
D.positive
15. The ends of an electromagnet that are useful are called__
A.cores! !
B.loops! !
C.poles
D.wires
Answer Key
16. How many poles does a magnet have?
A.none! !
C.two
B.one! !
D.four
17. What supplies energy in an electric circuit?
A.conductors ! C.resistors
B.electric cells! D.switches
18. If the electric field of two charged objects form a closed patter of field lines, the
lines, the objects are____________charged.
A.negatively !
B.positively !
C.neutrally
D.oppositely
Complete the drawing of the bar magnet by labeling the poles and drawing the magnetic
lines of force around the magnet.