Magnetism and Electricity (Grade 4)
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Magnetism and Electricity
Instructions: Circle the correct answer.
1.
Current is the flow of electric charge.
- True
- False
2.
The movement of electrons creates electricity.
- True
- False
3.
If you break a magnet into two pieces, what happens to its magnetic poles?
- There is no effect.
- Each magnet will have two south poles.
- Each magnet will have two north poles.
- Each magnet will have a north and south pole.
4.
If one bulb is removed from a series circuit, the other bulbs will
- dim.
- get brighter.
- flicker.
- go out.
5.
The area where electric force is felt is called the what?
- magnetic force
- magnetic field
- electric field
- electric force
6.
Which of the following can be used to make electricity?
- fossil fuels
- moving water
- solar energy
- all of the above
7.
A circuit is a closed circuit when
- there are no gaps in its path.
- it has two or more batteries.
- it contains a switch.
- there is a gap in its path.
8.
A buildup of electrical charge is called
- current electricity.
- negative charge.
- static electricity.
- positive charge.
9.
What are some examples of good conductors?
- wood, rubber, glass
- metal, salt, water
- grass, food, gas
- oxygen, carbon dioxide, hydrogen
10.
What supplies energy in an electric circuit?
- conductors
- electric cells
- resistors
- switches
11.
How many poles does a magnet have?
- none
- one
- two
- four
12.
A plastic ruler can get a positive charge by
- gaining a single negative charge.
- losing a single negative charge.
- gaining a single positive charge.
- losing a single positive charge.
13.
If an object has extra positive charges, it has a charge.
- large
- neutral
- negative
- positive
14.
Winding a wire in loops around an iron bar creates a(n) .
- fuse
- generator
- electromagnet
- insulator
15.
If the electric fields of two charged objects form a closed pattern of field lines, the objects are charged.
- negatively
- positively
- neutrally
- oppositely
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