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