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Electricity&Magnetis
Ohio4thGrade
Question | Answer |
---|---|
Name some materials that conduct electricity. | iron nail, salt water, paper clip, brad fastener |
Name some materials that do not conduct electricity. | rubber band, toothpick, brick, plastic bag, drinking glass |
What do you call the points where electric current leaves and enters a battery? | Terminals |
When you rub two balloons over wool carpet do they attract or repel each other? | Repel |
A switch is turned off and opens a circuit. It is ______________________. | an incomplete circuit |
The south poles of two magnets are near each other. What do they do? | Repel |
What does a horseshoe magnet have? | It has a north and a south pole. |
Which of the following items: cardboard, plastic, aluminum foil, or rubber would you use to conduct electricity between a battery and a light bulb? | aluminum foil |
What material is most attracted to magnets? | iron |
True or False: A cat's fur sparking when you pet it is an example of static electricity. | True |
Lightning is an example of static electricity | True |
A light bulb going out when you switch it off is an example of static electricity. | False |
You notice insulation on a cord to a hair dryer is worn out and you can see the wire. What should you do? | Do not plug in the cord until it is fixed or buy a new hair dryer. |
What kind of circuit can electric current flow through? | closed circuit |
Which could be picked up with a magnet? eraser, rubber band, paper clip, glue stick, scotch tape, scissors, colored pencil, pencil sharpener | paper clip, scissors, pencil sharpener |
What keeps electricity from getting to you? | Insulator |
What is the path along which electricity travels? | electric circuit |
What is the path needed for a battery to light a bulb? | A wire tightly connected from the positive terminal of the battery to the side of a bulb and another wire tightly connected from the bottom of the bulb to the negative terminal of the battery |
What device is used to open and close a circuit easily without connecting and disconnecting wires? | switch |
What happens to two bar magnets when the south end of one is moved close to the north end of another? | They attract |
When you stroke a nail with a permanent magnet, what happens? | The nail is temporarily magnetized |
What happens when you pass a magnet quickly through a coil of wire many times? | Electricity is created and it is called a generator, because the device generates, or creates electricity. |
What material is on the outside of an electrical cord? Is it a conductor or insulator? | Rubber or plastic, insulator |
What material is in the inside of an electrical cord? Is it a conductor or insulator? | Copper, conductor |
When you have a coil of wire with electricity flowing through it and a magnet near it, what do you create? | A motor |
What is created when a wire is wrapped around an iron nail and has electricity flowing through it? | An electromagnet |
Explain how electricity and magnetism are closely related in a motor. | When electricity flows through a coil of wire near a magnet, the coil spins. |
Explain how electricity and magnetism are closely related in an electromagnet. | When a nail wrapped in a coil of wire has electricity flowing through it, the nail becomes a temporary magnet. |
What is necessary for a flashlight to light? | A complete circuit from the batteries to the bulb. |
Using pictures of wires, a switch, battery, and bulb, be able to draw a diagram to show how to make the light bulb shine. | Make sure the switch is closed, the wires are connected at both the positive and negative terminals, and the wires are connected at the side and bottom of the bulb. |
What could be some reasons a light bulb does not shine? | Loose wires, broken filament in light bulb, dead battery, open switch, insulation on wire not removed on end |