Flow of Electricity

What is a switch? 

• part of the toaster that you plug into the wall

• an outlet that gives power

• part of a circuit that starts or stops the electricity

All metals conduct electricity equally well. 

• True

• False

Sergio, Julian, and Damian are conducting an experiment in their science class. They are trying to understand what electricity is. Can you help them?

• The flow of tiny particles called electrons

• The flow of water through a hose

• The movement of atoms

• The generation of heat

Marissa, Jeremia, and Elissa are working on a science project. They need to create a model that demonstrates the flow of electricity. What would they need to create to demonstrate this?

• A closed path for the flow of electrons

• A device that generates electricity

• A wire that conducts electricity

• A switch that controls the flow of electricity

Why can birds safely sit on power lines?

• Their bodies do not complete a circuit

• They are immune to electricity

• Power lines have low voltage

• Power lines are insulated

Tags

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A fifth grade class constructed this circuit.  Which of these objects most likely made the light glow when connected to points X and Y?

• plastic straw

• cotton string

• aluminum foil

• rubber eraser

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A class prepared some electrical circuits using battery, connecting wires, and three light bulbs.  Which of these circuits can make the three bulbs light?

• A

• B

• C

• D

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Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries

• no, because the switch is open

• yes, because it is in a circuit

• no, because the bulb is burned out

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.

• The same current flows through all three light bulbs.

• It uses a single battery.

• The electrical current is divided between the three light bulbs.

What material would be safest to use as an insulator to cover electrical wires?

• rubber

• tin

• aluminum

• water