Grade 8 Unit 10 Electricity

Which of the following is the best example of an electrical conductor?

• tire

• steel

• plastic

• none of the above

Which best briefly summarizes the law of electric charges?

• charges always attract

• charges always repel

• unlike charges attract

• unlike charges repel

What kind of circuit is this?

• series

• parallel

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• neutral charged

• positively charged

• negatively charged

• no charges at all

A ______ opens and closes a circuit.

• cell

• conductor

• wire

• switch

What is this symbol for?

• light bulb

• wire

• cell

• battery

When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in parallel.

• true

• false

Electric current is the flow of _________.

• protons

• electrons

• neutrons

• none of them

Electric current is measured in....

• watts

• joules

• newtons

• amperes

When one light bulb burns out, the rest stay lit. The bulbs must be found in ....

• series circuit

• parallel circuit