Unit 7 Part 2

Kerry’s class has been experimenting with electricity. After completing several experiments, they created a table to record their findings.

Which statement is BEST supported by the class’ findings?

• Current electricity is stronger than static electricity.

• Static and current electricity need conductors to flow.

• Static electricity does not last for a long period of time.

• Current and static electricity are both created naturally.

Based on the flow of electrons, static electricity is similar to current electricity because:

• Both involve the movement of electrons.

• Both require a power source.

• Both are used to power light bulbs.

• Both are forms of magnetism.

Electrons in static electricity receive a charge without a power source by:

• rubbing two objects together.

• connecting to a battery.

• using a magnet.

• plugging into an outlet.

Why is the connecting wire not needed in static electricity?

• Because the charge is stationary.

• Because it uses a battery.

• Because it needs a circuit.

• Because it powers a light bulb.

What type of electricity is Harry producing when he rubs his feet across the carpet?

• Static electricity

• Current electricity

• Magnetic electricity

• Solar electricity

Why can't Harry use the electricity from rubbing his socks on the carpet to power a light bulb?

• Because static electricity is not continuous.

• Because it needs a larger battery.

• Because it requires a magnet.

• Because it needs solar panels.

Which fact about electricity will Julian MOST LIKELY share with the class when he presents his project?

• Static electricity shocks you, but current electricity does not.

• Current electricity requires wires, but static electricity does not.

• Current electricity is created in batteries, but static electricity is created in your hand.

• Static electricity travels quickly in the air, but current electricity travels slowly over wires.

Based on Jorge’s lists, which describes one way static and current electricity are different?

• Current electricity is more powerful.

• Static electricity is easier to demonstrate.

• Static electricity does not require metal conductors.

• Current electricity cannot be used to attract other materials.

When Walter removed his socks from the dryer, they were stuck together. When he pulled them apart, they made a crackling sound. Walter had learned that static electricity was responsible for the socks sticking together and the crackling sound when he pulled them apart.

Which statement BEST explains how static electricity that builds up in a dryer is different than current electricity?

• Static electricity that builds up in a dryer can be controlled, but current electricity cannot be controlled.

• They are not different because the static electricity that builds up in a dryer comes from the current electricity used to power the dryer.

• Static electricity is produced when objects rub together like clothes in a dryer, but current electricity requires a circuit to create electricity.

• The static electric charges in a dryer are able to constantly flow, but the charges created by current electricity do not constantly flow.

Which statement BEST explains how static and current electricity differ in their ability to produce light?

• Static electricity produces more light.

• Light from static electricity travels faster.

• Current electricity can produce light for a longer time.

• You cannot choose where light from current electricity appears.