Circuits and Current Electricity Assessment

A student tests an unknown substance that she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal?

• It is a good conductor of electricity.

• It can break easily and is very brittle.

• It can easily float in water.

• It is brown and dull.

The light bulb in Lilly's circuit does not light up. Which describes the reason?

• A switch is needed to allow energy to flow through the circuit.

• The circuit is missing a power source to provide energy to the battery.

• A second wire needs to connect the other side of the battery to the light bulb.

• The wire needs to run from the positive end of the battery instead of the negative end.

Tags

NGSS.4-PS3-2

The light bulb in Brody's circuit does not light up. What can Brody do to make the light bulb light up?

• Brody can add a control switch to the circuit.

• Brody can connect one wire to the light bulb.

• Brody can remove the battery from the circuit.

• Brody can connect both wires to the light bulb.

Tags

NGSS.4-PS3-2

Ryan wants to build a complete circuit that includes a battery and a light bulb. What else will Ryan need in the circuit to light up the light bulb using the battery? Select ALL that apply.

• a wire that connects the negative end of the battery to the light bulb

• a wire that connects the positive end of the battery to the light bulb

• a power source to provide a current to the battery

• a switch to turn the current on and off

• an insulator to allow current to flow from the battery

An electrician is someone who installs and fixes electrical wiring and equipment. Tom has worked as an electrician for ten years. His favorite part of the job is installing the wiring in brand new homes. Tom has many tools that he uses to help set up the homes to use electricity.

How would Tom most likely use an insulator?

• He would use copper wires so that the electricity would easily flow.

• He would use wires made of plastic so that the electricity would easily flow.

• He would use plastic-coated wires so that he would not get an electrical shock.

• He would use copper-covered wires so that he would not get an electrical shock.

What is the main difference between conductors and insulators?

• Insulators are positively charged and conductors are negatively charged.

• Electrical currents move through conductors better than insulators.

• Electrical currents move through insulators better than conductors.

• Conductors have a neutral charge and insulators have a negative charge.

Abby builds a circuit with two lightbulbs as shown. Abby's circuit does not light up. What can be done to fix Abby's circuit?

• add a wire between the two bulbs

• add a second battery next to the first battery

• add a switch between the battery and one bulb

• add an insulator between one bulb and the battery

Tags

NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

Which two objects are necessary to complete an electric circuit?

• a light bulb and a switch

• a power source and a light bulb

• a path for energy to flow and a switch

• a power source and a path for energy to flow

Which of the following is true about electrical circuits?

• Electricity can only flow if the circuit is a closed loop.

• They have to involve a wire made of insulating material.

• Every circuit needs to have a switch that can stop and start the flow of electricity.

• An open circuit works as long as the wire connects a bulb to the positive end of a battery.

Why is it important to have a switch in an electrical circuit?

• To increase the voltage of the circuit.

• To control the flow of electricity.

• To decrease the resistance in the circuit.

• To change the direction of the current.

Tags

NGSS.MS-ETS1-1