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Topic 1 - $100Gary built an electric circuit. When he finished building the circuit, he closed the switch. His circuit is shown below.

What happened when Gary closed the switch?

A The light came on and the buzzer made a sound at the same time. B The light and buzzer stayed off because there was no source of electric current in the circuit. C Nothing happened because the light and buzzer have to be in different circuits. D Nothing happened because the circuit needs two switches for two different elements.

Topic 1 - $100

B The light and buzzer stayed off because there was no source of electric current in the circuit.

Topic 1 - $200The electric circuit below consists of a battery, a switch, and three light bulbs.

What will happen if the switch is closed and Bulb A is removed?

A Bulbs B and C will go out. B Bulbs B and C will remain lit. C Bulb B will remain lit and Bulb C will go out. D Bulb C will remain lit and Bulb B will go out.

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Topic 1 - $200

A Bulbs B and C will go out.

Topic 1 - $300A circuit diagram uses symbols to represent each part of the circuit. A key lists the symbols used for the parts of the circuit. A circuit diagram is shown below.

What is the purpose of the wire in the circuit?

A to use the electric current B to connect the components C to provide a source of electrical energy D to change the circuit from open to closed



Topic 1 - $300

B to connect the components

Topic 1 - $400During planning for an investigation, Harriet draws four ways that she could connect a battery, a paper clip, a light bulb, and some wire. Which arrangement would light the bulb?

A

B

C

D



Topic 1 - $400

D.

Topic 1 - $500Sara starts to make an electric circuit using a battery, a light bulb, a paper clip, and some wire. She arranges the circuit’s parts as shown below.

Where would be the best place for Sara to put a piece of wire in order to complete the circuit?

A between the top of the battery and the top of the paper clip B between the top of the battery and the bottom of the light bulb C between the top of the paper clip and the bottom of the battery D between the top of the paper clip and the bottom of the light bulb



Topic 1 - $500

A. between the top of the battery and the top of the paper clip

Topic 2 - $100When the switch in the circuit below is closed, an electric circuit is completed.

Which devices will come on when the switch is closed?

A buzzer only B electric motor only C buzzer, electric motor, and light bulb D buzzer and electric motor, but not light bulb



Topic 2 - $100

C buzzer, electric motor, and light bulb

Topic 2 - $200

All electric circuits need certain components in order to work. Which of the following must be part of an electric circuit?

A copper wires B light bulb or buzzer C switch or circuit breaker D battery or other source of current

Topic 2 - $200

D battery or other source of current

Topic 2 - $300

Clayton tries to build an electric circuit using a battery, a light bulb, a paper clip, and copper wire. The diagram below shows what he builds.

Which statement best explains why the circuit would not conduct electricity?

A The circuit lacks a power source. B The circuit is not a complete loop. C The light bulb uses the electric current. D The paper clip stops the electric current.



Topic 2 - $300

B The circuit is not a complete loop.

Topic 2 - $400Roberto makes an electric circuit that has a switch as one of its parts. The diagram below shows the circuit that he makes.

What would happen to the light bulb if Roberto changes the switch from closed to open?

A It would be duller. B It would be brighter. C It would stop glowing. D It would start glowing.



Topic 2 - $400

C It would stop glowing.

Topic 2 - $500

Ryan is making a list of reasons that the bulb in his circuit does not light. Which of the following should not be on his list?

A The battery is dead. B The bulb is burnt out. C The wires make a complete loop. D One of the wires is disconnected.

Topic 2 - $500

D One of the wires is disconnected.

Topic 3 - $100Aaron built the circuit shown below.

Aaron tested the circuit and found that electricity was not flowing through it. Which statement describes why this occurs?

A There is no light bulb. B There is only one battery. C The circuit is not complete. D There are too many components.

Topic 3 - $100

C The circuit is not complete.

Topic 3 - $200

Serena is building an electric circuit. She will use it for a science project. Which of the following does Serena need for electricity to flow through the circuit?

A The circuit needs a light bulb. B The circuit needs an insulator. C The circuit must be open at one end. D The circuit must be a complete loop.

Topic 3 - $200

D The circuit must be a complete loop.

Topic 3 - $300

Sidney wants to make an electric circuit. She gathers the items shown below.

What additional item does Sidney need to make a complete circuit?

A a battery B a switch C an insulator D a conductor

Topic 3 - $300

A a battery

Topic 3 - $400

Jackson has an electric circuit made of a battery, a light bulb, a switch, and wires connecting each part. When Jackson opens the switch, there is a gap in the circuit. What happens when the switch is open?

A Electricity flows slowly. B Electricity flows nowhere. C Electricity flows into the air. D Electricity flows too quickly.

Topic 3 - $400

B Electricity flows nowhere.

Topic 3 - $500

Berto makes an electric circuit using two batteries, two lights, two insulators, and two conductors. Which of the following changes to the circuit could Berto make to increase the current flow?

A remove a light B remove a battery C remove an insulator D remove a conductor

Topic 3 - $500

C remove an insulator

Topic 4 - $100

Liam wants to determine if foam is a good insulator. He connects wires to two ends of a battery. He connects one wire to each end of a foam cup. Which observation would best support the conclusion that foam is a good insulator?

A Current flows for a short time and stops. B A weak current flows through the circuit. C A strong current flows through the circuit. D Current only flows through half the circuit.

Topic 4 - $100

B A weak current flows through the circuit.

Topic 4 - $200

Philippe needs to choose an item to use as the conductor in a circuit he is making. Which of the following items would be his best choice for a conductor of electricity?

A metal coin B glass bead C plastic straw D wooden toothpick

Topic 4 - $200

A metal coin

Topic 4 - $300 Jayden wants to compare how well different materials conduct electricity. He builds a circuit and uses various objects to complete the circuit. He compares how bright a light bulb glows using each object. The table below shows the results.

Which object is the best conductor of electricity? A nail B crayon C eraser D pencil lead

Object Glow

nail very bright

crayon dim

eraser very dim

pencil lead bright

Topic 4 - $300

A nail

Topic 4 - $400

Bradley makes an electric circuit using two batteries, two lights, two insulators, and two conductors. Which of the following changes to the circuit could Bradley make to increase the current flow?

A remove a light B remove a battery C remove an insulator D remove a conductor

Topic 4 - $400

C remove an insulator

Topic 4 - $500A simple electric circuit is shown below. When the paper clip is replaced with a wooden craft stick, the light bulb gets dimmer.

Which term best describes the craft stick?

A battery B insulator C generator

D conductor

Topic 4 - $500

B insulator

Topic 5 - $100Carla sorted materials into two groups based on how well they conduct electricity. The table below shows the groups.

Which material could Carla add to the group of conductors? A aluminum B glass C plastic D rubber

Conductors Insulators

gold wood

copper foam

chalk

Topic 5 - $100

A aluminum

Topic 5 - $200

Erina is testing common household objects. She is sorting them into good conductors of electricity and good insulators. Which object would be the best conductor of electricity?

A foam cup B metal knife C wooden toy D plastic comb

Topic 5 - $200

B metal knife

Topic 5 - $300

The diagram below shows the parts of a wire.

Which statement accurately describes the parts of the wire? A Copper and plastic are both good insulators. B Copper and plastic are both good conductors. C Copper is a good conductor, while plastic is a good insulator. D Copper is a good insulator, while plastic is a good conductor.



Topic 5 - $300

C Copper is a good conductor, while plastic is a good insulator.

Topic 5 - $400

Which of these elements is common to all electrical circuits?

A battery B conductor C insulator D wall outlet

Topic 5 - $400

B conductor

Topic 5 - $500

Some materials conduct electric current and other materials prevent the flow of electric current. Which object prevents the flow of electric current?

A salt water B rubber eraser C steel frying pan D copper water pipe

Topic 5 - $500

B rubber eraser

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