Science Circuit Quiz

Susan is making a circuit like the one shown below in science class. The circuit has a switch that can be open or closed. Her teacher tells her to only touch the black plastic parts of the switch. She should not touch the metal parts. Why should Susan not touch the metal parts of the switch?

• The switch can only be closed by touching the black plastic parts.

• Her finger could touch two metal parts and make a closed circuit.

• The metal could be melted by the heat of her finger.

• Electricity will not flow if she is touching the metal.

The picture below shows an electric circuit. What is the source of electric energy in the circuit?

• the light bulb

• the battery

• the fan

• the wires

Aliyah and Jeremy constructed a flashlight in science class. They want to use it to help them see at night. After constructing the circuit, Aliyah and Jeremy noticed that the light bulb stays on all the time. This means the batteries will get used up when the flashlight does not need to be on. What is something Aliyah and Jeremy can do to solve this problem?

• They could add a switch to the circuit.

• They could move the light bulb closer to the battery.

• They could connect more batteries to the circuit.

• They could use longer wires.

Of the three circuits above, which light bulbs will light up?

• Z only

• X and Z

• Y only

• Y and Z

Erik wants to make a device that converts electrical energy to light energy. His teacher helps him use wires to connect a battery to a small light bulb. Erik wants to test ways to make brighter light. What is the best way for him to test this?

• use different kinds of light bulbs

• use different colors of wire

• hold the light bulb in different places

• make the wires not touch the battery

Which of these is a complete closed circuit that electricity will flow through?

• W

• X

• Z

• Y

The pictures below show a circuit made of wires, a battery, and a light bulb. Which picture best shows the direction that electric current flows in the circuit?

• X

• W

• Z

• Y

Which of these is required to make a circuit?

• a closed loop

• static electricity

• two batteries

• a light bulb

Marcus has a circuit that uses a battery to light up a light bulb. He needs three wires to make his circuit. He changes the circuit to have a paper clip attached to wire 2 as shown in the picture below. What should Marcus predict will happen when he connects wire 3 to the paper clip?

• The paper clip will turn black.

• The battery will die.

• The light bulb will light up.

• The light bulb will break.

Esperanza's teacher is doing a circuit demonstration. The circuit that her teacher is building is similar to the one shown below. What else needs to be done for the circuit to produce light energy?

• A wire needs to be added between the light bulb and the battery to close the circuit.

• A load needs to be added next to the battery to produce more energy.

• A load needs to be added next to the battery to produce less energy.

• A wire needs to be added between the light bulb and the battery to open the circuit.