Question: Only one circuit below will light the bulb. Which one will work? Why is that the only circuit that will work?
Reference answer: That circuit is the only circuit that uses all of the correct contact points.

Student answer: It is the only circuit that will work because the metal is touching the bottom and the wire is touching the bottom of the light.

Student answer: C because it is on the square part and on the round ball.

Student answer: It is the only one because the wire is touching the middle and the battery is touching the side.

Student answer: It is touching all it need to make it to work.

Student answer: The electricity flows through the plus and the minus to a circle to the light bulb.

Student answer: Because the light is touching the battery.

Student answer: The electricity flow in a complete circle.

Student answer: It is because it is the only one that allows the electricity to go in a complete circuit.

Student answer: It has to run in a circle.

Student answer: It is touching both sides of the battery and the light bulb.

Student answer: Because it is the only one that will form a complete circuit.

Student answer: The wires have to touch the light bulb so like a circle of air to light up the light bulb.

Student answer: Because there is a full circuit.

Student answer: Because the equal part is touching.

Student answer: The negative and positive are on both parts of the battery.

Student answer: It will work because the circuit will go through the battery is because the force will go through the battery.

Student answer: Because D is the only circuit that is touching the black dot.

Student answer: The wire has to touch both sides of the battery and the wire has to touch the middle of the light bulb.

Student answer: On the other there is connection with the D-cell with the light.

Student answer: It is because answer D's wire starts below the light bulb.

Student answer: The only circuit will work because the 2 wires are put in the right place.

Student answer: Because they are going in a complete circuit.

Student answer: Because it is the only one that is touching.

Student answer: D because it is touching the base metal.

Student answer: It will work because it is the only one touching the light bulb base.

Student answer: Because the electricity goes to the metal and that electricity goes to the filament.

Student answer: Because the others are not complete circuits.

Student answer: I will work because electricity is going from the positive to the negative.

Student answer: Why it is the only one is because sometimes you need 2 wires and how it is the only one it is connected to the bottom.

Student answer: Letter A is the right one because the wire have to touch the equal side and the light bulb.

Student answer: The charge of the positive negative is flowing to the bulb.

Student answer: Because the negative is connected to the black part and the positive side is attached to the shiny part.

Student answer: Because the negative is connected to the black part and the positive side is attached to the shiny part.

Student answer: Because the white thing is touching the negative side.

Student answer: Because the shiny part and the wire is touching the black part.

Student answer: Because one side of the wire is touching the negative side of the D-cell.