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Will the Bulb Light? is a free printable Grade 4 science worksheet on evidence that an electric current carries energy only around a complete loop, aligned to NGSS performance expectation 4-PS3-2. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 7 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Will the Bulb Light?

4-PS3-2

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Will the Bulb Light?

Results from one battery, one bulb and some wires, set up eight different ways. ONE BATTERY, ONE BULB, EIGHT SET-UPS All the wires joined in a loop ............ bulb lit One wire left loose ....................... bulb off A foil strip across the gap ............... bulb lit A wooden lolly stick across the gap ....... bulb off A steel paperclip across the gap .......... bulb lit A plastic ruler across the gap ............ bulb off A buzzer added into the loop .............. bulb lit dimly, buzzer sounded Bulb taken out, buzzer still in the loop .. buzzer silent After a minute, the lit bulb felt warm. Same battery, same bulb, same wires every time.

  1. 1. The lit bulb felt warm. Where did that energy come from?
  2. 2. What happened when the foil strip was put across the gap?
  3. 3. What happened with the plastic ruler across the gap?
  4. 4. What was kept the same in every set-up?
2.A buzzer and a bulb are in the same loop. The wire breaks. What happens?
  • A.Only the buzzer stops
  • B.Both stop, because the loop is no longer complete
  • C.Both get louder and brighter
3.Why are electrical wires made of metal inside?
  • A.Metal makes the wire heavier
  • B.Metal is the cheapest material
  • C.Metal lets the current through, so energy can travel along it
4.Which shows electric current turning into sound?
  • A.A buzzer sounding when the switch closes
  • B.A bulb glowing
  • C.A heater warming a room
5.What does a switch do in a circuit?
  • A.It stores the energy
  • B.It opens or closes a gap in the loop
  • C.It makes the battery stronger
6.Where does the energy that lights a flashlight bulb come from?
  • A.The switch
  • B.The batteries, which store energy
  • C.The bulb itself
7.A bulb lights at the far end of a long wire. What does that show?
  • A.Energy traveled along the wire from the battery
  • B.The bulb stored the energy beforehand
  • C.The wire made its own light

LessonPrint · 4-PS3-2 · Set 7 · free to copy for classroom use

Answer key — Will the Bulb Light?

Set 7. Prints on its own sheet.

  1. 1.1. From the battery, carried along the wires to the bulb. 2. The bulb lit. 3. The bulb stayed off. 4. The same battery, the same bulb and the same wires.
  2. 2.Both stop, because the loop is no longer complete
  3. 3.Metal lets the current through, so energy can travel along it
  4. 4.A buzzer sounding when the switch closes
  5. 5.It opens or closes a gap in the loop
  6. 6.The batteries, which store energy
  7. 7.Energy traveled along the wire from the battery

Last reviewed 2026-09-05. Aligned to 4-PS3-2 of the Next Generation Science Standards.