Worksheet

Simple Circuits

Grade 4 - Science - On Level

NameDate

  1. Circuit parts: battery -> wire -> bulb -> wire -> battery. Why can the device work?

    • only the battery terminal is connected
    • a complete loop lets electric current transfer energy to the bulb
    • an insulator blocks the device from the loop
    • the path is open so current cannot return

  2. A circuit fails because the switch is open. Which fix should be tested first?

    • replace the metal path with plastic
    • close the switch to complete the loop
    • add another loose wire without connecting it
    • leave the switch open and retest

  3. Which material is most likely to act as a conductor in a simple circuit?

    • brass clip
    • dry cardboard
    • cloth strip
    • plastic straw

  4. Which material is most likely to act as an insulator?

    • plastic spoon
    • metal paper clip
    • metal clip
    • copper strip

  5. Circuit design: battery -> motor -> wire -> battery. What energy conversion happens when it works?

    • electrical energy changes to motion in the motor
    • electrical energy changes to motion in the fan
    • electrical energy changes to light in the bulb
    • electrical energy changes to light in the LED

  6. Circuit parts: solar cell -> wires -> buzzer -> solar cell. Why can the device work?

    • the path is open so current cannot return
    • an insulator blocks the device from the loop
    • a complete loop lets energy reach the buzzer
    • only the battery terminal is connected

  7. A circuit fails because one wire is not touching the battery. Which fix should be tested first?

    • replace the metal path with plastic
    • connect the loose wire to the battery
    • add another loose wire without connecting it
    • leave the switch open and retest

  8. Which material is most likely to act as a conductor in a simple circuit?

    • steel fastener
    • plastic straw
    • dry cardboard
    • cardboard tab

  9. Which material is most likely to act as an insulator?

    • cloth strip
    • copper strip
    • brass clip
    • metal clip

  10. Circuit design: solar cell -> wires -> buzzer -> solar cell. What energy conversion happens when it works?

    • electrical energy changes to light in the LED
    • electrical energy changes to motion in the motor
    • electrical energy changes to light in the bulb
    • light energy changes to electrical energy and then sound
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