Worksheet

Simple Circuits

Grade 4 - Science - Challenge Me

NameDate

  1. Circuit parts: battery -> switch -> LED -> resistor -> battery. Why can the device work?

    • the path is open so current cannot return
    • the loop is complete, so current can light the LED
    • an insulator blocks the device from the loop
    • only the battery terminal is connected

  2. A circuit fails because the LED is turned the wrong direction. Which fix should be tested first?

    • replace the metal path with plastic
    • leave the switch open and retest
    • reverse the LED so current can pass through it
    • add another loose wire without connecting it

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

    • dry cardboard
    • plastic straw
    • wooden craft stick
    • aluminum foil strip

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

    • eraser
    • metal nail
    • copper strip
    • metal clip

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

    • electrical energy changes to light in the bulb
    • light energy changes to electrical energy and then sound
    • electrical energy changes to motion in the fan
    • electrical energy changes to light and heat in the bulb

  6. Circuit parts: battery -> closed switch -> bulb -> wire -> battery. Why can the device work?

    • an insulator blocks the device from the loop
    • the path is open so current cannot return
    • the closed switch completes the circuit so the bulb can light
    • only the battery terminal is connected

  7. A circuit fails because the solar cell is shaded. Which fix should be tested first?

    • replace the metal path with plastic
    • leave the switch open and retest
    • move the solar cell into brighter light
    • add another loose wire without connecting it

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

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

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

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

  10. Circuit design: battery -> motor -> wire -> battery. 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 and heat in the bulb
    • electrical energy changes to light in the bulb
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