GradeMap

Grade 7 · Science · Unit 3 of 6

Circuits & Static

Circuits, conductors and static charge

What your child practises

Complete circuits, series versus parallel wiring, conductors and insulators, adding cell voltages, and static electricity (like and opposite charges, lightning).

BC Curriculum learning standard: Electromagnetic force: electric circuits, conductors and insulators, static charge

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    What does a switch do in a circuit?

    • It stores extra electricity
    • It changes electricity into light
    • It makes the battery stronger
    • It opens or closes the loop to stop or start the current
    Show answer

    It opens or closes the loop to stop or start the current

    Hint: An open switch makes a gap in the loop; a closed switch completes it.

  2. Question 2

    What does a circuit breaker or fuse do?

    • It turns AC into sunlight
    • It adds extra current when needed
    • It stores power during a blackout
    • It breaks the circuit if too much current flows, preventing overheating
    Show answer

    It breaks the circuit if too much current flows, preventing overheating

    Hint: Too much current makes wires hot. A breaker 'trips' to open the circuit before that becomes dangerous.

  3. Question 3

    Conductor or insulator? Sort each material.

    Sort into: ⚡ conductor · 🚫 insulator

    • 🪟window glass
    • 🪵dry wood
    • ✏️graphite pencil lead
    • 🔌copper wire
    • 🧶wool yarn
    • 🥄steel spoon
    • 🔩iron nail
    • 🧤rubber glove
    Show answer

    ⚡ conductor: graphite pencil lead, copper wire, steel spoon, iron nail · 🚫 insulator: window glass, dry wood, wool yarn, rubber glove

    Hint: Conductors let electric current flow easily (most metals, graphite, salt water). Insulators block it (plastic, rubber, glass, dry wood).

  4. Question 4

    Which part of a circuit is the source of electrical energy?

    🔋
    • the switch
    • the wire
    • the bulb
    • the battery
    Show answer

    the battery

    Hint: A battery (or cell) pushes the current around the circuit.

  5. Question 5

    A parallel circuit has 4 identical bulbs and a battery. One bulb burns out. How many bulbs stay lit?

    💡💡💡💡

    answer box

    Show answer

    3

    Hint: In a parallel circuit, each bulb is on its own branch. The other branches are still complete, so those bulbs stay lit.

  6. Question 6

    Each cell gives 1.5 V. If 4 cells are connected in series (end to end), what is the total voltage?

    🔋🔋🔋🔋

    answer boxV

    Show answer

    6 V

    Hint: Cells in series add their voltages: 1.5 V × 4.

More Grade 7