Drawing circuits with proper symbols · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Drawing circuits with the right symbols

Science · Energy · ages 10-11
Name ______________________   Date ____________

  1. Noah looks at a circuit diagram. One part is drawn as two lines side by side, one long and one short. Which real part does it stand for?

    • The wire
    • The cell
    • The switch

  2. Which symbol is used to show a bulb in a circuit diagram?

    • A circle with an X inside
    • A drawing of a lightbulb with a screw base
    • A plain circle with no marks

  3. A teacher asks Mia to use straight ruled lines for wires in a circuit diagram. Mia uses a ruler to draw straight line segments between the component symbols. True or false: Mia follows the wire-drawing instruction.

    Circle one:   True   False

  4. On her circuit diagram, Priya draws one part as a circle with the letter M inside. Which real part should go in that spot?

    • The motor
    • The bulb
    • The buzzer

  5. A diagram shows one cell, one switch, and one bulb in a single loop, with no branches. If the switch is closed, what happens?

    • The bulb stays off no matter what
    • The cell stops working
    • The bulb lights up

  6. In this doorbell diagram, the classroom key describes a buzzer as a half-circle dome on a straight base. Which description matches that buzzer symbol?

    • A circle with an X inside it
    • A half circle on a flat base
    • A gap in the line with a tilted lever

  7. Ben is asked to use standard symbols and straight ruled wires. He draws a realistic glowing bulb and wobbly wires. Which features do not follow those drawing instructions?

    • He drew pictures, not symbols, and his wires wobble
    • He used too many wires, so the loop became much longer than needed
    • He forgot the cell, so the bulb could not light

  8. A diagram shows a cell, a switch, and two bulbs, all in one single loop with no other branches. When the switch is open, what does the diagram tell you?

    • Only one bulb lights, because it is nearest the cell
    • Both bulbs glow dimly, because the open switch shares current
    • No current flows, so both bulbs stay off in the single loop
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Drawing circuits with the right symbols W1-mt_NzNLYDb9CZ-s1

  1. The cell · Two lines side by side, one long and one short, is the symbol for a cell.
  2. A circle with an X inside · The standard bulb symbol is a circle with an X inside, not a realistic drawing.
  3. True · Mia draws straight line segments with a ruler, exactly as requested. The statement is true. This instruction concerns the diagram, not the shape of real wires.
  4. The motor · A circle with the letter M inside is the symbol for a motor, so a real motor belongs in that spot.
  5. The bulb lights up · A closed switch completes the loop, so current can flow all the way round and light the bulb.
  6. A half circle on a flat base · The supplied key describes a half-circle dome on a straight base. That matches "A half circle on a flat base". The other descriptions show a bulb and an open switch in this classroom convention.
  7. He drew pictures, not symbols, and his wires wobble · Ben's realistic bulb and wobbly wires do not follow the stated drawing instructions. Wobbly lines alone do not establish that a real circuit would fail.
  8. No current flows, so both bulbs stay off in the single loop · An open switch breaks the only path in the loop, so no current can reach either bulb.
Worksheet · LightMySky