Will the bulb light up?
Identify whether or not a lamp will light in a simple series circuit, based on whether the lamp is part of a complete loop with a battery
Lesson
Set out your lesson
“Will the bulb light up? means predicting if a lamp lights only when it is part of a complete loop with a battery. We will practise once together, then check a fresh example.”
Bring to the table
- Paper circuit drawings: complete loop vs gap vs bulb off the loop
- Optional: battery pack, bulb, wires (adult-supervised kit only)
Extra for the adult
Worked example. Battery–wire–bulb–wire–battery closed: lights. Any gap or bulb left out: no light.
Optional challenge. For Will the bulb light up?, fix a broken sketch by closing the loop.
What to notice. Keep one parent note: predictions; loop reason; support used. This session samples complete-loop thinking, not mastery of every wiring skill.
Share and support
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Teaching approaches
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1 approach
Will the bulb light up? means predicting if a lamp lights only when it is part of a complete loop with a battery. We will practise once together, then check a fresh example.
Spend about 12 minutes judging three circuit sketches for light/no light, then checking a fresh sketch.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Practice this concept
Start practiceWill the bulb light up practice
Predict lighting from complete loops in simple series circuits.
Free · no login · no ads · Practice answers and completion are not saved. Parent observation remains the lesson record.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
PhET Interactive Simulations · Practice link — not the full lesson
Circuit Construction Kit: DC
Before you open · source notes
Circuit Construction Kit: DC supports hands-on exploration for Will the bulb light up?. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Circuit Construction Kit: DC.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Predict whether a lamp will light by tracing the circuit for a complete loop
- Explain that a gap anywhere in the circuit breaks the loop and the bulb won't light
- Identify the fault in a non-working circuit (e.g. loose wire, missing connection)
“If your child looks at a circuit diagram, can they tell you whether the bulb will light up or not, based on whether there's a complete loop?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Energy
- Age range
- Ages 8–9
Standards