More batteries, brighter bulb
Associate the brightness of a lamp or volume of a buzzer with the number and voltage of cells used in a series circuit
How to tell they’ve got it
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Try this together
Can your child explain why adding a second battery makes the bulb brighter, and predict what happens with three batteries?
Where this sits on the map
Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.
Builds on
Circuit vocabularyages 9–11Associating brightness with voltage requires 'voltage', 'current', and 'series circuit' vocabulary
How energy travels aroundages 9–10Energy transfer concept supports understanding voltage as energy per charge
More batteries, brighter bulbthis skill · ages 10–11
Unlocks
Drawing circuits with proper symbolsages 10–11Must understand circuit behaviour before representing circuits with formal symbols
Why circuit components behave differentlyages 10–11Must understand voltage-brightness relationship before comparing component variations
Current, voltage, and what they measureages 11–12KS2 observation that more cells gives brighter bulbs is the empirical foundation for defining voltage as energy per charge
solid = must come firstdashed = helps
Curriculum alignment
Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).
This skill sits outside the F–6 Australian Curriculum — no candidate code matched (v0.1). No NSW K–6 outcome code matched (v0.1). No Victorian Curriculum 2.0 code matched (v0.1).