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A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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More batteries, brighter bulb

Science · Energy · conceptual

Associate the brightness of a lamp or volume of a buzzer with the number and voltage of cells used in a series circuit

What mastery looks like

  • Describe the pattern: more cells (or higher voltage) = brighter bulb / louder buzzer
  • Explain that more cells provide more energy to the circuit
  • Predict the effect of changing the number of cells on a component's behaviour

Check your understanding

Can More batteries, brighter bulb explain why adding a second battery makes the bulb brighter, and predict what happens with three batteries?