Why circuit components behave differently

CONCEPTUAL

Science›Energy|Ages 10—11|ID: mt_-QY08-88rw

Compare and give reasons for variations in how circuit components function, including brightness of bulbs, loudness of buzzers, and switch positions

Mastery Evidence

Explain why adding more components in series reduces brightness/loudness (energy shared)
Compare circuits with different configurations and predict component behaviour
Give reasoned explanations for observed variations in component function

Assessment Prompt

“If [child] adds a second bulb to a series circuit and it gets dimmer, can they explain why the energy is being shared between the two bulbs?”

Curriculum Standards1 alignment

Y6.Sci.E.2The national curriculum in England

Variations in how components function

compare and give reasons for variations in how components function, including the brightness of bulbs, the loudness of buzzers and the on/off position of switches

Science · Key Stage 2

Prerequisites2

Circuit vocabulary
hardAges 9—11
More batteries, brighter bulb
hardAges 10—11

Show full prerequisite tree

Circuit vocabulary hard
Comparing circuit component function requires component vocabulary: bulb, buzzer, switch, resistance
More batteries, brighter bulb hard
Must understand voltage-brightness relationship before comparing component variations
- How switches work hard
  Must understand switches and circuits before investigating voltage effects
  - Will the bulb light up? hard
    Must understand complete loops before understanding how switches open/close them
    - Building a simple circuit hard
      Must build circuits before predicting whether a lamp will light
      - What uses electricity at home hard
        Must identify electrical appliances before building circuits
- Circuit vocabulary hard
  Associating brightness with voltage requires 'voltage', 'current', and 'series circuit' vocabulary
- How energy travels around soft
  Energy transfer concept supports understanding voltage as energy per charge
  - Light & Seeing in the Dark soft
    Light knowledge supports understanding energy transfer by light
    - Light & Sound Vocabulary hard
      Observing that objects need illumination to be seen requires the 'light source' vocabulary
  - Naming types of energy hard
    Describing energy transfer by sound, light, heat, and electric current requires energy type vocabulary
  - Building a simple circuit hard
    Must know circuits before understanding energy transfer by electric current
    - What uses electricity at home hard
      Must identify electrical appliances before building circuits
  - Vibrations & Sound soft
    Sound knowledge supports understanding energy transfer by sound
    - Light & Sound Vocabulary hard
      Understanding vibrating materials and sound requires 'vibration' vocabulary
    - Communication with Light & Sound hard
      Must understand how sound works before designing a communication device using it
      - Light & Seeing in the Dark hard
        Must understand how light works before designing a communication device using it
        
        Light & Sound Vocabulary hard
        Observing that objects need illumination to be seen requires the 'light source' vocabulary

Unlocks2

Series vs parallel circuits
softAges 12—13
Drawing circuits with proper symbols
softAges 10—11