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A glass beaker holds a clear liquid. A spoonful of baking soda is added and the mix erupts into lively fizzing and popping that gradually softens.

C1-1-46 Steady State · source_material principle: Fluid sounds (Fluid)
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Per-prompt rubric

Basic standards

Visual presence

  • a glass beaker
  • a clear liquid
  • baking soda
  • a spoon

Event: baking soda is added to a liquid in a beaker

Audio presence

  • a liquid mixture

Sound: fizzing and popping

Key standards

Visual physical commonsense (V-PC)

  • A glass beaker visibly holds a clear liquid before the spoonful of baking soda is added.
  • After the baking soda enters the liquid, visible effervescence forms in the beaker and gradually subsides.

Audio physical commonsense (A-PC)

  • The dominant audible sound is fizzing and popping that gradually softens over time.

Cross-modal physical commonsense (AV-PC)

  • The fizzing sound onsets when the baking soda visibly enters the liquid.