Read Particles and phase changes · Class 6 Q38
This SOF ISO pattern tests interpret state and temperature. Read the condition carefully, then use the method below before you solve.
A phase change alters the arrangement and motion of particles without creating a new substance.
Particles change their freedom of movement
Heat → particles move more freely
Heating increases particle motion: solid → liquid → gas. During a phase-change plateau, energy separates particles instead of raising temperature.
Find the tested idea
Identify the material, change or observable property first; this decides the scientific rule to use.
Work from the evidence
Use the experiment or stated observation as evidence. Compare each option with the property, particle model or reaction condition in the stem.
Verify before choosing
Use the wording, diagram and units exactly as given. Select an option only after it satisfies every stated condition.
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- ✓State the observed property.
- ✓Select the governing idea.
- ✓Test every claim against the evidence.
Keep physical changes, chemical changes and everyday appearances separate.
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