Make the idea your own
- 1Compare a fixed arrangement with close mobile particles.
- 2Select gas to see particles spread through the container.
- 3Press Play to compare their motion; particle size does not change.
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Class 8 · Chemistry
Inside a state of matter
Interactive explanation Gamified quiz, feedback & rewards
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Suggested-level exploration · Learning goals & preparation
By the end, you can…
- Explain Same particles · different arrangement and motion
- Change one input at a time and predict its effect before checking the model.
- Apply the relationship in a quiz and explain the reasoning behind your answer.
Useful preparation: Counting particles, ratios and the difference between a model and a real substance.
This topic has a suggested learning level. A matching chapter in the current NCERT edition has not been verified, so it is not labelled as syllabus coverage.
Hands-on explainer · Class 8
Inside a state of matter
Class 8
CLASS 8 · CONCEPT QUEST
Turn understanding into a small adventureInside a state of matter
Discover the rule, predict what happens, then solve a hands-on mission.
DiscoverFind the idea→PredictThink it through→BuildMake it click
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The relationshipSame particles · different arrangement and motion
Explain the experiment
When the goal is met: The gas fills the container. The spaces and movement change; the particles themselves do not swell.