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GCSE Combined Science · key term
A state of matter with no fixed shape or volume; its particles are far apart and move rapidly in random directions.
Used by AQA and OCR
Specification 4.1.1.1 · Paper 1, Paper 2
Revise: Particle ModelIn a gas, particles are far apart and move rapidly in random directions. They spread throughout the available space, so a gas has neither a fixed shape nor a fixed volume.
Specification C1.1a · Chemistry Paper 1
A state of matter with no fixed shape or volume; its widely spaced particles move rapidly in random directions.
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Gas particles are far apart, with very weak attractions between them. They move rapidly in random directions, travelling in straight lines between collisions.
