CAIE IGCSE Physics 2.1.2.8 Microscopic particles may be moved by
Practise using correct particle language for Brownian collisions, distinguishing visible microscopic particles from fast molecules.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- predict that a smoke particle moves when struck by a fast molecule, while the molecule rebounds
- distinguish atoms or molecules from larger microscopic particles in collision descriptions
2.1.2.8—Microscopic particles may be moved by question 1
[Maximum number: 1]
A stationary smoke particle is hit by a fast-moving nitrogen molecule.
Which row describes the motion of the smoke particle and of the nitrogen molecule after the collision?
smoke particle
nitrogen molecule
moves
rebounds
moves
stops
remains stationary
rebounds
remains stationary
stops
A
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