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2.1 Kinetic particle model of matter

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Question 79

Tiny smoke particles are suspended in a closed glass cell containing air. A bright beam of light is shone into the cell from the side.

Looking through a microscope from above, small bright specks of light are seen to move in a continuous, random, and jerky manner.

What are these moving specks of light?

A

air molecules being bombarded by other air molecules

B

air molecules being bombarded by smoke particles

C

smoke particles being bombarded by air molecules

D

smoke particles being bombarded by other smoke particles

Markscheme

2.1 Kinetic particle model of matter Questions

  1. IGCSE
  2. /Physics
  3. /2.1 Kinetic particle model of matter

321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.

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