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2.1 Kinetic particle model of matter

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Question 190

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

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

What are the moving specks of light?

A

air molecules being hit by other air molecules

B

smoke particles being hit by air molecules

C

smoke particles being hit by other smoke particles

D

air molecules being hit by 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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