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2.1.2a Particle structure and motion in solids, liquids and gases

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Question 92

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

2.1.2a Particle structure and motion in solids, liquids and gases Questions

  1. IGCSE
  2. /Physics
  3. /2.1.2a Particle structure and motion in solids, liquids and gases

151 exam-style questions on CIE IGCSE Physics 2.1.2a Particle structure and motion in solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.

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