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

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Question 86

Tiny smoke particles are suspended inside a transparent container filled with air (a smoke cell). A bright lamp shines light from the side. Looking through a microscope from above, small, bright, shimmering specks of light are seen to move around in a random, jerky manner. What are the moving specks of light?

A

air molecules being hit by other air molecules

B

smoke particles being hit by other smoke particles

C

air molecules being hit by smoke particles

D

smoke particles being hit by invisible air molecules

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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