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

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Question 122

What causes the random, zig-zag movement (known as Brownian motion) of pollen grains suspended in still water?

A

Pollen grains colliding with each other

B

Convection currents within the water due to temperature differences

C

Invisible, fast-moving water molecules colliding with the pollen grains

D

Chemical reactions occurring between the pollen grains and the water 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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