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

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Question 108

Brownian motion can be observed when viewing a suspension of pollen grains in water under a microscope.

What is the main cause of the random, jerky movement of these pollen grains?

A

The pollen grains are constantly hit by much smaller, fast-moving water molecules.

B

Convection currents in the water carry the pollen grains in different directions.

C

The pollen grains are living organisms that are actively swimming in the water.

D

Static electrical forces cause the pollen grains to repel one another.

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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