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

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Question 112

In an experiment to demonstrate Brownian motion, smoke particles inside a closed cell are observed through a microscope.

What is the reason for the random, jagged movement of the smoke particles?

A

They are hit by fast-moving but invisible air molecules.

B

They are carried by convection currents created by the light source.

C

They collide with each other due to gravitational attraction.

D

They vibrate about fixed positions within the air cell.

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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