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

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Question 100

An experiment is set up to observe the Brownian motion of smoke particles in air.

Consider the following three statements:

  1. The smoke particles move in a continuous, random, zig-zag motion.
  2. The air molecules can be observed directly under a light microscope.
  3. The motion of the smoke particles is caused by uneven collisions with much smaller, fast-moving air molecules.

Which of these statement(s) is/are correct?

A

1 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

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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