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

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Question 124

Brownian motion is observed when using a microscope to look at pollen grains suspended in water.

What causes the pollen grains to move at random?

A

Pollen grains are hit by water molecules.

B

Pollen grains are moved by convection currents in the water.

C

Pollen grains have different weights and sink at different speeds.

D

Pollen grains hit the walls of the container.

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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