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2.1 Kinetic particle model of matter

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Question 257

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 Kinetic particle model of matter Questions

  1. IGCSE
  2. /Physics
  3. /2.1 Kinetic particle model of matter

321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.

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