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2.1 Kinetic particle model of matter

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Question 93

What causes the random, jittery movement (Brownian motion) of tiny pollen grains suspended in water?

A

water molecules colliding with the pollen grains

B

convection currents within the water due to temperature differences

C

pollen grains actively swimming using cilia

D

chemical reactions 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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