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2.1 Kinetic particle model of matter

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Question 259

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 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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