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

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Question 65

Brownian motion can be observed when pollen grains are suspended in water.

Which of the following statements about this observation are correct?

  1. The motion of the pollen grains is caused by the constant bombardment of smaller, fast-moving water molecules.
  2. The pollen grains move in a continuous, smooth curved path.
  3. The average speed of the pollen grains increases when the temperature of the water is increased.
A

1 and 2 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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