Junior Secondary · Science

Particle theory: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Particle theory.

10 questions22 marksFree, no account

Question 1

1 mark

Which statement best describes the movement of particles in all states of matter?

Question 2

1 mark

When a fixed amount of gas in a sealed rigid container is heated, the internal gas pressure increases. Which statement best explains this using the particle theory?

Question 3

1 mark

When a fixed amount of gas is heated in a rigid, sealed container, the gas pressure increases. Which of the following best explains this using the particle theory?

Question 4

1 mark

According to the particle model of matter, what is the simplest description of what matter is made of?

Question 5

1 mark

In a sealed container, the air exerts pressure on the inner walls. How is this pressure created according to the particle theory?

Question 6

2 marks

Using the particle theory, describe the relationship between the temperature of a substance and the movement of its particles.

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Question 7

3 marks

Explain the existence of atmospheric pressure using the basic ideas of the particle theory.

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Question 8

5 marks

Explain, using the particle theory, why a drop of blue food coloring added to a beaker of still water will eventually spread until the entire liquid is a uniform blue color.

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Question 9

3 marks

A student conducts an experiment where they mix \(50\text{ cm}^3\) of water with \(50\text{ cm}^3\) of pure alcohol in a measuring cylinder. After mixing, the student notices that the total volume of the mixture is only \(97\text{ cm}^3\).

(a) According to the particle theory, describe the arrangement and spacing of particles in a liquid state. (1 point)

(b) Explain why the total volume of the mixture (\(97\text{ cm}^3\)) is less than the sum of the individual volumes (\(100\text{ cm}^3\)) using the particle theory. (2 points)

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Question 10

4 marks

A student conducts an experiment comparing how quickly a scent travels through a room versus how quickly a drop of food coloring spreads in a beaker of still water.
(a) State which substance (the scent or the dye) will spread more quickly through its medium. (1 point)
(b) Use the particle theory to explain the difference in these speeds by comparing the arrangement and movement of particles in gases and liquids. (2 points)
(c) Predict how the rate of the dye spreading in the water would change if the water was heated from \(20^\circ\text{C}\) to \(60^\circ\text{C}\). (1 point)

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