Junior Secondary · Science

Particle model for the three states of matter: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Particle model for the three states of matter.

10 questions27 marksFree, no account

Question 1

1 mark

In the particle model for the three states of matter, which statement best describes the distance between particles in a gas compared to a solid?

Question 2

1 mark

Which of the following best describes the motion of particles in a solid at room temperature?

Question 3

1 mark

An object with a mass of \(200\text{ g}\) and a volume of \(250\text{ cm}^3\) is placed in a large tank of water. If the density of water is \(1\text{ g/cm}^3\), will the object float or sink, and why? (Use the particle model context of density).

Question 4

1 mark

The diagram below represents the arrangement of particles in different states. In which state of matter are the particles arranged in a regular pattern and held closely together?

Question 5

1 mark

According to the particle theory, what happens to the motion and spacing of particles in a metal rod as it is heated from \(20^{\circ}\text{C}\) to \(80^{\circ}\text{C}\)?

Question 6

2 marks

How do the forces of attraction between particles differ between a solid and a gas?

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Question 7

3 marks

Explain why liquids have a definite volume but no fixed shape, based on the particle model.

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Question 8

6 marks

A balloon filled with air is placed inside a cold freezer. Using the particle model, explain why the volume of the balloon decreases even though no air is removed.

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Question 9

3 marks

Describe the arrangement and motion of particles in a solid, a liquid, and a gas according to the particle model. How does adding heat energy generally affect the motion of particles in any state of matter?

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Question 10

8 marks

A pure substance is trapped inside a sealed gas syringe. Initially, the substance is a liquid at room temperature.
(a) Describe the arrangement and motion of the particles in the liquid state. (2 points)
(b) The syringe is heated until the substance boils and turns into a gas. Describe how the spacing and average speed of the particles change. (2 points)
(c) If the syringe plunger is pushed in (decreasing the volume) while the temperature is kept constant, use the particle model to explain why the gas pressure increases. (2 points)
(d) How does the density of the substance in the gaseous state compare to its density in the liquid state? Justify your answer using the relationship between mass, volume, and particle spacing. (2 points)

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