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- 1. Multiple Choice
Which statement best describes the fact that gases can be compressed?
The particles in a gas do not have a fixed volume.
The particles in a gas are very far apart.
The particles in a gas have no force of attraction (bonds) between them.
The particles in a gas are constantly moving very rapidly.
- 2. Multiple Choice
A substance has a boiling point of 90°C. What changes occur when it is heated from 50°C to 120°C?
energy of particles increase; attractive forces decrease
energy of particles decrease; attractive forces increase
energy of particles increase; attractive forces increase
energy of particles decrease; attractive forces decrease
- 3. Multiple Choice
The three states of matter are represented by diagrams X, Y and Z. Which change occurs during condensation?
X to Y
X to Z
Y to X
Z to X
- 4. Multiple Choice
Which description best matches this particle model?
Closely packed and vibrate about a fixed position.
Particles are close together but can slide past each other.
Particles have lots of energy and can move around.
- 5. Multiple Choice
When ice melts...
The mass of the water decreases during melting.
The mass of the water stays the same before, during and after melting.
The mass of the water is always changing.
The mass of the water increases during melting.
- 6. Multiple Choice
When a liquid becomes a solid, what are the changes in the behaviour of the particles? Select all that apply.
Particles lose energy
Particles are unable to overcome forces of attraction
Particles move closer together
The volume decreases
Particles become smaller
- 7. Multiple Choice
In a solid, ___________________. (Select all that apply).
Particles are packed closely together
Particles have a fixed shape
Particles vibrate about their fixed positions
Particles slide across one another
There are strong forces of attraction between particles.
- 8. Multiple Choice
What are the differences between steam and water vapour? Select all that apply.
Steam is formed through boiling, water vapour is formed through evaporation
Steam has greater kinetic energy than water vapour
Steam is formed at the boiling point, water vapour can be formed at temperatures below the boiling point.
- 9. Multiple Choice
How many changes of state occur in this graph?
1
2
3
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