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Course: Alhussan Chemistry — Stage 7
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Alhussan Chemistry — Stage 7

Chapter 1: The Particle Model and States of Matter

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Chapter 2: Elements, Compounds and Mixtures

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Chapter 3: Metals and Non-Metals

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Chapter 4: Chemical Reactions 1

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Chapter 5: Acids and Alkalis

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Chapter 6: The Earth and Plate Tectonics

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Quiz

1.6 Changes of state — Quiz

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  • Questions count: 10
  • Passing grade: B+
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1.
Why does the temperature stay constant while a solid melts?
Energy is used to overcome the forces between particles
The particles get bigger
The particles stop moving
No energy is supplied
2.
At what temperature does pure water freeze?
−10 °C
100 °C
4 °C
0 °C
3.
True or false? Melting does not change the separation of the particles much, because they touch in both states.
True
False
4.
When a liquid freezes, energy is ____ to the surroundings.
destroyed
absorbed
released
created
5.
Which term matches this definition? “The temperature at which a solid turns into a liquid.”
Freezing range
Melting point
Dew point
Boiling point
6.
True or false? Wax has a higher melting point than most metals.
True
False
7.
The heating curve shows ice being heated. What is happening between 4 and 8 minutes?
Dr Dabour Hub Academy - figure 1
The water is boiling
The steam is cooling
The ice is melting at 0 °C
The ice is warming up
8.
On the same heating curve, what happens at 100 °C (from 14 minutes)?
Dr Dabour Hub Academy - figure 2
The ice melts
The water freezes
The steam condenses
The water boils
9.
Ice at -20 °C is heated to 0 °C. What is the temperature rise?
0 °C
−20 °C
20°C
−20°C
10.
A cooling curve is:
The same as a bar chart
Always flat
The mirror image of a heating curve
A straight line upwards
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Part of Chapter 1: The Particle Model and States of Matter — see every lesson and quiz in this unit.
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