Curriculum
Course: Alhussan Physics — Stage 9
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Curriculum

Alhussan Physics — Stage 9

Chapter 11: Forces and Density

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Chapter 12: Energy Transfer

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Chapter 13: Sound Waves

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Chapter 14: Electrical Circuits, Resistance and Power

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Chapter 15: The Earth in Space (Universe and Stars)

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Quiz

12.6 Cooling by evaporation — Quiz

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  • Questions count: 10
  • Passing grade: B+
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1.
Why does evaporation cool a liquid?
Particles get bigger
Energy is destroyed
Air freezes the liquid
The fastest particles escape, lowering the average speed
2.
Which term matches this definition? “Liquid changing to gas at the surface at any temperature.”
Boiling
Melting
Evaporation
Condensation
3.
True or false? Evaporation happens only at the boiling point.
True
False
4.
At a higher temperature, the average ____ of particles is higher.
mass
speed
colour
size
5.
True or false? Sweating cools the body by evaporation.
True
False
6.
Which speeds up evaporation?
A lid
Wind and a larger surface area
High humidity
Cold and still air
7.
The graph shows the speed of particles in a liquid. Which particles evaporate?
Dr Dabour Hub Academy - figure 1
All particles equally
The very fast particles at the surface
None
The slow particles
8.
A wet cloth's mass fell from 60 g to 42 g in 30 min. What was the evaporation rate?
3.4 g/min
2.0 g/min
0.6 g/min
540.0 g/min
9.
Why does a wet thermometer bulb read lower than a dry one?
It absorbs light
Water is always cold
Evaporation cools it
It is broken
10.
After evaporation, the remaining liquid:
Is hotter
Has the same temperature
Is cooler
Freezes immediately
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Part of Chapter 12: Energy Transfer — see every lesson and quiz in this unit.
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