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1. What is the melting point of water in Celsius?
A
100°C
B
0°C
C
-10°C
2. At what temperature does water boil?
A
100°C
B
0°C
C
50°C
3. What is the state of water at 0°C ?
A
Liquid
B
Solid (ice)
C
Gas
4. What is the boiling point of water at higher altitudes?
A
Exactly 100°C
B
Less than 100°C
C
More than 100°C
5. What phase change occurs when water vapour turns into liquid water?
A
Condensation
B
Freezing
C
Evaporation
6. Which of the following is not a property of water?
A
It's particles are very far apart
B
Colourless
C
It takes the shape of the container
7. How many forms does water exist in?
A
3
B
2
C
4
8. Which image shows the particle model of a liquid
A
B
C
9. Which gas makes up the largest part of the Earth's atmosphere
A
Nitrogen
B
Oxygen
C
Carbon dioxide
10. Which one of the following is not a natural source of air pollution?
A
Factories
B
Wildfires
C
Duststorms