20 Questions
Which physical state of water requires the most energy to change to another state?
Gas (water vapor)
At what temperature does water boil?
100°C
What process occurs when water changes from a gas to a liquid state?
Condensation
What is the primary factor that affects the rate of evaporation of water?
Surface area exposed to air
What process occurs when water changes from a liquid to a gas state?
Evaporation
What is the primary factor that affects the rate of dissolving of a solute in water?
Temperature of water
What process occurs when water changes from a solid to a liquid state?
Melting
What is the primary factor that affects the rate of condensation of water vapor?
Temperature
What is the process called when water droplets in a cloud fall as rain?
Precipitation
What is the process called when clouds are carried to other places by the wind?
Transportation
Which of the following statements is true about solubility in water?
The solubility of a substance in water changes with temperature
Which of the following is NOT a type of impurity that can be removed by sedimentation and filtration?
Mineral salts
Which method can be used to kill microorganisms in water?
Chlorine
What can happen during a red tide?
All of the above
How can human and animal waste in water be harmful?
It can carry harmful microorganisms
What is the main cause of water pollution?
All of the above
What is the water treatment process in Hong Kong?
Sedimentation, filtration, adding chlorine and fluoridation
What can happen if we eat seafood contaminated with toxins during a red tide?
We may get poisoned
Why is fresh water a precious natural resource?
It is limited in supply
What can happen if the population of algae increases rapidly in water?
A red tide may result
Test your knowledge of the different states of water and the changes it undergoes with this quiz. From melting ice to boiling water, see if you can match the temperature at which each process occurs and the energy absorbed or released.
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