A boy placed a glass half-filled with cold water on the table and observed the water droplets only in 'Y' portion. Why do water droplets form on the surface of the glass? Why do water droplets not form in the portion 'X'?
Important Questions on Water
How are clouds formed? Explain.
How do living things get continuous supply of water on the earth?
Alok found many dead fishes on the bank of a water resource near a factory. What is the possible reason for this? How can it be controlled?
Why are floods and drought caused? How do they affect us?
A group of students have made the given setup in a laboratory to measure the boiling point of water.
At what temperature does water boils? 
A group of students have made the given setup in a laboratory to measure the boiling point of water.
What is the change of state when water boils.
A group of students have made the given setup in a laboratory to measure the boiling point of water.
Name the process involved in the change. 
A group of students have made the given setup in a laboratory to measure the boiling point of water.
The students turned off the burner and left the setup undisturbed for a day. Next day, they observed that the water level decreased in the flask. Why does this happen?
