Match the following columns.
Chemicals
Source of water
Usefulness
Chlorine
Swimming pool
Kill pathogens
Fluorine
Tap water
Ozone
Water fountain
Prevent tooth decay
U.V. rays
Important Questions on Processing of Water
Urja went to her friend's house, who stays near Varanasi. She saw that the water in the river Ganges was very dirty. She asked her friend how they drink this water. Her friend replied that for drinking purpose they boil the water. Urja thought only boiling cannot purify such dirty water. She advised her friend to use a water purifier.
Was Urja right in her suggestion for the use of water purifier? Why or why not?
Urja went to her friend's house, who stays near Varanasi. She saw that the water in the river Ganges was very dirty. She asked her friend how they drink this water. Her friend replied that for drinking purpose they boil the water. Urja thought only boiling cannot purify such dirty water. She advised her friend to use a water purifier.
Which three measures you would suggest for water purification?
Urja went to her friend's house, who stays near Varanasi. She saw that the water in the river Ganges was very dirty. She asked her friend how they drink this water. Her friend replied that for drinking purpose they boil the water. Urja thought only boiling cannot purify such dirty water. She advised her friend to use a water purifier.
Why do we need to have clean drinking water?
Urja went to her friend's house, who stays near Varanasi. She saw that the water in the river Ganges was very dirty. She asked her friend how they drink this water. Her friend replied that for drinking purpose they boil the water. Urja thought only boiling cannot purify such dirty water. She advised her friend to use........ a water purifier.
Write five uses of water in your notebook.
