Name four ways in which water becomes dirty.

Choose the appropriate word and fill in the blank.

(Cooling, Boiling, filtering)

_____ water kill germs.

Choose the right word and fill in the blank:

We should not throw waste in _____. (dustbin/water bodies)

Fill in the blank with a suitable word:

_____ (Germs/charms) can make us ill. 

Fill in the blank with an appropriate word:

The oil from ships leaks into the water making it polluted with harmful _____ (microbes/chemicals).

Choose the right word and fill in the blank:

Something that pollutes water _____ (garbage/fish)

Define the term drainage.

Fill in the blank with a suitable word:

A good house should have a proper _____ (drainage/remote) system to carry away dirty water.

Match the following.