English
Use
suitable interjection to each sentence from the box below. Write it in your
grammar notebook and submit on 20-03-17.
|
Oh, Great, Wow, Ouch, Hey,
Please, and No.
|
1. ________________ ! The
policemen are coming.
2. ________________, the
earth is shaking!
3. ________________, get
out of here!
4. ________________, I
love this class.
Science
Draw the following in an A4
sheet and submit the same on
21/3/2017.
S.St
Continue
these notes in your S.St. notebook and submit on Monday 20/3/2017.
Some ways to
store water are: -
1. Build dams – A dam is a very strong
wall built to hold water.
2. Rainwater harvesting- Rainwater is
stored, filtered and used later.
Q. Explain
the process of water purification.
Ans. There
are many ways of water purification. Some are as follows:-
1. Boiling – this is the simplest way to
purify water. Boiling for at least ten minutes will kill the germs in it.
2. Sedimentation – Water is allowed to
stand still in big containers, without being touched for a few hours. All the
mud and other sediments will settle down at the bottom of the container. The
water is separated gently without disturbing the sediments. This process of
separating impurities from water is called sedimentation.
3. Filtration – This is the process of
separating solids from liquids by pouring the content through a medium.
4. Chlorination – it is the process of
adding chlorine to water for purifying it to make it fit for drinking.
