Enjoy with Social Life-5 [106-136] - School Books Publishers India

4. During cyclone :
(a) We should go near the sea.
(b) We should move away from the sea.
3
E. Answer the following questions :
1. What are natural disasters
Ans. A sudden event in the natural world that effects the life and
property of all living beings is called a natural disaster.
2. Why do epidemic spread
Ans. Epidemic are the post-calamatic impacts. They occur when diseases
spread on a large scale. They cause a large number of deaths within a
short period of time.
3. What are the causes of floods
Ans. Floods can happen by overflow of rivers due to excess rain or melting
of snow or even when dams release a lot of water.
4. What are the reasons of cyclones
Ans. Cyclones occur due to low pressure systems towards which winds travel
at a great speed. They occur in coastal areas and cause a lot of damage.
Project/Activity :
F. Try to find out what natural calamities we have faced in India and
what steps we should take to face them.
Ans. Do yourself.
G. Recently there was a severe flood in Bihar and an earthquake in
Jammu and Kashmir. Collect the informations about them from the
newspapers and magazines and prepare a report on them.
Ans. Do yourself.
12. The World of Growing Knowledge
Exercise
A. Write True or False :
1. Hieroglyphic was written in the form of pictures, signs and symbols.
True
2. The concept of zero and decimal was given by India. True
3. The paper was invented in India. False
4. The Arabs called the Indian numerals Arabic. False
5. Louis Braille invented a special script for the blind. True
B. Fill in the blanks :
1. The first writing was in the form of pictures.
2. Pictorial writing is also called pictographic.
3. Bhojpuri, Maithili and Brajbhasha are all dialects of Hindi.
4. The ancient Egyptians made paper out of the papyrus plant.
5. In India the skin of the Birch tree and the leaves of palm tree used as
paper.
6. The first European printing press was set up by John Gutenberg.
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Bookman India Enjoy with Social Life [1-5]