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4. The fastest way to communicate is through:

(i) telephone (ii) newspaper (iii) letters

5. Smartphones can be used to:

(i) make phone calls (ii) listen to music (iii) both (a) & (b)

C. Fill in the blanks:

1. National ____________connect important cities in India.

2. ____________ are flying machines that can land where aeroplanes cannot.

3. The first Indian ____________ was sent by an Irish doctor William O’.

Shallghnessy, in 1850.
4. ____________ are phones that can be carried along with you.

5. ____________ give us news and information about events from all over
the world.

D. Write ‘T’ for true and ‘F’ for false statement:

1. Transporting goods by ships is cheaper than by train.

2. The coming of private airlines has made air travel in India more

expensive.

3. In the olden days, people send messages through sparrows.

4. For sending an e-mail, an Internet connection is necessary.

5. Television and radio signals can only be received in important cities
in India.

E. Answer the following questions:

1. Why is road transport considered to be the most convenient?
_____________________________________________________________

2. What are the advantages of air travel?

_____________________________________________________________

3. Why are helicopters used in times of natural calamities to transport food?

_____________________________________________________________

4. How do satellites help in sending television signals?

_____________________________________________________________

84 Social Studies-4