NCERT Solutions Class 11 Geography Chapter 3 Latitude Longitude and Time

NCERT Solutions for Class 11 Geography for Chapter 3 Latitude Longitude and Time

Exercise

1. Answer the following questions in about 30 words:

(i) Which are the two natural points of references on the earth?

Answer: North and South Poles are the two natural points of references on the earth. The spinning of the earth on its axis from west to east provides these two natural points.

(ii) What is a great circle?

Answer: A Great Circle is a circle on the surface of the earth that divides the earth into two equal halves. For example, equator is the largest circle and divides the globe into two equal halves.

(iii) What are coordinates?

Answer: The latitudes and longitudes are commonly referred to as geographical coordinates as they provide systematic network of lines upon which the position of various surface features of the earth, can be represented.

(iv) Why does the sun appear to be moving from east to west?

Answer: The sun appear to be moving from east to west because the earth rotates from west to east over its axis and takes 24 hours to complete one rotation.

(v) What is meant by local time?

Answer: The time based on the meridian through a specific place, as a city, in contrast to that of the time zone within which the place is located is called local time.

2. Distinguish between latitudes and longitud

Answer:


Latitude

Longitude

Run from East-west, parallel to the equator

Run from North to South

Used to demarcate temperature zones

Used to determine local time

Lines are parallel to each other

Lines converge at the poles

The distance between the two latitudes is approximately 111 km

The distance between the two longitude is maximum at equator, i.e., 111.3 km and minimum at poles , i.e., 0 km.

Latitude measures up to 180 degrees, i.e., 90° N and - 90° S.

Longitude measures up to 360 degrees


ACTIVITY

1. Find out the locations of the following places with the help of your atlas and write their latitudes and longitud

Place

Latitude

Longitude

Mumbai

  

Vladivostok

  

Cairo

  

New York

  

Ottawa

  

Geneva

  

Johannesburg

  

Sydney

  

Answer:

Place

Latitude

Longitude

Mumbai

19° 4' N

72° 52' E

Vladivostok

43° 10' N

132° 0' E

Cairo

30° 2' N

31° 14' E

New York

40° 42' N

74° 0' W

Ottawa

45° 25' N

75° 41' W

Geneva

46° 12' N

6° 8' E

Johannesburg

26° 12' S

28° 2' E

Sydney

33° 52' S

151° 12' E


2
. What would be the time of the following cities if the time at Prime Meridian is 10 m.

Delhi, London, Tokyo, Paris, Cairo, Moscow

Answer:

Delhi

3:30 p.m.

London

11:00 a.m.

Tokyo

7:00 p.m.

Paris

12:00 Noon

Cairo

12:00 Noon

Moscow

1:00 p.m.

 

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