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Pratical Work In Geography Chapter 3 Latitude, Longitude And Time

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NCERT Solution For Class 11 Geography Pratical Work In Geography

Latitude, Longitude And Time Here is the CBSE Geography Chapter 3 for Class 11 students. Summary and detailed explanation of the lesson, including the definitions of difficult words. All of the exercises and questions and answers from the lesson's back end have been completed. NCERT Solutions for Class 11 Geography Latitude, Longitude And Time Chapter 3 NCERT Solutions for Class 11 Geography Latitude, Longitude And Time Chapter 3 The following is a summary in Hindi and English for the academic year 2021-2022. You can save these solutions to your computer or use the Class 11 Geography.

Question 1

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What are parallels of latitude ?

Solution

Parallels of Latitude : The parallels of latitude refer to the angular distance in degrees, minutes and seconds of a point north or south of the Equator. Lines of latitude are often referred to as parallels.

Question 2

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What are the meridians of longitude ?

Solution

Meridians of Longitude : The meridians of longitude refer to the angular distance, in degrees, minutes and seconds of a point east or west of the Prime (Greenwich) Meridian. Lines of longitude are often referred to as meridians.

Question 3

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Which are the two natural points of reference on the earth ?

Solution

North Pole and South Pole.

Question 4

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What is the great circle ?

Solution

Equator is the great circle.

Question 5

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What are coordinates ?

Solution

Latitudes and longitudes are the coordinates.

Question 6

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

Solution

The sun appears to be moving from east to west because the earth rotates from west to east.

Question 7

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What is meant by local time ?

Solution

The simple old way of determining time was adjust the clock at noon when the sun would cross the local meridian and the shadows would be at their shortest. Time calculated by position of the sun at noon of a given place is called local time.

Question 8

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Explain standard time.

Solution

1. In order to maintain uniformity of time as far as possible within the territorial limits of a country, the time at central meridian of the country is taken as the standard meridian and its local time is taken as the standard time for the whole country.
2. The standard meridian is selected in a manner that it is divisible by 15° or by 7°.30’ so that the difference between its standard time and Greenwich mean time may be expressed as multiples of an hour or half an hour.

Question 9

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Distinguish between latitudes and longitudes.

Solution

Latitudes :
1. The imaginary lines running east-west are known as parallels of latitude.

2. These are circular and make a complete circle.

3. They run parallels each other and to the equator.

4. All the parallels get smaller in size to their distances from the equator towards the poles.

Longitudes :
1. The vertical lines running north-south join the two poles are called meridians of longitude.

2. They are halves of the great circle.

3. They all meet at poles.

4. They are not parallel.

Question 10

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Distinguish between local time and standard time.

Solution

Local time :
1. Local time of a place is the time of its meridian.

2. Each place has its own local time.

3. When it is noon the local time is 12 O'clock.

4. All places on a meridian has same local time.

5. The place in the east are ahead of west in time. For 1° longitude there is a difference of 4 minutes.
Standard time :
1. Standard time is the time of central meridian of an area.

2. All places have a uniform time.

3. It has no relation with moon or height of the sun.

4. All places in same region have the same standard time.

5. There is no change in time. So it is known as standard time.

Question 11

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The local time at New York (75° W) is 8.30 P.M. on Wednesday. What will be time at Delhi (77°E) ?

Solution

New York Greenwich New Delhi

75°W 0 77°E

Time – 8.30 P.M. Wednesday East-Gain-Add

Longitude of New York = 75°W

Longitude of New Delhi = 77°E

Difference in the longitude = 152°

Difference in time = 152 x 4

Question 12

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Find out the locations of the following places with the help of your atlas and write their latitudes and longitudes

Place

Latitude

Longitude

(i) Mumbai

(ii) Vladivostok

(iii) Cairo

(iv) New York

(v) Ottawa

(vi) Geneva

(vii) Johannesburg

(viii) Sydney

Solution

Place

Latitudes

Longitudes

(i) Mumbai

(ii) Vladivostok

(iii) Cairo

(iv) New York

(v) Ottawa

(vi) Geneva

(vii) Johannesburg

(viii) Sydney

19° N

42° N

30° N

41° N

45° N

44° N

24° S

34° N

73° E

131° E

30° E

75° W

75° W

9° E

29° E

151° E

Question 13

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What would be the time of the following cities if the time at Prime Meridian is 10 A.M.

(i) Delhi, (ii) London, (iii) Tokyo, (iv) Paris, (v) Cairo, (vi). Mosco.

Solution

Place

Time

(i) Delhi

(ii) London

(iii) Tokyo

(iv) Paris

(v) Cairo

(vi) Moscow

3.18 P.M.

10.00 A.M.

7.33 P.M.

9.54 A.M.

12 Noon

12.06 P.M.

= 608 minutes = 10 hr. 8 min

So the time at New Delhi will be

Local time of New York = 8 : 30 P.M. = 10 : 08 = 18 : 38 P.M. = 6 . 38 P.M.

Question 14

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Define the parallels of latitude.

Solution

Parallels of Latitude : The parallels of latitude refer to the angular distance in degrees, minutes and seconds of a point north or south of the Equator. Lines of latitude are often referred to as parallels.

Question 15

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What is the standard time ?

Solution

In order to maintain uniformity of time as far as possible within the territorial limits of a country, the time at the central meridian of
the country is taken as the Standard Meridian and its local time is taken
as the standard time for the whole country.

Question 16

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What is the local time ?

Solution

The simple old way of determining time was adjust the clock at noon when the sun would cross the local meridian and the shadows would be at their shortest. Time calculated by position of the sun at noon of a given place is called local time.

Question 17

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What is GMT ?

Solution

Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London, which later became adopted as a global time standard.

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