NCERT MOST IMPORTANT QUESTIONS CLASS – 11 | GEOGRAPHY | GEOGRAPHY- PRACTICAL WORK IN GEOGRAPHY | CHAPTER- 3 | LATITUDE, LONGITUDE AND TIME | EDUGROWN |

In This Post we are  providing  CHAPTER 3 LATITUDE, LONGITUDE AND TIME NCERT MOST IMPORTANT QUESTION for Class 11 GEOGRAPHY which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These   can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MOST IMPORTANT QUESTION ON LATITUDE, LONGITUDE AND TIME

Question 1.
How can we determine latitude of a place?
Answer:
Latitude of a place may be determined with the help of the altitude of the sun or the Pole Star.

Question 2.
What is 1ST?
Answer:
The Indian Standard Time is calculated from 82°30’E meridian passing through Mirzapur. 1ST is plus 5.30 hours from the GMT ((82°30’ x 4) (330 minutes = 5 hours 30 minutes).

Question 3.
Which countries have more than one time zone?
Answer:
The countries with large east-west span may choose more than one standard meridian to get more than one time zone such as Russia, Canada and the United States of America.

Question 4.
When it is 12:00 noon in Greenwich then what will be the time at Thimbu, capital of Bhutan which is located at 90° east?
Answer:

At one degree time changes by 4 minutes Difference between Greenwich and Thimbu is equal to 90°
Therefore time difference = 90 x 4
= 360 minutes = 6 hours (360/60)

Question 5.
When it is 12:00 noon in Greenwich then what will be the time at New Orleans which is located at 90° west?
Answer:
At one degree time changes by 4 minutes Difference between Greenwich and New Orleans is equal to 90°
Therefore time difference = 90 x 4
= 360 minutes = 6 hours (360/60)
Since it is towards, west, time will decrease by 4 minutes on each longitude. Therefore, it will be 6 am in the morning.

Question 6.
When it is 12:00 noon in Greenwich then what will be the time at New York which is located at 74° west?
Answer:
At one degree time changes by 4 minutes Difference between Greenwich and New York is equal to 74°
Therefore time difference
= 74 x 4
= 296 minutes
= 4 hours 56 minutes (296/60)
Since it is towards, west, time will decrease by 4 minutes on each longitude.
Therefore, it will be 7:04 am in the morning.

Question 7.
What is International Date Line? What
is its importance?
Answer:
The world is divided into 24 time zones, there has to be a place where there is a difference in days, somewhere the day truly “starts” on the planet. The 180° line of longitude is approximately where the International Date Line passes. The time at this longitude is exactly 12 hours from the 0° longitude, irrespective of one travels westward or eastward from the Prime Meridian. Time decreases east of the Prime Meridian and increases to its west. Hence, for a person moving east of the Prime Meridian, the time would be 12 hours less than the time at 0° longitude. For another person moving westward, the time would be 12 hours more than the Prime Meridian. For example, a person moving eastward on Tuesday will count the day as Wednesday once [ the International Date Line is crossed.
Similarly, another person starting his journey on the same day, but moving westward will count the day as Monday after crossing the line.

Question 8.
Explain the relationship between r longitude and time,
Answer:
The earth rotates from west to east over its axis. It makes the sun rise in the east and set in the west. The rotation of
the earth over its axis takes 24 hours to complete one circle or 360° of longitudes. As 180° of longitudes fall both east and west of the Prime Meridian, the sun, thus takes 12 hours’ time to traverse the eastern and western hemispheres. In other words, the sun traverses 15° of longitudes per hour or one degree of longitude in every four minutes of time. The time decreases when we move from west to east and increases with our westward movement. The rate of the time at which the sun traverses over certain degrees of longitudes is used to determine the local time of an area with respect to the time at the Prime Meridian (0°Longitude). For example when it is 2 pm in Greenwich, it will be 3 pm in 15° east. (15×4 = 60 minutes = 1 hour).

Question 9.
Explain the process or drawing latitudes.
Answer:
Process of drawing latitudes:

• Draw a circle.
• Divide it into two equal halves by drawing a horizontal line in the centre. This represents the equator.
• Place a protractor on this circle in a way that 0° and 180° line on the protractor coincide with the equator on the paper.
• Now to draw 20°S, mark two points at an angle of 20° from the equator, east and west in the lower half of the circle.
• The arms of the angle cut the circle at two points. Join these two points by a line parallel to the equator. It will be 20°S.
  

Question 10.
Explain the process of drawing longitudes Ans. Process of drawing longitudes:
Answer:

• Draw a circle whose centre represents the North Pole. The circumference will represent the equator.
• Draw a vertical line through the centre of the circle, i.e. crossing the North Pole. This represents the 0° and 180° meridians, which meet at the North Pole as shown in figure given below:
  
• To draw a longitude, imagine that you are on the North Pole, i.e. at the centre of the circle as shown in Figure given above.
• Observe now that the relative directions of east and west would reverse in this case and east would be towards your left while west would be towards your right.
• Now, draw 45° E and W as shown in Figure given below:
  
• For this, place your protractor along the vertical line, coinciding with the 0° and 180° meridians and then measure 45° on both the sides, which will denote 45° . E meridian and 45° W meridian on your left and right, respectively.
• The diagram will represent the appearance of the earth if we look at it from directly above the North Pole.