Chapter 7 International Date Line Solutions

Maharashtra State Board Class 9 Geography Solutions Chapter 7 International Date Line

Class 9 Geography Chapter 7 International Date Line Textbook Questions and Answers

1. Two boxes in different hemispheres are given in the following diagram. The IDL passes through both the boxes. In one box, the meridian, day and date is given. Find the day and date for the other box.

Answer:

2. Select the correct option :

Class 9 Geography Chapter 7 International Date Line Question 1.
While crossing the IDL, a person will have to add one day when traveling from
(a) East to West
(b) West to East
(c) South to North
(d) North to South
Answer:
(a) East to West

International Date Line Class 9 Question 2.
If it is Wednesday 10 a.m. at 150 E meridian, then what will be the time at IDL?
(a) Wednesday at 6 a.m.
(b) Wednesday 9 p.m.
(c) Thursday 2 p.m.
(d) Thursday at 6 p.m.
Answer:
(b) Wednesday 9 p.m.

International Date Line Questions And Answers Question 3.
According to the international convention, at which meridian does the day and date change occurs?
(a) 0°
(b) 90° E
(c) 90° W
(d) 180°
Answer:
(d) 180°

International Date Line 9th Std Geography Question 4.
At which direction of the IDL does a new day start immediately?
(a) East
(b) West
(c) North
(d) South
Answer:
(b) West

9 Std Geography International Date Line Question 5.
IDL brings coordination in which of the following?
(a) GPS system
(b) Defence departments
(c) Transportation schedules
(d) Determining the hemisphere
Answer:
(c) Transportation schedules

3. Give geographical reasons

Std 9 Geography Chapter 7 International Date Line Question 1.
IDL is proving to be very useful in today’s times
Answer:
IDL is proving to be very useful in today’s times because:

Class 9th Geography Chapter 7 Question Answer Question 2.
The day starts in the Pacific Ocean on the earth
Answer:

Thus, a new day starts in the Pacific Ocean on Earth.

4. Write in brief:

International Date Line Std 9 Question 1.
What considerations have been made while deciding the IDL?
Answer:
The following points were taken into consideration while drawing the International Date Line. (IDL):

1. The direction of travel
2. The current day and date

5. Using an atlas, tell in which of the following routes the IDL will be crossed and show them on the map.

(1) Mumbai- London- New York- Los Angeles- Tokyo
(2) Delhi- Kolkata- Singapore- Melbourne
(3) Kolkata- Hong Kong- Tokyo- San Francisco
(4) Chennai-Singapore- Tokyo- Sydney-Santiago
(5) Delhi-London-New York

Answer:
(1) Mumbai – London – New York – Los Angeles – Tokyo – IDL will be crossed.
(2) Delhi – Kolkata – Singapore – Melbourne – IDL will not be crossed
(3) Kolkata – Hong Kong – Tokyo – San Fransico – IDL will be crossed.
(4) Chennai – Singapore – Tokyo – Sydney – Santiago – IDL will be crossed
(5) Delhi – London – New York – IDL will not be crossed.

Class 9 Geography Chapter 7 International Date Line Intext Questions and Answers

Use your Brain Power:

Examine a ticket of UA 876 Boeing 787-9 Dreamliner closely and find the answers to the following questions:

Try this:

(ii) When Minal reached 180° meridian i.e. IDL, according to her it is Wednesday midnight (24.00). When IDL is crossed from east to west we need to add a day (24 hrs.). Thus when 24 hrs are added to Wednesday 24.00 (midnight) we get Thursday 24.00 (midnight). So after crossing the IDL the day to be considered is Thursday.

Give it a try:

Your are now aware of the changes required to be made while crossing the ¡DL. Now redo the activity given on Page 59. Tell us the changes that you will have to make while crossing the IDL i.e. 1800 meridian. Your travel will start on Sunday, 21st May 2016 at 10 a.m.

Let’s Recall:

Class 9 Geography Chapter 7 International Date Line Additional Important Questions and Answers

Complete the Statements choosing correct option:

Answer in one sentence:

The following table shows the days and time to welcome New Year in different countries and cities according to 1ST. Observe the table and answer the questions gives below: