std 8 geography chapter 1 exercise question answer|std 8 geography ch1 local time and standard time
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geography lesson no 1 std 8 question answer
Complete the sentence by selecting the
correct option:
(a) The earth requires 24 hours for one
rotation. In one hour,
(i) 5 longitudes will face the sun
(ii) 10 longitudes will face the sun
(iii) 15 longitudes will face the sun
(iv) 20 longitudes will face the sun
(b) To calculate the difference between the
local times of any two places on the
earth,
(i) the noon time at both the places
should be known
Exercises
(ii) the difference in degrees of their
longitudes should be known
(iii) the difference in standard times of
both the places should be known
(i)
(iv) Changes need to be made
according to International
Date Line
(c) The differene between the local
time of any two consecutive
longitudes is
(i) 15 minutes
(ii) 04 minutes
(iii) 30 minutes
(iv) 60 minutes
Q2. Give geographical reasons:
(iii)
(a) The local time is decided by the noon
time.
(b) The local time at Greenwich is
considered to be the international
standard time.
Q3. Answer in brief:
(c) The standard time of India has been
decided by the local time at 82.5° E
longitude.
(d) Canada has 6 different standard times.
(a) If it is 12 noon at 60°E longitude, then
explain what would be the time at
30° W longitude?
(b) How is the standard time of a place
determined?
Q4. If it is 10 pm on 21st June at Prime
Meridian, write the dates and time at A, B
and C in the table.
c)
Place
A
(b)
B
*** 23
A football match being played at Sao
Paulo, Brazil started in India at 6 am
IST. Explain what would be the local
time at Sao Paulo?
Longitude
120⁰ E
160⁰ W
C
Q 5. Write the situations of place A shown in
these diagrams in the boxes below them:
(i) Sunrise (ii) midnight (iii) noon (iv) Sunset
60° E
*[*]
Date Time
(iv)
*[*]
Activity:
(a) Look for the actual granny's clock in Shri
Acharya Atre's poem: "Aajiche Ghadyal" (
granny's clock). Look for this poem on the in-
ternet or in reference books.
Find out the velocity of the earth's rotation in
km/hour.
GH6HVM
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