have remained the regions of high population
concentration. Even though the uses of natural resources such as land and water
in these regions have shown the sign of degradation, the con centration of
population remains high because of an early history of human settlement and
development of transport network. On the other hand, the urban regions of
Delhi, Mumbai, Kolkata Bangalore, Pune.'Ahmadabad, Chennai, more...
Figure 3.1 Latitudes
Longitudes
The longitudes are divided into two parts by prime meridian (denoted by 0° longitude) eastern and western. It passes through Greenwich near London. The earth is divided from 0° to 360° longitudes. All longitudes meet at the morthern and southern poles. Longitudes join at all the places of that particular longitude. The longitude 180 is international Date Line. Witch is not a straight line, and It Is deliberately drawn in a zig-zag manner to save the country form partition, which passes through pacitic ocean. The date of the western part of countries of this line is aheadof the eastern part of contries. This is the reason for a person who travels from east to west will
loseone day; while a person who travels from west to east will gain one day. The value of one longitude is 4 min; therefore, towards east, the time increases, and towards west, it decreases.
MOTIONS OF THE EARTH
Earth has two motions: one on its axis and the other around the sun. The first motion on its axis is called daily rotation, while the second one around the sun is called yearly motion. Because of the motion on its axis. Earth rotates from west to east; further, it takes 24 h to complete the rotation, and therefore, there are more... | Constituent Percentage by volume | |
| Nitrogen | 78.08 |
| Oxygen | 20.95 |
| Argon | more...
Air
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