| ANTIPODES |
A region or place on the opposite side of a point on the earth. |
| ANTICYCLONES |
Winds which blow outward from the center. |
| APHELION |
Position of the earth in its orbit when is at the maximum distance
from the sun. |
| ARCHIPELAGO |
A cluster of islands, e.g., Pearl Islands in the Gulf of Panama. |
| ATOLL |
Coral reef resembling a horse shoe, enclosing a lagoon. |
| AXIS |
An imaginary line joining north and south poles. |
| AVALANCHE |
A vast mass of snow mixed with earth or stones. |
| BIOSPHERE |
Animate or inanimate organic kingdom on earth. |
| CANYON |
A deep valley cut by a river through a mountain region, e,g., the Grand
Canyon of the Colarado river in the USA. |
| CONTINENTAL SHELF |
Land adjoining a continent submerged in the sea. |
| CYCLONES |
A low pressure system area in which the wind blows spirally inward. |
| CROP ROTATION |
Growing different crops needing different minerals for their growth
in the same piece of land in order to get more yield. |
| DATE LINE |
An imaginary line pointing north-south approximating to the Meridian
180 (east or west) where the date changes by one day the moment it is crossed. |
| DELTA |
Alluvial deposit shaped like Greek letter, formed at the mouth of the
river, where it falls into the sea, e.g., the Sunderban delta. |
| DEW |
Condensed atmospheric water vapours due to the cooling of the air. |
| DRY FARMING |
Growing of crops in low rainfall areas by moisture conservation, crop
rotation but without irrigation. |
| EQUATOR |
An imaginary line dividing the earth into two equal parts. |
| EQUINOXES |
The day on which nights and days are of equal duration, e.g., March
22 and September 23. |
| EROSION |
Wearing away of the earth's land surface by rain, wind, water, etc.
rendering the land infertile. |
| ECLIPSE |
When one earthly body obscures another one partially or completely. |
| FOG |
When the atmospheric moisture touches cold earth and condenses on dust
particles. |
| FROST |
When the atmospheric moisture deposits in the shape of icy flakes on
the exposed objects or near the ground due to below freezing point temperature. |
| HIGH SEAS |
The parts of the sea which do not come under the territorial jurisdiction
of the nations. |
| ICEBERG |
Huge mass of ice separated from glacier in the polar regions. These
masses of ice float in the oceans with 9 parts submerged in the ocean and
one part visible. |
| ISOBARS |
Lines on the map connecting the places of the same pressure. |
| ISOTHERMS |
Lines on the map joining the places of the same temperature. |
| ISTHMUS |
Narrow neck of land joining two land areas. |
| KUNDAN |
Anew variety of wheat which gives high yields in both rained and irrigated
tracts and responds well to low dose of water and fertiliser. |
| LAGOON |
A shallow stream of water at the mouth of a river enclosed bu dunes
of river silt. |
| LIGHT YEAR |
The distance traveled by light in one year. It is equal to 9.4*10612
km. |
| LOCAL TIME |
Time calculated from the sun at noon at any place of earth. |
| MERIDIAN |
Imaginary line joining north and south poles and cutting the equator
at right angles. |
| MIST |
It is just like fog but contain more moisture. |
| OASIS |
A part of the desert where water and vegetation are found. |
| ORBIT |
The path of the heavenly bodies. |
| PYGMALLION POINT |
The southernmost point of India, 700 km away from mainland India. |
| PRAIRIES |
Smooth, treeless, green plain of Central and North America. |
| REEF |
Jutting of rock or shingle or sand at just above or below sea level. |
| SAVANNA |
Land covered with natural grass. |
| SIDEREAL DAY |
Time taken by the earth to rotate once round its axis. |
| SNOW LINE |
Altitudinal line along which the area remains snow clad. |
| SPRING TIDES |
Higher tides in the ocean caused by the sun and the moon together. When the sun, the earth and the moon are positioned in a straight line. |
| NEAP TIDES |
Tides caused by the differences of the forces exerted by the moon and
the sun when both are at right angles to each other. |
| TORNADO |
A brisk and violent storm generally having rotator motion. |
| TUNDRAS |
Peripheral area of Arctic ocean. |
| TYCOON |
Violent hurricane in China Sea. |
| WEATHER SATELLITE |
Artificial satellite designed to forecast weather. |
| WESTERLIES |
Constant winds blowing from south-west in the northern hemisphere and
north-west in south hemisphere. |
