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Yogita Ingle 4 years, 7 months ago
Geography is divided into two main branches: human geography and physical geography. There are additional branches in geography such as regional geography, cartography, and integrated geography.
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Yogita Ingle 4 years, 8 months ago
- The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide.
- Movement of water caused by meteorological effects (winds and atmospheric pressure changes) are called surges.
- Surges are not regular like tides.
- The ‘tide-generating’ force is the difference between these two forces; i.e. the gravitational attraction of the moon and the centrifugal force.
- On the surface of the earth, the horizontal tide generating forces are more important than the vertical forces in generating the tidal bulges.
- The tidal bulges on wide continental shelves, have greater height. When tidal bulges hit the mid- oceanic islands they become low.
- The shape of bays and estuaries along a coastline can also magnify the intensity of tides. Funnel-shaped bays greatly change tidal magnitudes. When the tide is channeled between islands or into bays and estuaries they are called tidal currents.
Posted by Rajendra Bhatia 4 years, 8 months ago
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Yogita Ingle 4 years, 8 months ago
Tides based on Frequency
Semi-diurnal tide : The most common tidal pattern, featuring two high tides and two low tides each day. The successive high or low tides are approximately of the same height.
Diurnal tide : There is only one high tide and one low tide during each day. The successive high and low tides are approximately of the same height.
Mixed tide: Tides having variations in height are known as mixed tides. These tides generally occur along the west coast of North America and on many islands of the Pacific Ocean.
Tides based on the Sun, Moon and the Earth Positions The height of rising water (high tide) varies appreciably depending upon the position of sun and moon with respect to the earth. Spring tides and neap tides come under this category.
Spring tides: The position of both the sun and the moon in relation to the earth has direct bearing on tide height. When the sun, the moon and the earth are in a straight line, the height of the tide will be higher. These are called spring tides and they occur twice a month, one on full moon period and another during new moon period.
Posted by Sahil Harsh 4 years, 8 months ago
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Yogita Ingle 4 years, 8 months ago
Mount Everest is the highest peak in the world. It rises to a height of 8,850m (29,035) above sea level. It is one of the mountains in the Himalayan range.
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Yogita Ingle 4 years, 8 months ago
|
Spring Tides |
Neap Tides |
|
Spring tides are the result of the moon and sun working together to exert more pull on the earth's oceans. |
Neap tides are the result of the moon and sun working against each other's pull. |
|
In Spring tide , the difference between high and low tide is the greatest. |
In Neap tide , the difference between high and low tide is the least. |
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Sia ? 3 years, 5 months ago
| Waves | Currents |
| Formed due to the forces exerted by winds on the water surface | Formed as a result of temperature differences on oceanic surfaces |
| Waves are defined as the energy that moves across the surface of the water | Currents are defined as the direction of flow of a body of water |
| The intensity of waves are influenced by wind factors | The intensity of currents are influenced by winds, temperature differences in water and the oceanic surface topography |
| Waves occur regularly across bodies of water | Equatorial currents like El Nino occur every few years |
| Waves move from side to side | Currents flow clockwise in the Northern Hemisphere and counter clockwise in the Southern Hemisphere. This is known as the Coriolis Effect. |
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Yogita Ingle 4 years, 8 months ago
According to thermodynamic systems, heat transfer is defined as
The movement of heat across the border of the system due to a difference in temperature between the system and its surroundings.
Interestingly, the difference in temperature is said to be a ‘potential’ that causes the transfer of heat from one point to another. Besides, heat is also known as flux.
Posted by Bodong Debbarma 3 years, 5 months ago
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Sia ? 3 years, 5 months ago
| The Himalayan rivers | The Peninsular rivers |
| These rivers are perennial that is they have water throughout the year. | These rivers are seasonal. |
| These rivers obtain water from rain as well as from melted snow from high mountains. | The flow of these rivers is based on rainfall. |
| These rivers have large river basin | These rivers have a smaller basin as compared with the Himalayan rivers |
| The rivers are mainly running in their youth stage | These rivers are considered as old rivers |
| Two major Himalayan rivers, the Indus and the Brahmaputra originate from the north of the mountain ranges. | Most rivers of peninsular region originate in the Western Ghats and flow towards the Bay of Bengal. Godavari and Narmada are the main river system of peninsular rivers. |
| The main source is from glaciers of the Himalayan mountain range | The main source of the river is the peninsular plateau and the central highland |
| The Himalayan rivers have long duration courses from their source to the sea. | These rivers have shorter and shallower courses as compared to Himalayan rivers. |
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Sia ? 3 years, 5 months ago
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