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Ask QuestionPosted by Vishwajeet. M 5 years, 8 months ago
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Posted by Technical Dc 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
The atmosphere is composed of a number of gases, water vapour and dust particles. Nitrogen and Oxygen are two main gases, which form over 99% of the total volume of the atmosphere. The other gases are argon, carbon dioxide, neon, helium ozone hydrogen, methane, etc. The following chart gives percentage of permanent gases in the atmosphere:
Water vapour is the most important element of the atmosphere. The average amount of water vapour is nearly 2% of the atmosphere by volume, it may-vary from 4% in the worm and wet tropics to less than 1% in dry and cold areas of deserts and the polar regions.
Dust particles comprise the third major component of the atmosphere. They are derived from different sources and include: sea salts, smoke-soot, fine soil, ash, pollen, dust, etc.
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Yogita Ingle 5 years, 8 months ago
| Waves | Tides | Currents |
| Formed due to the forces exerted by winds on the water surface | Formed due to the interaction of gravitational forces between the Earth, Sun and Moon | Formed as a result of temperature differences on oceanic surfaces |
| Waves are defined as the energy that moves across the surface of the water | Tides are defined as the rise and fall of the sea level | 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 tides are influenced by the location and position of the Earth | The intensity of currents are influenced by winds, temperature differences in water and the oceanic surface topography |
| Waves occur regularly across bodies of water | Tides occur twice a day | Equatorial currents like El Nino occur every few years |
| Waves move from side to side | Tides move up and down | 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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Sia ? 5 years, 4 months ago
A glacier is a huge mass of ice that moves slowly over land. The term “glacier” comes from the French word glace (glah-SAY), which means ice.
- Mountain glaciers
- Valley glaciers.
- Tidewater glaciers.
- Piedmont glaciers
- Hanging glaciers.
- Cirque glaciers.
- Ice Aprons.
- Rock Glaciers.
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Yogita Ingle 5 years, 8 months ago
Dew: When the moisture is deposited in the form of water droplets on cooler surfaces of solid objects such as stones, grass blades and plant leaves, it is known as dew. The ideal conditions for its formation are clear sky and calm air, high relative humidity and cold and long nights. It is also necessary that the dew point is above freezing point.
Frost: When the dew point is below freezing point the water vapour will accumulate on the earth’s surface in the form of small white ice particles. The formation of the ice particles over a large area is called frost. The frost is formed when the temperature of the air falls rapidly so that the water vapour present in the air is directly turned into solid particles without turning into liquid state.
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Yogita Ingle 5 years, 8 months ago
The average temperature of the earth remains rather constant. It has been possible because whatever the amount of heat the earth receives from the sun in the form of short-waves, it radiates back to the atmosphere in the form of long waves. There exists a stage of heat balance or equilibrium between the earth and its atmosphere. This balance of heat is termed as the earth's heat budget.
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Yogita Ingle 5 years, 8 months ago
It is one form of soil degradation. Soil erosion occurs in almost all types of lands. Flowing water, rainwater, and the wind are the prime agents which cause a significant amount of soil loss each year. Too much of soil erosion causes serious loss of topsoil and also reduces crop production potential, lower surface water quality, and damaged drainage networks.
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