writea brief note on the various spheres of the earth
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Earth's Spheres. Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
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mark as brillant
Answer:
Hey mate here's your answer
There are four main spheres of earth. They are-
1. Geosphere
2. Hydrosphere
3. Biosphere
4. Atmosphere
1. THE GEOSPHERE
Since 'geo' means 'ground,' the geosphere describes all of the rocks, minerals and ground that are found on and in Earth. This includes all of the mountains on the surface, as well as all of the liquid rock in the mantle below us and the minerals and metals of the outer and inner cores. The continents, the ocean floor, all of the rocks on the surface, and all of the sand in the deserts are all considered part of the geosphere. Basically, if it looks like solid ground, it's part of the 'ground' sphere.
2. THE HYDROSPHERE
Knowing that 'hydro' means 'water,' you may have guessed that the hydrosphere is made up of all the water on Earth. This includes all of the rivers, lakes, streams, oceans, groundwater, polar ice caps, glaciers and moisture in the air (like rain and snow). The hydrosphere is found on the surface of Earth, but also extends down several miles below, as well as several miles up into the atmosphere.
Most of Earth's water is salty and in the oceans - about 97%. Two-thirds of the remaining 3% is frozen in glaciers and polar ice caps. Only 1% of the hydrosphere is liquid freshwater, and even most of this exists as groundwater down in the soil.
3. THE BIOSPHERE
Biosphere (Living Things)
All the living things in the planet are categorized under the biosphere. In this view, the biosphere includes all of the animals, plants, and microorganisms of earth. Humans as well belong to this group. The entire ecological communities within the physical surrounding of the earth are within the umbrella of living things (biosphere). These ecological communities interact together with the physical aspects of the earth including the hydrosphere, lithosphere, and the atmosphere.
Collectively, these ecological communities are made reference to as biomes. Deserts, forests, grasslands, aquatic, tundra, and chaparral are the six main biomes that are present in the biosphere. The living things on earth interact with each other in various ways, which is well elaborated under the trophic levels of food chain – how energy is transferred in ecological systems.
4. THE ATMOSPHERE
All the air in the atmosphere makes up the atmosphere. The atmosphere is a mixture of nitrogen (about 78%), oxygen (about 21%), and other gasses (about 1%) such as carbon dioxide (0.039%), argon (0.93%) and the rest are trace gases (krypton, neon, helium , and xenon). The higher the atmosphere, the thinner it becomes and this trait gradually moves towards space. The atmosphere extends all the way from the earth’s crust to more than 6200 miles (10,000 kilometers) above the earth’s surface into space. The atmosphere is divided into several layers and amongst the layers is the stratosphere that contains the ozone layer which protects the organisms in the biosphere from the sun’s harmful radiation.
Other layers of the atmosphere include the troposphere, mesosphere, thermosphere, and the exosphere. These atmospheric layers exhibit different chemical compositions and temperatures, and the temperatures and chemical compositions widely vary within the different layers. The troposphere is where most of the weather happens and it becomes colder with altitude. The air is in constant motion around the planet and it is normally responsible for some natural events in the planet such as local breeze, winds, tornado, and tropical cyclones. The atmosphere is always in constant interaction with the hydrosphere, giving rise to the planets weather conditions.
Hope it helps you
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