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Earth- Components and Structure

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Neil Tia

on 28 February 2011

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Transcript of Earth- Components and Structure

Components and Structure of the Earth How many spheres are present on our Earth?
Biosphere The hydrosphere is the water component of earth which cover about 2/3 of the planet. The Hydrosphere is distributed all over the planet in all three forms of vapour, liquid and solid. The atmosphere is the sphere which has all the air present. High above the planet, the atmosphere becomes thinner until it gradually reaches space. It is divided into five layers. Most of the weather and clouds are found in the first layer. The atmosphere is an important part of what makes Earth. The lithosphere is the crust, the upper layer of the Earth.The tectonic plates are made up of Earth’s crust and the upper part of the mantle layer underneath. Together the crust and upper mantle are called the lithosphere and they extend about 80 km deep. The lithosphere is broken into giant plates that fit around the globe like puzzle pieces. The biosphere is the biological component of earth systems, which also include the lithosphere, hydrosphere, atmosphere and other "spheres". The biosphere includes all living organisms on earth, together with the dead organic matter produced by them, example - birds, animals, reptiles , insects , plants and humans. How do the spheres interact?
The spheres interact in varies ways which may have different outcomes depending how the interaction has taken place. There are natural interactions and human interactions between the spheres. Natural interactions can be as simple as birds flying through the atmosphere and being showered by water or cows eating grass and then wanting to go go drink water. These interactions can have a negative effect which we recognise as natural disasters this can be from either human interference too. These can show in such disasters such as bushfires where fire as destroyed the biosphere(plant) and lithosphere of the particular evironment, droughts- lack of water destroying the biosphere and lithosphere. Everyday interactions within the spheres can the hydrologic cycle which uses water as its medium and circulated throughout each sphere where ever it is needed. Without interactions taking place on our Earth life would be impossible thus it is important to understand and respect how our Earth is. Did you know?
Planet Earth is the only planet whose name has not been derived from the Roman or Greek mythology? The name has originated from the 8th century Anglo Saxon word- Erda. This means ground or soil. Thankyou for watching..=) By neil
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