The largest portion of the Earth is its mantle. It measures over 2,900 kilometres thick. Magma, a type of semi-molten rock, makes up the majority of the mantle. Lower in the mantle, the rock is softer and starts to melt. Up top, the rock is firm.
The Sima is directly beneath the mantle. Rock that is extremely heated and thick makes up the mantle. Under pressure, this layer of rock flows like asphalt. The biggest temperature variations between the mantle's bottom and top are what create this flow. The mantle's mobility is what causes the Earth's plates to jolt. From 1600 oF in the higher half to 4000 oF in the bottom, its temperature changes.
Where we live, the crust is the topmost layer. The thickness ranges from 0 to 60 kilometres. There are two different types of this solid rock layer:
- Continental crust covers the land and,
- Oceanic crust covers water
The crust has been examined and understood the most. The mantle has a higher temperature and can flow. If you were to travel to the centre of the Earth, the outer and inner cores would be significantly hotter and under much greater pressure, which could be contained in a marble-sized ball.
What is the Distance Between the Earth and the Sun in Km?
Therefore, 150 million kilometres or such is roughly how far the Earth is from the Sun. The apparent distance between Earth and the Sun gradually changes during the course of the year.
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