Earth Crust

 

Earth Crust




What lies within the Earth?




The Earth gets hotter and hotter. The temperature reaches, 70000C hotter than of the surface of the sun. Thus, just beneath the crust is the layer of half-molten rocks thousands of kilometers deep called the mantle. Within the earth center is the core. The outer core is made of molten iron and nickel. In the inner core, the Pressure is intense, therefore, despite being so hot, it is solid.

Can anyone visit the Earth's center?

It is not possible. No one has ever managed to drill more than 12 km down. Even at this depth, pleasure, are so great and the rock is so hot and soft that the drill bores close up as fast as they are drilled.

What is the composition of the mantle?




The mantle is made of rock like the crust. But the most common minerals here are minerals that are rare on the surface, like perovskite and olivine.

How do scientists hear the Earth's interior?




The vibrations of the earthquakes help us in that. Long after the ground stops shaking, the reverberations from the earthquakes shudder through the Earth. Sensitive defectors pick them on the far side of the world. Scientists ‘hear' the Earth's interior from the pattern of earthquake waves.

What is the size of the Earth's crust?



The Earth's crust is surprisingly thin. If is between 0-60 km thick. Comparatively, it is thickest beneath the continents. But, even here, it is no more than 70 km thick at the most. If is thinnest beneath the oceans, often less than 8 km thick.

What is Mohorovicic discontinuity?



The Earth's crust and the mantle is divided by a boundary called the Mohorovicic discontinuity.

Which plates are found in the Earth's crust?




The Earth's crust is broken into giant plates called tectonic plates.

 

What is the temperature inside the Earth?




In the lithosphere, the temperature climbs 35°C every 1,000 m you go down. In the mantle, temperatures climb to 3,000°C. The core reaches 7,000°C.

What is lithosphere?




It is the outer part of the Earth. It includes the crust and the Upper mantle.

 

Crack in the Earth




The Earth's surface is cracked in many places. One of the biggest cracks is under the middle of the oceans. Here, the tectonic plates are pulling apart. As they do, molten rock from the mantle oozes up, cools and solidifies, forming a long ridge of rock.

 



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#Earth Crust          #What lies within the Earth?         #Can anyone visit the Earth's center?           #What is the composition of the mantle?            #How do scientists hear the Earth's interior?            #What is the size of the Earth's crust?            #What is Mohorovicic discontinuity?          #Which plates are found in the Earth's crust?           #What is the temperature inside the Earth?           #What is lithosphere?           #Crack in the Earth

 

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