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Why we cant live on other planets

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Introduction

Unit 11 Task 3 – Jack Davies     Tectonic plates

Tectonic plates are enormous pieces of rock the make the foundation of the earths crust, these plates are often the cause to earthquakes. There consists of around ten main plates and several not so common plates. An average plate is 100km think, the tectonic plates move slowly this is called a tectonic drift this is because the plates slowly re-circulate. Tectonic plates can meet forming mountains, an example of which is Mount Everest. The tectonic plates have created fantastic scenery around the world.

The image below shows the main ten tectonic plate of the world:

image10.png

As the edges of these plates move against one and other the Cause Mountains, volcanoes and earthquakes. Sudden movements of the tectonic plates are of which cause the more dangerous ones. This is because of the sudden jerk caused between them.

Primary Plate:

  • African Plate
  • Antarctic Plate
  • Eurasian Plate
  • Indo-Australian Plate
  • North American Plate
  • Pacific Plate
  • South American Plate

Secondary Plates:

  • Arabian Plate
  • Caribbean Plate
  • Cocos Plate
  • Juan de Fuca Plate
  • Nazca Plate
  • Philippine Sea Plate
  • Scotia Plate
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Middle

image08.pngimage06.pngimage07.pngimage04.pngimage05.png

The crust is a very thin layer made from the plate tectonics around the Earth, its equivalent in deepness from Liverpool to Manchester around 70km deep. The Mantle of Earth is chemically divided into layers, between the mantle and the crust it is viscous (a thick liquid). Earths mantle is a rocky surface and consists of 84 percent of the planets volume. The inner core of Earth is a solid layer that has a average temperature of around 5500 degrees Celsius. Scientists believe that the inner core consists of iron nickel. Because the Earths inner core is not structured with Earths mantle, it has a possibility that it moves freely. The growth of the inner core is believed to be a vital part of the Earths magnetic field.

The Earths plate are made from broken parts of the earths crust because of the heat inside that rise and then fall, this creates convection currents which causes the plates to move. When the plates move towards the earths crust the plates will move

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Conclusion

This can be seen through the diagrams below:

image09.pngimage12.png

Then the continental plates begins to push upwards against each other FOLD MOUNTAINS can be formed through this process, mountains of which can be of a great size. When two continental plats push are forced against each other this is called folding. Fold mountains are parts of the earths crust which are forced together through compressional forces, the crust will become bent as the plates are then uplifted and forced together to form Mountains.

An earthquake caused through the plate tectonics can occur mainly were the plate boundaries are as stated, all forms of movement from the plates such as diverging, converging and transforming. This is caused through a sudden release of energy form the earths crust or mantle. Because of the friction between both plates the effects and vibrations are can be very strong and dangerous. This is called seismic waves which the vibrations of these can be measured through the magnitude of the waves.  

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