• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Plate Tectonic

Extracts from this document...

Introduction

Plate Tectonics The Earth's crust is made up of tectonic plates which are constantly moving. Where each of the plates meets another is called a plate boundary. The movement of the plates is caused by convection currents which are made from the heat rising and falling inside the mantle. This heat comes from the Earth's core. Plates do different things at different plate boundaries. Where two plates move apart is called a constructive boundary, where they move towards each other is a constructive boundary and where they just slide past each other is called conservative. ...read more.

Middle

The oceanic crust is young, thin and dense. It is always being destroyed and recreated. The continental crust, however, is old, light and thick. It is permanent and does not sink, unlike the oceanic. Destructive plate margins, those that move together, are usually where oceanic crust meets continental. As oceanic material is slightly denser, it is forced downwards under the continental material. Where this process takes place is called the subduction zone. Constructive plate margins, where the plates are moving apart, act very differently. As the continental regions more apart, new oceanic crust is created to fill the gap. ...read more.

Conclusion

When this pressure is quickly released it travels to the surface of the earth and causes it to shake. This happens at both destructive and constructive plate boundaries because pressure is built up when plates move either together or apart. Similarly, volcanoes occur at both boundaries. They form when molten rock from under the earth's crust is surfaced. This is usually because the plates moving have created a gap or crack for material to be pushed through. At a destructive plate margin, when the plates are pushed together yet one doesn't subduct, material is pushed upwards, this is how the Fold Mountains are formed. The Andes are an example of Fold Mountains formed at a destructive plate margin. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Physical Geography section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Physical Geography essays

  1. Volcanoes at destructive and constructive margins

    These volcanoes may rise above sea level thus forming islands. Two examples of this are the island of Surtsey, and Easter Island. In destructive margins of oceanic and continental plate, the oceanic crust is normally highly filled with rocks rich in iron and magnesium rock, but as it rises through

  2. GCSE Coursework -Plate Tectonics

    Several mountains in the world, including Mount Rainier in the USA, Mount Ruapehu in New Zealand, and Galunggung in Indonesia, are considered particularly dangerous due to the risk of lahars. Several towns in the Puyallup River valley in Washington state, including Orting, the closest to Mount Rainier, are built on

  1. Physical Geography Earth revision notes

    These are important habitats for plants and birds . 1. Accumulation of mud and salt 2. Mud begins to break the surface ? above the water ? mudflows are formed 3. New plates start to colonize (form) Cliff collapse 1. Soft clay cliffs are permeable (soak up water)

  2. Earthquakes and volcanoes research

    Tsunamis An earthquake under a body of water often lifts or collapses the land under the water. This sudden move of a large body of land displaces the water above it, creating a massive wave. The wave is unlike waves you see at the beach, which are caused by wind.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work