Active World

Descripción

GCSE Geography Diapositivas sobre Active World, creado por Rishi Serumadar el 23/05/2016.
Rishi Serumadar
Diapositivas por Rishi Serumadar, actualizado hace más de 1 año
Rishi Serumadar
Creado por Rishi Serumadar hace más de 8 años
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Resumen del Recurso

Diapositiva 2

    Structure of the Earth
    The inner core is 5,500°C - extremely hot. It is a very dense solid made from iron and nickel. The outer core is 2,000 km thick and is a liquid. The mantle is semi-molten and about 3,000 km thick. The crust is the outer layer of the earth. It is a thin layer between 0-60 km thick. The crust is the solid rock layer upon which we live.

Diapositiva 3

    Constructive Plate Margins
    A constructive plate boundary occurs when plates move apart. Volcanoes are formed as magma wells up to fill the gap, and eventually new crust is formed.An example of a constructive plate boundary is the mid-Atlantic Ridge.

Diapositiva 4

    Destructive Plate Margin
    A destructive plate boundary occurs when oceanic and continental plates move together. The oceanic plate is forced under the lighter continental plate. Friction causes melting of the oceanic plate and may trigger earthquakes. Magma rises up through cracks and erupts onto the surface.An example of a destructive plate boundary is where the Nazca plate is forced under the South American Plate.

Diapositiva 5

Diapositiva 6

    Conservative Plate Margin
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