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Hazardous Earth (Plate boundaries (constructive plate boundaries
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Hazardous Earth
Plate boundaries
constructive plate boundaries
The oceanic crust is pulled apart by the rising magma.
Volcanoes are formed as magma wells up to fill the gap, and eventually new crust is formed.
destructive plate boundaries
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 (volcanoes).
conservative plate boundaries Plates slide past each other. Friction is eventually overcome and the plates slip past in a sudden movement. The shockwaves created produce an earthquake.
collision plate boundaries
Collision zones form when two continental plates collide. Neither plate is forced under the other, and so both are forced up and form fold mountains.
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Urbanisation
Densely populated areas are at great risk from natural events such as earthquakes and tropical cyclones. 2010 Haiti Earthquake destroyed much of the capital of Port Au Prince
Poverty
People living in poverty may live in poor housing conditions. For example in Peru, a shortage of housing has led to people building on unstable slopes prone to flooding and landslides.
Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur.
Climate Change (rising sea levels, more frequent droughts etc
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