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20 Cards in this Set
- Front
- Back
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Constructive Boundary
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Two Plates move apart from each other. EG. African Plate and South American Plate.
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Destructive Boundary
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Two Plates move towards each other, a Oceanic Plate and a Continental Plate EG. The Nazca Plate and The South American Plate
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Conservative Boundary
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Two Plates move along side each other. EG. North American Plate and The Pacific Plate.
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What is formed at a Constructive plate boundary?
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New land
Sheild Volcanoes |
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What is formed at a Destructive plate boundary?
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Deep sea trench
Cone Volcanoes Fold Mountains |
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Continental Crust
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9-35km thick
Less dense than Oceanic Crust Made of Granite |
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Oceanic Crust
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5-10km thick
More dense than Continental Crust Made of Basalt |
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Richter Scale
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Measures the strength of the Earthquake
This is a numerical scale |
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Mercalli Scale
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Measaures the amount of damage
This describes using words |
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Cone Volcano
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Fromed at Destructive plate boundaries, tall and steep.
Formed by acid lava which is thick and sticky and erupts violently |
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Shield Volcano
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Formed at Constructive Plate boundaries, low and gentle slopes, they erupt frequently and gently
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Composite Volcano
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Made of Lava and ash or just lava.
Made of alternating layers of ash and lava. Formed at destructive and constructive plate boundaries. Lava is thick and sticky and is cooler when they erupt there are pyroclastic flows There are volcanic bombs |
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Super Volcano
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A large volcano which forms a caldera and can form a crater lake after erupting. its effects can be devastating globally. its eruptions are thousands of times bigger than a normal volcano.
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Caldera
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When a Super Volcano loses its lava from an eruption, it collapses and creates a dip which can be up to 40km wide.
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Crater Lake
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When the Caldera fills with water it forms a Crater Lake
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Acid Lava
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thick and sticky, 800 degress celsius, found in composite vocanoes
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Basic Lava
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thin and runny, 1200 degrees celsius, found in sheild vocanoes
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Focus
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The point below the Earth's surface where the pressure is realeased
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Epicentre
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The point on the Earth's surface directly above the Focus
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Seismic Waves
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Waves produced when the pressure from the focus is released. Also known as Shock waves.
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