Plate Margins Flashcards
Explain ridge push and slab pull as a cause of plate movement.
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Ridge push –magma rises as the plates move apart. The magma cools to form new plate material. As it cools It becomes denser and slides down away from the ridge. This causes other plates to move away from each other.
Slab pull – The denser plate sinks back into the mantle under the influence of gravity. It pulls the rest of the plate along behind it.
Slab pull – The denser plate sinks back into the mantle under the influence of gravity. It pulls the rest of the plate along behind it.
Explain ridge push and slab pull as a cause of plate movement.
What is a natural hazard?
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A natural hazard is a natural event such as an earthquake, volcanic eruption, tropical storm or flood that has the potential to cause death and damage.
What is a natural hazard?
Describe the physical processes that happen at a conservative plate margin.
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At a conservative margin, two plates move parallel to each other. They can be moving in the same or opposite directions. Pressure builds along the margin of tectonic plates. As friction is overcome the rock fractures releasing energy as an earthquake.
Describe the physical processes that happen at a conservative plate margin.
Why are volcanoes not found along conservative plate margins?
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This is because a conservative plate margin, sometimes known as a transform fault, is where two plates move past each other without direct collision.
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Why are volcanoes not found along conservative plate margins?
What are the characteristics of the outer core?
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The layer surrounding the inner core. A liquid layer of iron and nickel.
What are the characteristics of the outer core?
