Plate Margins Flashcards
How can natural hazards be classified?
Click to View the Answer
Click to View the Question
- Tectonic hazards
- Atmospheric hazards
- Geomorphological hazards
- Biological hazards
How can natural hazards be classified?
Give two possible reasons why tectonic plates move.
Click to View the Answer
Click to View the Question
Convection currents & Slab pull (+ ridge push).
Give two possible reasons why tectonic plates move.
Explain ridge push and slab pull as a cause of plate movement.
Click to View the Answer
Click to View the Question
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.
Why are volcanoes not found along conservative plate margins?
Click to View the Answer
Click to View the Question
This is because a conservative plate margin, sometimes known as a transform fault, is where two plates move past each other without direct collision.
.
Why are volcanoes not found along conservative plate margins?
Describe the physical processes that happen at a destructive plate margin.
Click to View the Answer
Click to View the Question
When oceanic and continental plates collide the denser oceanic plate subducts the continental plate and enters the mantle where it melts. Magma can rise through the lithosphere and erupt as lava through volcanoes. As the oceanic plate subducts, it gets stuck due to friction. Pressure builds up until it is released as an earthquake.
Describe the physical processes that happen at a destructive plate margin.
