Key Words Flashcards
(21 cards)
Define Caldera?
A large ridge forming on the edge of a volcano, where the original has either collapsed or been destroyed in a large eruption.
Define Conservative Plate Margin?
A plate margin where the tectonics are sliding past each other.
Define Constructive Plate Margin?
A plate margin where the tectonics are moving apart.
Define Continental Crust?
The part of the Earth’s crust which makes the continents.
Define Convection Currents?
Circulating movements of the magma in the mantle caused by the heat of the core.
Define Destructive Plate Margin?
A plate margin where the tectonics collide.
Define Epicentre?
The point on the ground directly above the focus (centre) of an earthquake.
Define Focus?
The point of origin of an earthquake.
Define Magnitude?
The size of an earthquake.
Define Oceanic Crust?
The part of the Earth’s crust which is below the oceans.
Define Ocean Trench?
A deep depression on the ocean floor formed at the subduction zones of destructive plate margins.
Define Plates?
The large pieces of broken crust that cover the Earth.
Define Plate Margin?
Boundary between 2 tectonic plates.
Define Prediction?
Forecasting future changes.
What are Primary Effects?
Impacts of a natural disaster that happen immediately or soon after the event.
What is a Response?
The way in which people react to a situation e.g. an earthquake.
What are Secondary Effects?
The after effects of a disaster e.g. disease spreads due to dirty water, loss of economy due to destruction of businesses.
Define Subduction?
The transformation into magma of a denser tectonic plate as it divers under a less dense plate.
Define Supervolcano?
A volcano capable of erupting on a much larger scale than a normal volcano.
Define Tectonic Hazards?
Threats posed by earthquakes, volcanoes etc.
Define Tsunami?
Huge waves caused by an earthquake under sea.
