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Plate Tectonics

Restless Earth

QuestionAnswer
What are lithospheric plates? Rigid, but constantly and slowly moving, pieces of the Earth's surface
What is a convergent boundary? Where two tectonic plates come together
What is a divergent boundary? Where two tectonic plates move apart
What is a transform boundary? Where two tectonic plates slide past each other
What is continental drift? It is the theory that all continents are fragments of Pangaea now drifting apart
What is the asthenosphere? It is the partly melted layer of the mantle that is underneath the lithosphere
What is it called when one plate is pushed under another plate as they collide? Subduction
What is Pangaea? A super-continent it was composed of all the continents joined together
Who was the first to propose the theory of continental drift? Wegner
What is sea-floor spreading? When two plates move apart and new crust is created
Will the Earth's surface be the same after hundreds of years? No, because the Earth will keep changing as the tectonic plates keep moving as long as the core keeps heating up the mantle, which is dragging the plates
What is the point where an earthquake starts called? The focus
What is the ground directly above the focus called? The epicentre
What is the strength of and earthquake called? The magnitude
What is a seismograph? It is used to measure the speed and capacity of an earthquake
What is the name of the scale used to indicates the strength of an earthquake? A Richter scale
What is an earthquake? It is a sudden movement of the Earth's surface, happens when tectonic plates move
What are faults? The cracks found when plates diverge
What heats up the mantle and cause convection currents? The core
What would happen if the core stopped heating up the mantle? The convection currents would eventually stop
What is the theory of formation and movement of the Earth's surface? Plate tectonics
Created by: Amals
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