FlashFlowGeography - Earthquakes & Plates (y9)
Earthquakes, How to prevent them, tectonic plates , plate boundaries and more…
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Tectonic plate
A large section of Earth's crust and upper mantle.
Earth's crust
The thin, solid outer layer of Earth.
Mantle
A thick layer of hot, semi-molten rock beneath the crust.
What causes tectonic plates to move?
Heat-driven convection currents in the mantle, ridge push, a…
Plate boundary
The location where two tectonic plates meet.
Destructive boundary
Where two plates move towards each other, often involving su…
Subduction
The process where a denser oceanic plate sinks beneath anoth…
Constructive boundary
Where two plates move apart and magma rises to create new cr…
Conservative boundary
Where two plates slide past each other, often causing earthq…
Collision boundary
Where two continental plates move together, resulting in mou…
Earthquake
A sudden release of energy caused by movement in Earth's cru…
Focus
The point underground where an earthquake begins.
Epicentre
The point on the surface directly above an earthquake's focu…
Seismic waves
Waves of energy released by an earthquake.
Richter scale
A scale historically used to measure earthquake magnitude.
Magnitude
A measurement of the total energy released by an earthquake.
Why do earthquakes occur at plate boundaries?
Plate movement builds up stress that is suddenly released.
Tsunami
A series of large sea waves usually triggered by underwater …
Liquefaction
When waterlogged ground temporarily behaves like a liquid du…
How to make buildings earthquake-resistant?
Use flexible structures, strong frames, shock absorbers, and…
Can earthquakes be accurately predicted?
No, scientists can identify risk zones but cannot reliably p…
Seismometer
An instrument used to detect and record ground vibrations.
Hazard-risk equation
Risk is determined by the hazard, vulnerability of people, a…