Volcano And Earthquakes Vocab Flashcards
Conservative boundary
Where two tectonic plates slide past each other, but where crust is neither formed or destroyed
Collision boundary
Where continental plates collide
Constructive boundary
Where two tectonic plates move apart from each other and new crust is formed
Continent
A large land mass
Core
The centre of earth
Crust
The thin outer layer of solid rock round the earth surface
Destructive boundary
Where an oceanic plate slides underneath a continental plate or another oceanic plate
Dormant
Inactive
Epicentre
The point on the earth surface directly above the focus of an earthquake
Equator
The imaginary line running round the middle of the earth
Extinct
No longer in existence: (of animals)
No longer active (volcano)
Fault
A line of weakness in rock
Focus
The point underground where the energy of an earthquake is released
Foreshock
A small earthquake before a large one
Geothermal energy
Heat and electricity produced from hot, underground water
Joint
A crack in the rock
Lava
Molten rock at the Earth’s surface
Lahar
Mudflow triggered by a volcanic eruption
LEDC
Less economically developed country
MEDC
More economically developed country
Magma
Molten rock beneath the earths crust
Mantle
The semi-solid mass of rock beneath the Earth’s crust
Percentage
The number out of 100
Plate boundry
The point where two tectonic plates meet
Plate tectonics
The theory explaining how the earths crust is able to move
Pyroclastic flow
A cloud of superheated gas and ash ejected from a volcano
Raw material
Mineral and agricultural resources which can be processed to make something else
Seismic wave
A shock wave produced by earthquakes
Seismometer
A sensitive instrument use to measure earthquakes
Tectonic plate
A large, rigid section of the earths crust
Tsunami
A sea wave caused by earthquakes and volcanic eruptions
Vegetation
Trees, shubs and plants
Volcanic bomb
Lava exploded into the air which solidifies as it falls
