earthquake Flashcards
An is the sudden shaking or
trembling of the Earth’s surface caused by
the release of energy stored in the Earth’s
crust.
earthquake
causes of earthquakes
tectonic plates movement
volcano activity
fault slippage
The Earth’s outer shell (lithosphere) is made up of
large slabs called tectonic plates that float on the semi-fluid layer of the
mantle below. These plates constantly move, but the edges where they interact
are often locked by friction. When the stress along these edges (or faults)
becomes too great, the plates suddenly shift, causing an earthquake.
Tectonic Plate Movements
plate boundaries
convergent
divergent
transform
: Plates push against each other.
Convergent Boundaries
Plates move apart.
Divergent Boundaries:
: Plates slide past one another.
Transform Boundaries
: In areas near volcanoes, earthquakes can be
triggered by the movement of magma (molten rock) beneath the
Earth’s surface. As magma rises, it fractures surrounding rocks,
creating seismic activity.
Volcanic Activity
Earthquakes also occur when there is a sudden slip
along a fault line
Fault Slippage:
main layers of earth
crust
mantle
outer core
inner core