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Geology Flash Cards
Grade 3
January 2015
Core
Crust
Earthquake
Epicenter
Fault
Hazard
Latitude
Longitude
Magnitude
Mantle
Richter scale
Ring of Fire
Seismic Waves
Seismogram
Tectonic plates
Tsunami
Volcano
Waves
Core
The center of
the Earth.
Crust
Thin outer layer
of Earth.
3-30 miles thick.
Earthquake
Sudden shaking
of Earth’s
surface due to
movement along
a fault.
Epicenter
Place on ground
directly above
an earthquake.
Fault
Break in
Earth’s crust.
Boundary
between
two plates.
Hazard
A dangerous
situation.
Latitude
Distance
measured north
or south from
the Equator.
Longitude
Distance
measured east or
west from
Prime Meridian.
Magnitude
The measure of
the size of an
object or event.
Mantle
Earth’s layer
between the core
and crust.
Richter
Scale
A scale that
measures
earthquake
strength.
Ring Of
Fire
Location
of most
earthquakes
and volcanoes.
Seismic
Waves
Energy waves
produced by an
earthquake.
Seismogram
Records seismic
waves made by
an earthquake.
Tectonic
Plates
Pieces of Earth’s
crust that “float”
on mantle layer.
Tsunami
A large water
wave, or group
of waves, caused
by an
earthquake.
Volcano
Mountain
formed by rise of
molten rock
from inside
the Earth.
Waves
Transfer of
energy with a
repeating
pattern.