Semester 2 Flashcards
Types of plate boundaries
- Divergent
- Convergent
- Transform
Divergent boundary
where new crust is generated as the plates pull away from each other.
Convergent boundary
When two plates push against each other
Transform boundaries
where crust is neither produced nor destroyed as the plates slide horizontally past each other.
Epicentre
point at the earth’s surface, directly above the focus.
Fault
a fracture in the rocks that makes up the earth’s crust
focus (hypocentre)
the point within the earth where an earthquake rupture starts
plates
massive rocks that make up the outer layer of the earth’s surface, and whose movement along faults triggers earthquakes.
Seismic waves
waves that transmit the energy released by an earthquake.
what are Geological/geophysical hazards and examples
Natural hazards occuring from beneath the earth’s surface. Example: Earthquakes, tsunamis and volcanos.
What are Geomorphic, Climatological, Cryosphere hazards and examples
Natural hazards occuring from on the earth’s surface. Example: Melting glaciers and landslides.
What are Atmospheric or Meteorological Hazards and examples
Natural hazards occuring from above the earth’s surface. Examples: drought and tornado.
What are hydrological hazards
Any natural hazard relating to water. Examples: tides and flooding.
direct relationship
relationship where both variables increase together or both decrease together
Causal relationship
consists of direct or indirect relationships. It is a relationship indicating that one event is the result of another event.