ELS (LG4) Flashcards
Actions to reduce impact of hazard
Mitigations
Adjusting to natural hazard
Adaptation
Natural continuous or recurring activities that shapes the earth’s surface
Geologic processes
Natural events that pose threat to human
Geologic hazards
Movements of the earths crustal plate
Plate tectonics
Cause of movements of tectonic plates
Convection currents
Process which rocks and minerals break down through process of physical, chemical, or biological
weathering
Abundant element on earth
Silicate
When rocks are fractured
Mechanical weathering
When rock react with environmental chemical
Chemical weathering
Breakdown of rocks by living organism
Biological weathering
the process by which sediments combine to form sedimentary rocks
Lithification
Movement of rock, solid, and debris down a slope due to gravity
Mass wasting
Removing trees
Deforestation
Counter for deforestation
reforestation
extracting mineral
mining
building infrastracture
Construction
Release of energy in the earth’s crust
Earthquakes
Earthquake is measured by
Richter scale
magma expelled from a volcano
Volcanic eruption
Series of massive ocean waves
Tsunami
Depression or holes
Sinkholes
Rapid flow of snow
Avalanche
are phenomena of atmospheric, hydrological, or oceanographic nature
Hydrometeorological hazard
Large violent tropical cyclone
Typhoon
Intense low pressure system characterized by strong spiral winds towards the center called EYE
Cyclone
Tropical depression
35kph to 63 kph
Tropical storm
64kph to 118kph
Typhoon
exceed 118kph
Storm with lightning
Thunderstorm
Rapid rotating air
tornado
rapid flood
flash flood
overflow of land areas
flood
2 elements of flood
rainfall Intensity
rainfall Duration
rise of sea level due to tropical cyclone
Storm surge
warming of ocean
El nino
fluctuations in temperature
El-nino southern oscillation
La nina
pag lamig
Caused by moon and sun gravitational pull
tides
the flow of water
tidal currents
wind driven waves can shape beaches
waves
flow of water in specific direction
Currents
main types of currents
Surface currents
Deep water currents
moving sand along the shore
Longshore drift
powerful force in coastal erosion
Hydraulic action
waves carry sediments strike against shoreline
abrasion