Natural Disasters Flashcards
What are natural disasters
A natural disaster is an event that causes damage to property and loss of lives
What are natural hazards
A natural hazard is and event that poses threat to human life and property “potiential harm”
What are the three types of disasters
Geomorphological climatic and biological
Give some examples of climatic disasters
Tornadoes thunderstorms and ice storms
Give some examples of geomorphological disasters
Landslides and erosion
Give examples of biological disasters
Covid 19 Malaria and dengue fever
Name another type of disaster
Technological
Give examples of technological disasters
This is man caused like nuclear radiation structural collapse
What is flooding
Flooding is a temporary overflow or accumulation of water that covers a usually dry area
What are the types of flooding
Riverine coastal flash urban
What is riverine flooding
This is when a rivers water overflows the banks
What is coastal flooding
This is when the sea can over flow defenses such as sea walls due to heavy rain fall
What is flash flooding
This is flooding that rises fast and drops fast without warning
What is urban flooding
This is caused by land development the permeable layers of soil are replaced with impermeable layers of paved surfaces
What are the natural causes of flooding
Long rainfall relief prolonged rainfall
What are the human causes of flooding
Land development improper waste disposal and degradation of the environment
What is a hurricane
A hurricane is a severe storm which can have high winds and prolonged rainfall
What forms a hurricane
The Coriolis effect makes up the hurricane
What are the parts of the hurricane
Eye eye wall and rain bands
How are hurricanes categorized
They are categorized by a saffir simpson scale
What is an earth quake
An earthquake is an intense shaking of the earths surface. This is cause by movements of the earths outer most layer
How does and earth quake happen
This happens because of seismic activity
Where are the three areas about 80% of ALL earthquakes occur across the earth?
These places are Ring of fire. Alpine belt and oceanic ridge
What are seismographs?
Seismographs are instruments used to measure earthquakes
How do seismographs work
They work by drawing a jagged line to reflect the movement . The bigger the earthquake the greater the height of the line
What type of magnitude scale (for measuring earthquakes strength) is preferred by seismologists today?
Movement magnitude scale
