natural hazards and the earth Flashcards
what is a natural hazard?
is when a tornado,hurricane, tsunami etc occurs and not a large sum of people are harmed.
what is a natural disaster?
a natural disaster is a event such as a tornado that effects a lot of people and live stock
name a natural hazard
1990 Queensland flood
name a natural disaster
2004 Southern India tsunami.
name the 4 layers of the earth
inner core,outer core,mantle crust.
how are earthquakes created?
earthquakes are caused by the release of built-up pressure inside the Earth’s crust.
what are convection currents?
movement with the earth’s mantle that drives tectonic plates to move.
what is the main reason hazards and disasters occur?
built up energy.
define tectonic plate
the division of the earth’s crust.
define the mantle
the largest and semi molten part of the earth’s structure
what is continental drift?
the gradual movement of continents through geological time.
what are pate boundaries?
the place where two or more tectonic plate meet.
define core
the inner most part of the earth’s structure.
what should and regency survival bag include?
food, water,any items you wish to save.
