Geography Flashcards
How many layers does the earth have?
4
What is the thickest layer of the earth?
The Mantle
What is the only liquid layer of the earth?
The outer core
What layer of the earth is semi-liquid?
The mantle
True of false?: the inner core is solid
True
What was wegner’s theory?
Wegener’s theory said continents were once joined as Pangaea and later drifted apart, supported by fossil evidence.
What was wegeners evidence?
Jigsaw fit,convection currents,fossil theory
What are the names of 4 major plates?
Eurasian plate,indo-australlian plate,nazca plate,south american plate
How did the 2004 boxing day tsunami happen?
When the indo-australlian plate subducted under the eurasian plate and then the eurasian playe flocked upwards
What is the diffirence between the richter and mercalli scale?
The richter scale measures the magnitude of the earthquake where as the mercalli scale is based on visual destruction that happend
What is the focus?
Where the earthquakes origionates
What is the epicenter?
The place which is directly above the focus
What is a convection current?
A comvection current is what moves the plates
What is a pyro-clastic flow?
They are fast moving moving currents of hot gas and rock
Where do volcanos usually form?
Covergent and divergent plate boundaries
What volcano do you get from convergent plate boundaries?
Cone volcanos
What volcano do you get from divergent plate boundaries?
Sheild volcanos
When did the hati earthquake happen?
2010
Give a human factor of why the hati earthquake
The buildings were not built in adherance to seismic design codes
What forms at a conservative plate boundary?
Eathquakes
What is a supervolcano?
A volcano that is 1000 times bigger than a regular volcano it also affect alot of the world by global cooling because of dust blocking the sunlight
Give an example of a supervolcano
Yellowstone
What is a caldera?
A large depression formed when a volcano erupts and collapes
What is a magma chamber?
Where the magma is stored in a volcano
