Hazardous Earth Flashcards
what are the our major layers of the earths structure?
Crust ,mantle, outer core, inner core
which layer of the earth is the thickest?
Mantle
what two layers of the earth is entirely solid?
crust and inner core
what are the two different types of crust?
continental crust and oceanic crust
what type of crust is more dense? why is this significant?
oceanic crust, this is significant because when a oceanic and continental plate crash together is subducts
what is the name of the process that causes the earth tectonic plates to move?
convection currents
how many different types of plate boundaries are there?
three
what direction do the plates move in at a convergent plate boundaries?
towards each other
true or false? volcanoes occur at conservative plate boundaries?
false
explain two characteristics of a shield volcano
it is tall ans it has a narrow base
explain two characteristics of a composite volcano
its short and has a wide base
what is a hotspot?
an area of the Earth’s mantle from which hot plumes rise upward, forming volcanoes on the overlying crust
complete the sentences :
In an earthquake, the point of rupture- where the earthquake happens underground is called the f______. Shock waves radiate out from this point. The e______ is the point directly above this on the earths surface ( where the earthquake is felt the most).
- fault
- epicenter
what does magnitude mean?
the size of the earthquake
what is the name of the scale that earthquakes are measured on?
seismometer
