Hard questins for earth test Flashcards
The theory that the earth is broken into plates and are in motion due to convection currents in the asthenosphere
plate tectonics
process in which two plates collide and the denser ocean plate descends below the other
Subduction
the continents once formed a single landmass, broke up, and drifted to their present location
Theroy of continental drift
A large area of hot magma under the earth were magma/lava is realeased.
Hot spot
Erupts sometimes
Active
Not likely to erupt
Extinct
Erupted a long time ago and likly to erupt again sleeping
dormant
What is this volcano
caldera
What is this volcano
strato
What is this volcano
Shield
What is this volcano
Cinder cone
What is a rift valley
A lowland region that forms were earths tectonic plates move apart Found at bottom of ocean
The inner core is made of
Solid metal
What is the outer core made of
liquid meatal
The process by which new oceanic crust forms as magma rises towards the surface
sea floor spreading
