plate tectonics Flashcards
Subduction zone type 1
Collision between an oceanic and continental plate forming a ocean trench.
what are the 3 types of plate boundaries?
Spreading
Transform
Collision
subduction zone 2
the collision if 2 oceanic plates forming mountain rangers
Spreading boundaries
plates move away from each other. Create mid ocean ridges
what are transform boundaries?
plates that scrap along each other. produce earthquakes
what is the theory of tectonic plates
slabs of lithosphere that float along the asthenosphere
Theory of continental drift
continents have moved from Pangea- super continent
what are the types or seismic waves
body waves
surface waves
what are the types of body waves and what do they do
secondary and primary
p waves can travel through everything
s can only travel through mantle
what’s are the types of surface waves and what are they
love waves
only travel surface
what is the focus
point below surface where earthquake begins
what is the epicenter
point on surface directly above focus
how do volcanoes form
molten rock and gases from the mantle escape
