tectonic plates Flashcards
what occurs at transform boundaries
earthquakes
Name the plate boundary that occurs when two plates slide past one another
Transform boundary
name the unifying theory that the earths plates are in slow, constant motion driven by convection currents
plate tectonics
name the large, rigid sections of the lithosphere that slowly moves onto of the asthenosphere
Plates
where do plates meet
at plate boundaries
how far may one side the of the sea floor move each year?
between 1cm and 20 cm each year
what type of boundary occurs when two plates move APART from one another?
Divergent boundaries
what type of boundary occurs when two plates move together?
convergent
what is it called when oceanic plate and continental plate collide and the denser the ocean plates forced downward
subduction zone
where are the youngest rocks located
at the mid ocean ridge
who came up with the idea of continental drift
Alfred wegener
name 4 types of evidence to support continental drift.
- fit together
- fossil clues
- climate
- rock clues
what causes continental drift
sea floor spreading
name the plastic-like layer of the earths surface below the lithosphere
asthenosphere
what type of plate boundary are the Himalayan mountains ?
convergent boundary
what is the idea that all of the continents were connected as one large land mass and at some point they separated?
continental drift
name the cycle of heating, rising, cooling, and sinking
convection current
are ocean floor rocks or continental rocks younger?
ocean floor rocks
what was the name for the super continent, meaning all lang?
Pangea
what is a fossil?
any trace of an ancient organism preserved in rock
what is the outmost layer of the earths surface?
crust
name the rigid layer of the earths surface made up of th curst and the upper mantle.
lithosphere
