3.1 Plate Tectonics Flashcards
divergent plate boundaries
when tectonic plates move away from each other
plate boundaries
the locations where tectonic plates interact
what happens when plates move away from each other
land forms
tectonic plates
sections that the earths crust are broken up into
why do tectonic plates move
they are carried by movements of magma in the upper mantle
hot spots
domes in the lithosphere that are caused by being broken into by a hot spot
where do hot spots form
in the magma in the mantle
when something gets more hot it gets ____ dense
less bc the particles bump faster and have more space between them
how do hot spots move into the lithosphere
they get super hot so less dense than lithosphere so they move up into the lithosphere
what happens to the crust because of hot spots
rifts form bc its cracking bc it gets skinnier and pushed up bc of the fat bump and it can eventually js break open
rift valley
cracks caused by hot spots (fat bumps) where hot spot area sinks and around it goes up
what national disaster is caused by convergent plate boundaries
earthquakes and volcanoes
why are volcanoes caused by convergent plate boundaries
subduction generates alot of heat
why are earthquakes caused by convergent plate boundaries
subduction causes a lot of shaking
wat earth things do convergent plate boundaries cause
mountains, volcanoes, island arcs, deep ocean trenches, and earthquakes
tsunami caused by what
A tsunami is a geologic event triggered when the shifting of undersea plates or an eruption causes a large amount of water to be displaced.
sea Floor spreading caused by what
Sea-floor spreading is the slow process by which diverging tectonic plates generate new sea-floor rock.
where does mountain building occur
convergent boundaries
transform boundary
where plates slide past one another
transform boundaries cause what
shallow earthquakes, large lateral displacement of rock, and a broad zone of crustal deformation, without creating or destroying crust
Which term best describes the geological feature at which earthquakes originate?
fault
fault
a fracture or crack in Earth’s crust where rocks on either side have moved relative to each other, potentially causing earthquakes when energy is released
