8.9B
fault
A break - The crustal feature formed when two continental plates slide against each other
Subduction zone
A destructive plate margin where oceanic crust is being pushed down into the mantle beneath a second plate.
Mountain range
A group of connected mountians
ridge
A long, narrow chain of hills or mountains - underwater for divergent boundaries
Subduction zone
Boundary in which two plates come together and one plate plunges under another turning into magma
Geologic
Having to do with the science devoted to the study of the Earth, particularly the solid Earth and the rocks that compose it.
Volcanic island
Island like Hawaii where a volcano was formed to make the entire island. Results from melting related to the subduction of the older, denser oceanic crust.
mountains
Mountains form when tectonic movements squeeze rock layers together into accordion-like, folded mountains.
Crustal features
The features on Earth's crust that are created as a result of plate tectonics.
Collide
crash together with violent impact
rift valley
crustal feature formed when two continental plates move away from each other
Earthquake
a sudden and violent shaking of the ground, as a result of movements within the earth's crust or volcanic action.
hot spot
a volcanically active area of Earth's surface far from a tectonic plate boundary
Volcanoes
an opening in the Earth's crust through which molten lava, ash, and gases are ejected. - often at convergent - subduction sites
Mid-ocean ridge
an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
Divergent boundary
boundary between two tectonic plates that are moving AWAY from each other
Convergent boundary
boundary between two tectonic plates that are moving TOWARDS each other
Tectonic plates
huge pieces of crust and rigid upper mantle that fit together at their edges to cover Earth's surface
Plate boundary
the region where two tectonic plates touch
Continental crust
thicker, less dense, older crust making the continents
Oceanic crust
thinner, more dense, younger crust making up ocean floor