DRA QUIZ deforming Flashcards
what is the amount of force placed on a given material called?
stress
the process by which the shape of a rock changes because of stress
deformation
when stress squeezes an object it is called
compression
when stress stretches and object it is called
tension
what can form when compression squeezes rocks at a convergent place boundary
large mountain ranges
what type of stress occurs at a divergent plate boundary
tension
the bending of rock layers due to stress
folding
a fold where both ends of the rock layers are horzontal
monocline
a downward, trough like fold in a rock layer
syncline
an upward arching fold in a rock layer
anticline
when rock layers break, the resulting surface they break and slide on is a
fault
when tension pulls rocks apart it creates a
normal fault
when compression pushes rock together it creates a
reverse fault
when opposing forces cause rocks to break and move horizontally, they create a
strike-slip fault
when a fault is not vertical a hanging wall and
footwall’s are formed
the hanging wall moves down relates to the foot wall in a
normal fault
the hanging wall moves up relative to the foot wall in a
reverse fault
when tectonic plates collide, folds and faults become
moutnain ranges
what kind of mountain range is formed when rock layers are squeezed and forced upward
folded mountains
what kinds of mountain range is formed when tension causes large blocks of crust to drop down
fault block mountains
what kind of mountain is formed when magma rises to the surface and erupts
volcanic mountains
Appalachian Mountains
folded mountains
Tetons
fault block mountains
Ring of Fire
volcanic mountains
The rising of Earth’s crust to higher elevations is called
uplift
the sinking of regions of the Earths crust to lower elevations is called
subsidence
when the Earth’s crust slowly springs back to its original elevation it is called
rebound
what happens to the ocean floor the farther the oceanic lithosphere is from a mid ocean ridge
the cooler and denser the lithosphere becomes because the oceanic lithosphere now takes up less volume the ocean floor subsides
a set of cracks that form when two tectonic plates are pulling away from each other is known as
rift zone
