Quiz 11-Ch 7 (Deformation)

Question 1

Brittle

Answer 1

low pressure representative of the upper crust results in deformation by fracturing

Question 2

Ductile

Answer 2

high pressure representative of depths deeper in earth’s crust results in deformation by deforming/bending without fracturing

Question 3

Temperature

Answer 3

low pressure and high temperature results in ductile behavior

Question 4

Temperature

Answer 4

low pressure and high temperature results in ductile behavior

Question 5

Rock types & Deformation

Answer 5

hard igneous and metamorphic rocks often behave as brittle while sedimentary rocks that overlie igneous rocks fold gradually

Question 6

rock deformation and speed

Answer 6

a rock formation that is deformed slowly may behave as ductile but if it is deformed rapidly it may behave as brittle

Question 7

rock deformation and forces

Answer 7

rocks generally fracture easier when subjected to pulling and stretching rather than compressional forces

Question 8

tensional forces

Answer 8

stretching and pulling - dominate divergent boundaries where rocks pull apart

Question 9

compressive forces

Answer 9

squeeze and compress - convergent boundaries where rocks meet

Question 10

shearing forces

Answer 10

push two sides of a rock formation in opposite directions - dominate at transform boundaries where plates slide past each other

Question 11

fault

Answer 11

fracture surface across which rocks are displaced

Question 12

anticline

Answer 12

rocks bent upward into arcs

Question 13

syncine

Answer 13

rocks bent downward into troughs

Question 14

syncline

Answer 14

rocks bent downward into troughs

Question 15

joint

Answer 15

a crack along which no appreciable movement has occurred