Plate tectonics vocab

Question 1

a weak plastic layer of the mantle situated below the lithosphere; rock within this zone is easily deformed

Answer 1

asthenosphere

Question 2

the innermost layer of the earth beneath the mantle; divided into inner core and outer core

Answer 2

core

Question 3

the rigid outer layer of the earth including crust and upper mantle

Answer 3

lithosphere

Question 4

a body of molten rock found @ depth, including dissolved gases and crystals

Answer 4

magma

Question 5

a continuos elevated zone on the floor of all the major oceans basins

Answer 5

mid-ocean ridge

Question 6

the proposed supercontinent that 200 million years ago began to break and form the present land masses

Answer 6

pangaea

Question 7

a hypothesis that originally proposed that the continents had once been joined as a super continent

Answer 7

continental drift

Question 8

the vibration of earth produced by the rapid release of energy

Answer 8

earthquake

Question 9

a fracture in earth along which movement has occurred

Answer 9

fault

Question 10

the process by which plate tectonics produces new oceanic lithosphere @ ocean ridges

Answer 10

seafloor spreading

Question 11

a mechanism that contributed to plate motion in which cook dense oceanic crust sinks into the mantle and pulls the trailing lithosphere along

Answer 11

slab pull

Question 12

deep faulted structure found along the axes of divergent plate boundaries

Answer 12

rift valley

Question 13

a destructive plate margin where oceanic crust is being pushed down into the mantle beneath a second plate

Answer 13

subduction zone

Question 14

place where one plate is moving relative to another plate

Answer 14

plate boundaries

Question 15

made up of material on the ocean floor

Answer 15

oceanic crust

Question 16

made up of continental land masses

Answer 16

continental crust