Plate Tectonics

Question 1

Core

Answer 1

dense mass of solid nickel, iron, and radioactive elements that release massive amount of heat

Question 2

Mantle

Answer 2

liquid layer of magma surrounding core, kept liquefied by intense heat from core

Question 3

convection

Answer 3

shifts and moves the rocky plates under Earth

Question 4

asthenosphere

Answer 4

solid, flexible outer layer of the mantle, beneath the lithosphere

Question 5

lithosphere

Answer 5

thin, brittle layer of rock floating on top of mantle

Question 6

crust

Answer 6

very outer layer of the lithosphere, earth’s surface

Question 7

divergent boundary

Answer 7

plates move away from each other

Question 8

Oceanic-oceanic divergent boundary (OOD)

Answer 8

as plates made up of oceanic crust pull apart, a crack in the ocean floor appears, then magma oozes up from the mantle to fill in the space

Question 9

what does ocean-ocean divergent boundary make?

Answer 9

mid-ocean ridge

Question 10

continental-continental divergent boundary (CCD)

Answer 10

2 continental lithosphere plates diverge and a valley like rift opens

Question 11

what does continental-continental divergent boundary make?

Answer 11

rift valleys - caused by sea floor spreading

Question 12

Convergent boundary

Answer 12

boundaries that converge into each other

Question 13

oceanic-continental convergent boundary (OCC)

Answer 13

the thinner and denser oceanic plate is overridden by the thicker and less dense continental plate - ocean plate undergoes subduction

Question 14

subduction zones

Answer 14

where an oceanic plate can slide underneath a continental plate due to it’s higher density, volcanic arc grows above the subducting plate

Question 15

what can oceanic-continental convergent boundaries make?

Answer 15

volcanoes, mountains

Question 16

oceanic-oceanic convergent boundary (OOC)

Answer 16

one of the plates subducts under the other, the older, denser one. subducting plate is heated as it is forced deeper into the mantle and begins to melt. As magma chambers begin to rise, if they reach the surface a volcanic eruption occurs

Question 17

what does oceanic-oceanic convergent boundary make?

Answer 17

volcanoes

Question 18

continental-continental convergent boundary (CCC)

Answer 18

2 thick continental plates collide-no subduction, intense compression can cause extensive folding and faulting of rocks.

Question 19

what do continental-continental convergent boundaries make?

Answer 19

mountains

Question 20

transform boundary

Answer 20

two plates that slide past each other, sometimes they get stuck, as they unstick, energy radiates outwards and shakes the earth

Question 21

example of OOD boundary

Answer 21

mid-atlantic ridge

Question 22

what do transform boundaries make?

Answer 22

earthquakes

Question 23

example of CCD boundary

Answer 23

East African rift valley, red sea

Question 24

example of OCC boundary

Answer 24

Juan de Fuca, Andes Mountain range

Question 25

example of OOC boundary

Answer 25

Caribbean islands of Martinique

Question 26

example of CCC boundary

Answer 26

Himalayas