plate tectonics

Question 1

crust

Answer 1

the outermost shell of a rocky planet

Question 2

mantle

Answer 2

layer of molten rock between the crust and core

Question 3

core

Answer 3

made up of mostly iron.separated into the outer core(molten) and inner core(solid)

Question 4

tectonic plate

Answer 4

the layer of rock that makes up the outer part of the earth, including the crust and upper mantle (lithospheric plstes)

Question 5

continental drift theory

Answer 5

the theory that continents gradally drifted over time to their present

Question 6

asthenosphere

Answer 6

a thin layer of earth, about 150 miles think, at the border between the mantle and the crust

Question 7

convecton current

Answer 7

the pprocess in witch the hotter of a gas or liquid rise to the top and the cooler,denser part sink.

Question 8

convergent bourdary

Answer 8

when two tectonic plates come together.

Question 9

mountanis

Answer 9

uplift of crustal plates that form elevated landmasses

Question 10

volcanoes

Answer 10

a vent or fissure in earths surface through wich magma and gases are expelld

Question 11

divergent boundary

Answer 11

when tectonic plates split apart.

Question 12

transform boundary

Answer 12

when tectonic plates slide past each other.

Question 13

fault

Answer 13

breaks in the crust. the movement causrs seismic waves which produces earthquakes

Question 14

mid- ocean ridge

Answer 14

a long ridge of underwater volcanoes between two diverging oceanic plates.

Question 15

subduction zone

Answer 15

a pace where one tectonic plate sinks under another and melts.also forms a trench

Question 16

rift valley

Answer 16

a long narrow valley between two diverging continetal plates