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 int 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 (lithosphere plates)

Question 5

continental drift theory

Answer 5

the theory that the continents gradually drifted over time to their present positions.

Question 6

asthenosphere

Answer 6

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

Question 7

convection current

Answer 7

the process in which the hotter parts of a gas or liquid rise to the top and the cooler denser parts sink

Question 8

convergent boundary

Answer 8

when two tectonic plates come together

Question 9

mountain

Answer 9

uplift of crustal plates that form elevated landmass

Question 10

volcanno

Answer 10

a vent or fissure in earth surface through which magma and gasses are expeled

Question 11

divergent boundary

Answer 11

when tectonic plate split apart

Question 12

transform boundary

Answer 12

when tectonic plates slide past each other

Question 13

transform boundary

Answer 13

when tectonic plates slide past each other

Question 14

fault

Answer 14

break in the crust the movement causes seismic wave which produces earth quakes

Question 15

mid ocean ridge

Answer 15

a long fidge of underwater volcanoes between two diverging oceanic plates

Question 16

subduction zone

Answer 16

a place where one tectonic plat sinks under another and melts also forms trench

Question 17

rift valley

Answer 17

a long narrow valley between two diverging continental plates