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 plates

Question 5

tectonic plate

Answer 5

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

Question 6

continental drift theory

Answer 6

the theory that continents drifted over time to their present positions

Question 7

asthenosphere

Answer 7

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

Question 8

convection current

Answer 8

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

Question 9

convergent boundary

Answer 9

when two tectonic plates come together

Question 10

mountains

Answer 10

uplift of crustal plates that form elevated landmasses

Question 11

volcanoes

Answer 11

a vent or fissure in earth’s surface through which magma and gases are expelled

Question 12

transform boundary

Answer 12

when tectonic plates slide past each other

Question 13

divergent boundary

Answer 13

when tectonic plates split apart

Question 14

fault

Answer 14

breaks in crust the movement causes seismic waves which produce earthquakes

Question 15

mid ocean ridge

Answer 15

a long ridge of underwater volcanoes between two diverging oceanic plates

Question 16

subduction zone

Answer 16

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

Question 17

rift valley

Answer 17

a long narrow valley between two diverging continental plates