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. seperated 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

continental drift theory

Answer 5

the theory that 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 cooler, denser parts sink.

Question 8

convergent boundary

Answer 8

when to tectonic plates come together.

Question 9

mountains

Answer 9

uplift of crustal plates that form elevated landmasses

Question 10

volcanoes

Answer 10

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

Question 11

divergent boundary

Answer 11

When tectonic plates split apart.

Question 12

transform boundary

Answer 12

when tectonics plates slide past each other.

Question 13

fault

Answer 13

break in the earths crust and makes earthquake.

Question 14

fault

Answer 14

break in the earths crust and makes earthquake.

Question 15

mid-ocean ridge

Answer 15

a long ridge of underwater volcanoes between two diverging ocean plates

Question 16

subduction zone

Answer 16

a place where one tectonic plate sinks under another and melts. also forms of a trench.9

Question 17

rift valley

Answer 17

a long narrow valley between two diverging continental plates