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 the 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 position

Question 6

asthenosphere

Answer 6

a thin layer of earth about 150 miles thik 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

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 witch magma and gases are expelled

Question 11

divergent boundary

Answer 11

when tectonic plates split apart