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 plates

Answer 4

The layer of rock that makes up the outer part of the earth including the crust and upper mantle

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

Convention current

Answer 7

The process in which the hotter parts of a gas or liquid rise to the top ant the coole denser parts sink

Question 8

Convergent

Answer 8

When two tectonic plates come together

Question 9

Mountains

Answer 9

Uplift of crystal plates that form elevated landmasses

Question 10

Volcanoes

Answer 10

a vent of fissure in earths surface through which magma and gasses are expelled

Question 11

Divergent Boundary

Answer 11

when tectonic plates split apart

Question 12

Fault

Answer 12

Breaks in the crust

Question 13

Mid-ocean ridge

Answer 13

a long ridge of underwater volcanoes between two oceanic plates

Question 14

subduction zone

Answer 14

a place where one tectonic plate sinks under another and melts

Question 15

Rift valley

Answer 15

a long narrow valley between two diverging continenentalplates