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

Continetal drift theory

Answer 5

The theory the continets gradually drifted over time to present position

Question 6

Athenosphere

Answer 6

A thin layer of earth 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

Mountains

Answer 9

Uplift or crustal plates that form elevated landmases

Question 10

volcanoes

Answer 10

A vent or 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. The movement causes seismic waves which produces earthquakes.

Question 13

Mid-ocean ridge

Answer 13

A long ridge of underwater volcanoes between two diverging oceanic plates.

Question 14

subduction zone

Answer 14

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