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

Continental Drift Theory

Answer 5

The theory that continents gradually drifted over time to their present positions. 9

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 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 an elevated landmass.

Question 10

Volcanoes

Answer 10

A vent or fissure in Earth’s surface through which magma and gasses are expelled.

Question 11

Fault

Answer 11

Breaks in the crust. The movement causes seismic waves which produces earthquakes.

Question 12

Mid- Ocean Ridge

Answer 12

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

Question 13

Subduction Zone

Answer 13

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

Question 14

Rift Valley

Answer 14

A long narrow valley between two diverging continued plates.