Plate tectonics

Question 1

Mantle

Answer 1

Layer of molten rock between the crust and core.

Question 2

Crust

Answer 2

The outemost shell of a rocky planet.

Question 3

Core

Answer 3

Made up of mostly iron seperated 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 lithospheric plates

Question 5

volcanoes a vent or fissure in earths surface through which magma and gases expelled.

Question 6

Continental drift theory

Answer 6

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

Question 7

Asthenosphere

Answer 7

Athin layer of earth about 150 miles thick at the border between the mantle and the crust.

Question 8

Convection current

Answer 8

The process in which the hotter parts of a gas or liquid rise to the top and the cooler denser parts sink.

Question 9

Convergent boundary

Answer 9

when two tectonic plates come together.

Question 10

Mountains

Answer 10

uplift of crustal plates that form elevated landmasses.

Question 11

mid ocean ridge

Answer 11

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

Question 12

Fault

Answer 12

breakes in the the crust. the movement causesseismic waves which produces earth quakes.

Question 13

divergent boundary

Answer 13

when tectonic plates split

Question 14

Subduction zone

Answer 14

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

Question 15

Transform boundary

Answer 15

when tectonic plates slide past each other.

Question 16

Rift valley

Answer 16

Along narrow valley between two diverging continental plates.