Plate Tectonics

Question 0

Supercontinent

Answer 0

A landmass comprising more than one continental core

Question 1

Alfred Wegener

Answer 1

In 1915 Alfred suggested that all the continents had once been joined together to form one supercontinent called Pangea

Question 2

Pangea

Answer 2

A super continent that was split into Gondwanaland and Laurasia

Question 3

Gondwana

Answer 3

Originally Gondwanaland was the southernmost of the two continents

Question 4

Laurasia

Answer 4

The northernmost of the two super continents that formed part of Pangea

Question 5

Lithosphere

Answer 5

The outer ridged layer of the Earth that includes the crust and the upper layer

Question 6

Asthenosphere

Answer 6

A layer of soft soil, mobile rock

Question 7

Convection currents

Answer 7

These are caused by the expansion of a liquid, soil or gas as it’s temperature rises. The expanded material, being less dense rises while colder denser material sinks

Question 8

Converging Plates

Answer 8

Plates that are moving towards each other

Question 9

Crust

Answer 9

The outermost solid shell of a planet

Question 10

Diverging Plates

Answer 10

Plates that are moving away from each other

Question 11

Epicentre

Answer 11

The point where an earthquake or underground explosion origionates

Question 12

Fault Line

Answer 12

A separation or crack in the earths crust. A line where two or more tectonic plates butt against each other.

Question 13

Lava

Answer 13

Molten rock expelled by a volcano upon eruption

Question 14

Magma

Answer 14

A mixture of molten and semi molten rock

Question 15

Inner Core

Answer 15

Hottest part in the centre of the earth

Question 16

Mantle

Answer 16

The mantle is a highly dense layer between the crust and the outer core

Question 17

Mid-Atlantic Ridge

Answer 17

Tectonic plates that are diverging located at the bottom of the Atlantic Ocean, belonging to the largest mountain range in the world

Question 18

Outer Core

Answer 18

The outer core of the earth is a liquid layer 2,266 km thick composing of Nicole and iron. It lies between the mantle and the inner core

Question 19

Pyroclastic Flow

Answer 19

A fast moving current of super heated gas (1000C) and rock which reach speeds moving away from a volcano of up to 700km/h

Question 20

Ring of Fire

Answer 20

An area located in the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur. This is the direct result of the movement and collisions of tectonic plates

Question 21

Seisomometer

Answer 21

An instrument that measures motions of the ground, including seismic waves generated by earthquakes, volcanic eruptions and other seismic sources

Question 22

Subduction Zone

Answer 22

The place where two lithospheric plates collide together one riding over the other

Question 23

Fossils

Answer 23

The remains or impressions of living organisms from the past

Question 24

Strata

Answer 24

Layers of rock ( singular = stratum )

Question 25

Pyroclastic Material

Answer 25

Hot rock and ash fragments released in a volcanic eruption

Question 26

Plate Tectonics

Answer 26

A study of the forces that cause the movement of the crustal plates