Global hazard patterns Flashcards Preview

Geography definitions > Global hazard patterns > Flashcards

Flashcards in Global hazard patterns Deck (10):
1

Asthenosphere

A semi-molten zone of rock underlying the Earth's crust

2

Conservative boundary

A boundary between plates where the movement of the plates is parallel to the plate margin and the plates slide past each other

3

Constructive boundary

A boundary between plates where the plates are diverging

4

Destructive boundary

A boundary between plates where the plates are converging

5

Lithosphere

The crust of the Earth, around 80-90km thick

6

Magma

Molten material that rises towards the Earth's surface when hotspots within the asthenosphere generate convection currents

7

Plates

Rigid, less dense 'slabs' of rock floating on the asthenosphere

8

Hotspot

A localised area of the Earth's crust with an unusually high temperature

9

Plume

An upwelling of abnormally hot rock within the Earth's mantle

10

Inter-tropical convergence zone

A zone of low atmospheric pressure near the equator which migrates seasonally