Key Terms Flashcards
1
Q
Asthenosphere
A
The layer in the Earth’s mantle below the lithosphere
2
Q
Convection currents
A
The continuous movement of a gas or liquid which, when warmed, rises and ,when cooled, sinks
3
Q
Continental drift
A
The theory that the continents are mobile
4
Q
Tectonic plate
A
A large slab of the Earth’s lithosphere and crust
5
Q
Sea-floor spreading
A
The lateral movement of new oceanic crust away from a mid-ocean ridge
6
Q
Rift valley
A
A valley formed by downfaulting between parallel faults
7
Q
Escarpment
A
A tilt block forming an extensive upland area, with a short, steep, scarp slope and a long, gentle, dip slope on the other side
