4.2 Flashcards
1
Q
the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present day locations
A
continental drift
2
Q
the process by which new oceanic lithosphere forms as magma rises to the surface and solidifies
A
sea-floor spreading
3
Q
a huge continent that Alfred Wegner thought that all continents once formed 245 million years ago
A
Pagaea
4
Q
underwater mountain chains that run through Earth’s basins
A
Mid ocean ridge
5
Q
this takes place when Earths magnetic poles change places
A
magnetic reversals
