chapter 4 lesson 2 Flashcards
1
Q
the hypothesis that states that the continents one formed a single landmass, broke up, and drifted to their present locations
A
continental drift
2
Q
the first single huge continent
A
Pangaea
3
Q
the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies
A
sea-floor spreadng
4
Q
they are places where sea-floor spreading takes place
A
mid-ocean ridges
5
Q
when Earth’s magnetic poles change places
A
magnetic reversal
6
Q
the part of molten rock at mid-ocean ridges
A
magnetic minerails
7
Q
items that provide evidence that the continents were once closer together
A
fossilis
8
Q
Evidence for sea-floor spreading has come from ___
A
fossils in South America and Africa
