25.4 continental drit Flashcards
1
Q
what is continental drift
A
the process where continents (floating plate on top of the mantle) move over time
2
Q
how much do they move
A
like a few centimeters per year
3
Q
consequences of continental drift
A
1- alters habitats
2- allopatric speculation (geographical isolation)
4
Q
pangea’s consequences
A
1- ocean basins became deeper, lowering sea level and drained shallow costal areas, killing marines animals
2- the continent was cold and dry (more severe environment than central asia)