continental drift theory Flashcards
(9 cards)
name five pieces of evidence in the continental drift theory
- puzzle piece
- fossils
- mountain ranges
- ice sheets
- age of the oceanic crust
what is puzzle piece?
the shape of the continents fit together like a puzzle piece
what is fossil?
fossils of the same creatures were found on two continents that are very far from each other
what is mountain range?
mountain ranges, which seem to be the same age and type of rock, are broken by the ocean which otherwise would fit together
what is ice sheet?
ice sheets developed in areas that are tropical today and too warm for snow and ice
this suggests that the plates have moved apart and farther south
what is age of the oceanic crust?
as you move away from the plate boundaries, the age of the crust is older
what is divergent plate movement?
two plates move apart from each other
can cause volcanic activity
what is convergent plate movement?
two plates push against each other
can cause volcanic activity
what is transform plate movement?
two plates slide past each other
