What fossil gave a clue to the theory of continental drift?
The deepest parts of the ocean are located at ___________
What was the name of he supercontinent that existed 220 million years ago?
A divergent boundary that originates on land is known as a ______________
Which layer in the Earth generate the Earth's magnetic field?
What formed the Hawaiian islands?
What was Wegener's training in?
Who came up with the theory of sea-floor spreading?
A ____________ is the circular motion of material due to heating and cooling
All of he crust and the top portion of the mantle is known as the _____________
The northern half of the Pangaea
The only ocean that existed at the time of Pangaea
At the time of Pangaea, the __________ sea was located between Africa and Eurasia
The alps were created when Europe collided with _____________
The rising up of material from the asthenosphere at mid ocean ridges is known as ______________
Beginning in 1990 the space probe __________ began to map the surface of Venus
The upper crust is made up primarily of _________ rocks
At a depth of about _______________km water is released from subducting plates