Front

What limitations did Alfred Wagner have while developing his theory of continental drift?

Back

Sonar had not been developed and the seafloor topography was not mapped.

Front

Pangaea

Back

Was a supercontinent that formed over 300 million years ago, was a supercontinent that broke apart over 250 million years ago, and means “all land”.

Front

Layer of semi-solid molten rock within Earth's interior. The crust rides on this layer.

Back

Mantle

Front

Tectonic plates float independently on the:

Lithosphere

,

Asthenosphere

,

ionosphere

,

Geosphere

Back

Asthenosphere

Front

Fossils of the Mesosaurus were found in Permian-aged rocks in certain regions of Brazil and South America and nowhere else in the world. Which of the following best explains these findings?

Back

South America and Africa were once joined together.

Front

Example of a convergent plate boundary: Mid-Atlantic Ridge, San Andreas Fault in California, The Western Coastline of South America, Hawaiian Islands

Back

The Western Coastline of South America

Front

Divergent plate boundaries produce which of the following features?

Volcanic island arc

,

Mid-ocean ridge

,

continental mountain ranges

,

subduction zone

Back

Mid-ocean ridge