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This flashcard set will help you to prepare for Science Unit 8 Quiz 1 and the final unit test.


study of the processes which formed the Earth's crustal rocks and surface landforms


referring to the movement and changes in the Earth's crust

Earth's Surface

usually covered by a thin layer of soil or by a body of water


the thin, fragile, outermost layer of the Earth


Earth's crust consists of ______.

Earth's Crust

below the thin layer of soil and water that cover the surface of the Earth


Oceanic crust is ______ than the crust below the continents

Oceanic Crust

It is about 5 km thick.


Oceanic crust is made of ______ covered with a very thin layer of salt sediments.


consist primarily of granite

Continental Crust

It is about 32 km thick.

Less Dense

Granite is _______ (lighter) than basalt


it appears to rise to higher elevations or float on the mantle

Crustal Plates

movement of ______ on the mantle is called plate tectonics

Tectonic Plates

Large pieces of Earth's crust


Tectonic Plates _____ on top of the Earth's upper mantle


There are _____ large tectonic plates and many smaller ones.

Continental Drift

theory that the continents were once a single, large landmass and slowly drifted apart

geological features

_____ appear to line up when the continents are placed back together in a single landmass


Scientists have also found ____ in eastern South America which match those found in western Africa.

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