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

geology

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

tectonics

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

Crust

the thin, fragile, outermost layer of the Earth

Bedrock

Earth's crust consists of ______.

Earth's Crust

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

Thinner

Oceanic crust is ______ than the crust below the continents

Oceanic Crust

It is about 5 km thick.

Basalt

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

Continents

consist primarily of granite

Continental Crust

It is about 32 km thick.

Less Dense

Granite is _______ (lighter) than basalt

Granite

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

Float

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

Seven

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

fossils

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

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