Unit 8 Earth's Surface
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Created by:
MrsChristinaPaulk on April 5, 2012
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This flashcard set will help you to prepare for Science Unit 8 Quiz 1 and the final unit test.
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20 terms
Terms | Definitions |
|---|---|
 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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