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Chapter 9 study guide .
Review . . . .
15
Environmental Studies
9th Grade
02/27/2013

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Cards

Term
What was the name of the supercontinent ?
Definition
Pangaea, meaning all land
Term
What did Wegener argue must have once been joined based on fossils ?
Definition
South America and Africa must have been joined
Term
What does rock evidence exists in the form of ?
Definition
Rock evidence for continental drift exists in the form of several mountain belt that end at one coastline, only to reappear on a landmass across the ocean
Term
Where were areas of glacial til found ?
Definition
LAYERS of glacisl til were found in Southern Africa and South America, as well as India and Australia. It is interesting that much of the land area that shows evidence of these glaciations now lies near the equator in a subtropical climate
Term
What could Wegener not describe ?
Definition
Wegener could not describe a mechanism that was capable of moving the continents across the globe
Term
What is the new theory known as ?
Definition
The new theory was known as plate tectonics. This theory provides the framework for understanding most geologic process, such as the information of the mountains
Term
What are the segments of the lithosphere called ?
Definition
Plates
Term
What are the segments driven by ?
Definition
The movement is driven by the unequal distribution of heat within Earth. Hot material found deep in the mantle moves slowly upward as part of Earth's internal convection system
Term
What are also called spreading centers ?
Definition
Divergent boundaries
Term
What happens at convergent boundaries ?
Definition
Two plates move together
Term
What is the example of a transform plate boundary ?
Definition
Transform plate boundaries are margins where two plates grind past each other without the production or destruction of lithosphere
Term
What are two things continuously add oceanic lithosphere ?
Definition
Spreading and upwelling of magma continuously adds oceanic lithosphere
Term
What is the longest physical feature of Earth's surface ?
Definition
The system of ocean ridges is the longest physical feature on Earth's surface.
Term
What is the process by which new oceanic lithosphere is produced ?
Definition
Seafloor spreading is the process by which plate tectonics produces new oceanic lithosphere .
Term
What are subduction zones ?
Definition
Destruction plate margins where oceanic crust is being
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