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1.4 Plate Tectonics

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Question
Answer
Why is Earth interior hot?   30% from earth's formation, 70% radioactive decay  
Alfred Wegener?   Proposed the first coninental drift model based on the 'jigsaw' fit of all the coninents plus showed that all the ice sheets and share fossils  
Pangaea?   Super continent 300 Ma ago  
Benioff Zone?   Area under subduction zone, earth quakes and volcanism 200kms  
Bathemetry of MOR?   2500m above sea floor  


   


 

 

 

 

 

 
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