The Earth's Layers

Discussion Questions
 

1. How did Andrija Mohorovicic discover that the Earth's crust is made of less dense rock than the mantle.
   
    
2. Write in your own words the definition of a discontinuity.
   
    
3. Name the four layers of the Earth in order from the outside to the centre of the Earth.
   
    
4. What causes the mantle to "flow"?
    
    
5. What are the two main metals that make up the outer and inner core?
   
    
6. Describe in your own words how the Earth's layers were formed.