Answers created by Ahmed Abdallah

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• Irons normal melting point is 1535°C, yet Earth's inner core temperature is greater than 4000°C. Why does the inner core remain solid?
  
• What are density differences in the asthenosphere caused by?
  
• What properties are used to identify minerals?
  
• Question #ddd21
  
• What are the divisions of the geologic time scale?
  
• What is the phenomenon of movement of the continents that provides for the explanation for the similarity between Africa and South America?