What is the cambrian?
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What is the difference between the geoid and the surface of the earth?
How old is the earth? How has the earth evolved since formation? How do you calculate the age of earth?
What is ore?
Explain the constitution of mantle?
What is hematite?
Explain the name of the largest volcano in the world?
Tell me what's the difference between 'soft' rock and 'hard' rock geology?
Explain the difference between a canyon, gorge, and valley?
What is pyrite?
Why did the continents spread apart?
Throw some light on water temperature in oceans and its effect on marine life.
Describe the formation of metamorphic rocks?