What is diamond?
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Throw some light on water temperature in oceans and its effect on marine life.
Explain techno-fossils?
What is the mantle made of?
What is natural resource?
Explain what are the examples of techno fossils?
Explain the examples of techno fossils?
Explain the difference between the geoid and the surface of the earth?
When does an atoll start to form?
Define the cambrian?
What is coal?
Differentiate between a semi-precious and a precious stone?
What is hardness scale?