Define the cambrian?
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What is seismologists?
Explain which of the earths interior layers have been drilled and sampled?
Differentiate between a semi-precious and a precious stone?
Explain how the asthenosphere works?
What is seismic?
Explain the difference between a canyon, gorge, and valley?
What is clay?
How do we know magma does not originate in the liquid outer core?
Why does marble rarely contain fossils?
What is the cambrian?
What is erosion?
What do you mean by loam soil?