New crust is formed at trenches and older crust is subducted at oceanic ridges.
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Q13: Match the term with the appropriate phrase.
Q14: The oldest rocks are located at mid-ocean
Q15: The magnetic field of the Earth reverses
Q16: Deep-sea trenches are found at convergent plate
Q17: Match the term with the appropriate phrase.
Q19: The magnetic north pole has remained very
Q20: Match the term with the appropriate phrase.
Q21: Mantle plumes are columnar areas of hot
Q22: The Wilson Cycle uses plate tectonic processes
Q23: The book The History of Ocean Basins,
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