Knowledge and Geological techniques Comments understanding and skills Use of a scatter diagram to identify a correlation between two variables. c. Forces driving plates Evaluation of the possible Candidates should be aware are a matter of current mechanisms for plate that currently the possible debate involving movement (role of mantle mechanisms for plate thermal convection of convection, slab pull, ridge movement are much the mantle together push). disputed. with gravitational forces and ocean lithosphere density differences at subduction zones. d. Some rocks contain a record of the direction of the Earth’s magnetic field at the time of their formation, known as remanent magnetism. This is linked to ferromagnetism in some iron minerals and their Curie temperatures. e. Palaeomagnetism can Candidates should be aware be used to determine of remanent magnetic changes of latitude as inclination in determining different continents changes in continental moved through latitude through geological geological time, time. indicating continental Knowledge of Polar drift. Ocean floor Wandering Curves is not magnetic anomalies required. indicate sea floor spreading.
Knowledge and understanding Geological techniques and skills Comments Use of a scatter diagram to identify a correlation between two variables. c. Forces driving plates are a matter of current debate involving thermal convection of the mantle together with gravitational forces and ocean lithosphere density differences at subduction zones. Evaluation of the possible mechanisms for plate movement (role of mantle convection, slab pull, ridge push). Candidates should be aware that currently the possible mechanisms for plate movement are much disputed. d. Some rocks contain a record of the direction of the Earth’s magnetic field at the time of their formation, known as remanent magnetism. This is linked to ferromagnetism in some iron minerals and their Curie temperatures. e. Palaeomagnetism can be used to determine changes of latitude as different continents moved through geological time, indicating continental drift. Ocean floor magnetic anomalies indicate sea floor spreading. Candidates should be aware of remanent magnetic inclination in determining changes in continental latitude through geological time. Knowledge of Polar Wandering Curves is not required.
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