Final answer:
Scientists use various methods to determine plate movements, such as observing changes in the Earth's magnetic field and using space satellites like GPS.
Explanation:
Scientists determine the rates of plate movements by various methods such as observing changes in the Earth's magnetic field, drilling core holes in the oceanic crust, and using space satellites like GPS. This information is input into computer models to predict future plate configurations, revealing movements like California towards Alaska.
Learn more about Plate Movements and Earth's Surface here:
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