What is the difference between numerical and relative age dating? Give an example of a technique or principle that is used for each. 42. Why was Wegener’s theory of continental drift rejected? What information did Wegener lack to have a more complete view of crustal movement? How was plate tectonics a more complete theory than Wegener’s? 43. Describe the different types of convergent boundaries. Which ones generate volcanic activity? Which ones have subduction? Why don’t all convergent boundaries generate volcanic activity? 44. Describe the differences between mafic and felsic igneous rocks and magma. Give at least 5 points of comparison between the two. You may provide your answer in table format

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