For Prof. Xavier

1. How did society view Alfred Wegener’s continental drift theory? Explain the differences between these points-of-view.

2.Distinguish between internal and external processes that shape the Earth’s surface. For example, how are intrusive igneous rock formations different from extrusive ones and what role have those differences played in how the surface of the Earth developed and the civilization developed on top of that?

3.Discuss the difference between porosity and permeability of earth materials and how they affect their development and use of underground water supplies.