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1. Wegener's theory, known as the theory of continental drift, did not initially provide a mechanism to explain how continents' rock patterns could match or why fossils on different continents were similar. This lack of explanation led to skepticism from the scientific community regarding his theory.
2. Wegener proposed that the continents were once connected in a supercontinent called Pangaea and that they drifted apart over time. However, he couldn't identify a sufficient force to explain this movement. Eventually, scientists discovered that the movement of continents is driven by the process of plate tectonics, which involves the movement of large plates of the Earth's lithosphere.
3. When an oceanic plate and a continental plate collide, the resulting feature is often a subduction zone. In this scenario, the denser oceanic plate is forced beneath the less dense continental plate due to the difference in their densities. This process can lead to the formation of deep ocean trenches, volcanic arcs, and earthquakes.
I hope this breakdown helps clarify the concepts for you! Let me know if you have any further questions.
