What is the key concept for this section? What are tectonic plates? What is continental drift? Define and distinguish among divergent, convergent, and transform plate boundaries. Define volcano and...

What is the key concept for this section? What are tectonic plates? What is continental drift? Define and distinguish among divergent, convergent, and transform plate boundaries. Define volcano and describe the nature and major effects of a volcanic eruption. Define earthquake and describe its nature and major effects. What is a tsunami and what are its major effects?