What is the primary reason for the asymmetrical distribution of continents and oceans across the Earth's surface?
Show answer & explanation
Correct answer: A
Explanation
Answer: Seafloor spreading and plate tectonics.
Explanation: The asymmetrical distribution of continents and oceans is mainly explained by the theory of Plate tectonics and the process of seafloor spreading. According to this theory, the Earth’s crust is divided into moving plates that float on the semi-molten mantle. Their movement leads to formation, shifting, and destruction of ocean basins and continents over geological time.
Additional Key Points:
Seafloor spreading occurs at mid-ocean ridges where new crust is formed.
Plate tectonics explains earthquakes, volcanoes, and mountain formation.
Continents were once part of a supercontinent called Pangaea.
The movement of plates causes redistribution of land and ocean areas over millions of years.
Potential Exam-Oriented Questions & Answers:
Question: What was the name of the ancient supercontinent?
Answer: Pangaea
Question: What geological features are explained by plate tectonics?
Answer: Earthquakes, volcanoes, and mountain formation