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Features of Ocean Floor Video Lecture | Geography Class 11 - Humanities/Arts
FAQs on Features of Ocean Floor Video Lecture - Geography Class 11 - Humanities/Arts
| 1. What are some features of the ocean floor? |  |
Ans. Some features of the ocean floor include underwater mountains or seamounts, deep trenches, mid-ocean ridges, and abyssal plains. These features are formed due to tectonic activity and volcanic processes in the ocean.
| 2. How do underwater mountains or seamounts form on the ocean floor? | |
Ans. Underwater mountains or seamounts form on the ocean floor through volcanic activity. When molten rock, called magma, rises to the surface through cracks in the Earth's crust, it solidifies and forms a mountain. Over time, as more volcanic activity occurs, the seamount grows larger.
| 3. What causes deep trenches on the ocean floor? | |
Ans. Deep trenches on the ocean floor are primarily formed by tectonic plate movements. When two tectonic plates collide, one plate is forced beneath the other in a process called subduction. This subduction creates deep trenches in the ocean floor.
| 4. What are mid-ocean ridges and how do they form on the ocean floor? | |
Ans. Mid-ocean ridges are underwater mountain ranges that run through the middle of the ocean basins. They are formed by tectonic plate divergence, where two plates move away from each other. As the plates separate, magma rises up from the Earth's mantle, cools, and solidifies, creating new crust and forming the mid-ocean ridge.
| 5. What are abyssal plains and how are they formed on the ocean floor? | |
Ans. Abyssal plains are flat, sediment-covered areas on the ocean floor. They are formed through the accumulation of fine sediments, such as clay and silt, over millions of years. These sediments are transported by ocean currents and settle on the ocean floor, creating the smooth, featureless abyssal plains.
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