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Movements of Ocean Water: Introduction Video Lecture | Geography Class 11 - Humanities/Arts
FAQs on Movements of Ocean Water: Introduction Video Lecture - Geography Class 11 - Humanities/Arts
| 1. What are the main factors that cause the movement of ocean water? |  |
Ans. The main factors that cause the movement of ocean water are wind, temperature, density, and the Earth's rotation. Wind generates surface currents, while temperature and density differences create deep ocean currents. The rotation of the Earth also influences the direction of ocean currents.
| 2. How do surface currents differ from deep ocean currents? | |
Ans. Surface currents are driven by wind and occur in the top few hundred meters of the ocean. They are more influenced by external factors such as wind patterns and are generally faster and more visible than deep ocean currents. On the other hand, deep ocean currents are driven by density differences and occur in the deeper layers of the ocean. They are slower, more stable, and less affected by surface conditions.
| 3. What role do ocean currents play in climate regulation? | |
Ans. Ocean currents play a crucial role in climate regulation by distributing heat around the globe. Warm ocean currents carry heat from the equator to higher latitudes, warming the surrounding air and influencing regional climates. Cold ocean currents, on the other hand, transport cold water from higher latitudes towards the equator, cooling the air and affecting local climates. These heat transfers help regulate global temperature patterns.
| 4. How do ocean currents impact marine ecosystems? | |
Ans. Ocean currents have a significant impact on marine ecosystems. They distribute nutrients and food particles, affecting the productivity and distribution of marine life. Currents can influence the migration patterns of marine species and determine the distribution of plankton, which forms the base of the marine food chain. Additionally, currents can transport larvae and propagules of marine organisms, influencing population connectivity and genetic diversity.
| 5. Can ocean currents cause coastal erosion? | |
Ans. Yes, ocean currents can contribute to coastal erosion. Strong currents, especially during storms or high tides, can erode beaches and cliffs by carrying away sediments and undercutting the shoreline. Longshore currents, which flow parallel to the coast, can also transport sediments along the shoreline, leading to the erosion of certain areas and the accumulation of sediments in others. The impact of ocean currents on coastal erosion can vary depending on local conditions and the strength of the currents.
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