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Tides, Ocean Currents and Waves Video Lecture | Geography for Class 7
FAQs on Tides, Ocean Currents and Waves Video Lecture - Geography for Class 7
| 1. What are tides? |  |
Ans. Tides are the rise and fall of sea levels caused by the gravitational forces of the moon and the sun on the Earth's oceanic waters. They occur twice a day and can vary in height and intensity depending on the location.
| 2. How do ocean currents form? | |
Ans. Ocean currents form due to a combination of factors such as wind patterns, temperature differences, and the Earth's rotation. The wind pushes the surface water, creating surface currents, while density differences and the Coriolis effect contribute to the formation of deep ocean currents.
| 3. What factors influence the strength and direction of ocean currents? | |
Ans. The strength and direction of ocean currents are influenced by several factors, including wind patterns, temperature variations, the shape of the coastline, and the Earth's rotation. These factors interact to create complex circulation patterns in the oceans.
| 4. How do waves form in the ocean? | |
Ans. Waves in the ocean are formed by the transfer of energy from the wind to the water's surface. As the wind blows across the ocean, it creates ripples that develop into waves. The size and shape of the waves depend on the speed, duration, and fetch (distance over which the wind blows) of the wind.
| 5. What is the importance of understanding tides, ocean currents, and waves? | |
Ans. Understanding tides, ocean currents, and waves is crucial for various reasons. It helps in navigation and shipping, as sailors and mariners need to account for currents and tides to plan their routes. Additionally, it plays a significant role in coastal erosion and sediment transport, as well as in the distribution of nutrients and marine life in the ocean ecosystem.
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