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Layers of the Earth Video Lecture | Science Olympiad for Class 5
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FAQs on Layers of the Earth Video Lecture - Science Olympiad for Class 5
| 1. What are the different layers of the Earth? |  |
Ans. The Earth is composed of several layers. The innermost layer is the core, which is further divided into the solid inner core and the liquid outer core. Surrounding the core is the mantle, which is a thick layer of semi-solid rock. The outermost layer is called the crust, which is the thinnest layer and is divided into oceanic and continental crust.
| 2. What is the composition of the Earth's core? | |
Ans. The Earth's core is primarily composed of iron and nickel. The inner core is solid due to the immense pressure, while the outer core is in a liquid state. It is believed that the core also contains smaller amounts of other elements such as sulfur, oxygen, and carbon.
| 3. How thick is the Earth's mantle? | |
Ans. The Earth's mantle is approximately 2,900 kilometers thick. It extends from the bottom of the crust to the top of the core. The mantle is composed of hot, semi-solid rock and is responsible for the movement of tectonic plates.
| 4. What are the characteristics of the Earth's crust? | |
Ans. The Earth's crust is the outermost layer and is divided into two types: oceanic and continental crust. The oceanic crust is thinner and denser, primarily composed of basaltic rock. On the other hand, the continental crust is thicker and less dense, consisting mainly of granitic rock. The crust is where most geological activities, such as volcanic eruptions and earthquakes, occur.
| 5. How do scientists study the layers of the Earth? | |
Ans. Scientists study the layers of the Earth through various methods. One common method is seismic imaging, which involves analyzing the behavior of seismic waves (earthquakes) as they pass through different layers. By studying the speed, direction, and intensity of these waves, scientists can infer the composition and structure of the Earth's layers. Other methods include drilling deep boreholes and studying rock samples from different depths.
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Nov 24, 2024 Last updated |
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