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Introduction to Interior Of The Earth Video Lecture | Social Studies (SST) Class 7 (Old NCERT)
FAQs on Introduction to Interior Of The Earth Video Lecture - Social Studies (SST) Class 7 (Old NCERT)
| 1. What is the interior of the Earth? |  |
Ans. The interior of the Earth refers to the layers of the Earth beneath its surface. It consists of three main layers - the crust, the mantle, and the core.
| 2. What is the composition of the Earth's crust? | |
Ans. The Earth's crust is composed mainly of solid rocks and minerals. It is primarily made up of oxygen, silicon, aluminum, iron, calcium, sodium, and potassium.
| 3. What is the thickness of the Earth's mantle? | |
Ans. The Earth's mantle is approximately 2,900 kilometers thick. It is the layer located between the crust and the core, and it is composed of hot, solid rock.
| 4. What are the two types of Earth's core? | |
Ans. The Earth's core is divided into two parts - the outer core and the inner core. The outer core is composed of liquid iron and nickel, while the inner core is solid due to the immense pressure.
| 5. How do scientists study the interior of the Earth? | |
Ans. Scientists study the Earth's interior through various methods, including seismic waves, drilling, and analyzing volcanic eruptions. Seismic waves, generated by earthquakes, provide valuable information about the Earth's structure and composition. Drilling allows scientists to directly access and study rocks from different depths. Additionally, volcanic eruptions can provide insights into the materials present deep within the Earth.
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