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Video: The Earth's crust Video Lecture | IGCSE Cambridge Science for Year 7 - Class 7
FAQs on Video: The Earth's crust Video Lecture - IGCSE Cambridge Science for Year 7 - Class 7
| 1. What is the composition of the Earth's crust? |  |
Ans. The Earth's crust is primarily composed of solid rocks, which are made up of minerals such as quartz, feldspar, and mica.
| 2. How thick is the Earth's crust? | |
Ans. The Earth's crust varies in thickness, with an average thickness of about 30-50 kilometers beneath the continents and around 5-10 kilometers beneath the oceans.
| 3. What are the different layers of the Earth's crust? | |
Ans. The Earth's crust is divided into two main types: the continental crust, which is thicker and less dense, and the oceanic crust, which is thinner and denser.
| 4. How do tectonic plates interact with the Earth's crust? | |
Ans. Tectonic plates are large sections of the Earth's crust that float on the semi-fluid mantle below. These plates interact with each other through processes such as subduction, seafloor spreading, and continental collision.
| 5. How does the Earth's crust contribute to geological phenomena like earthquakes and volcanic eruptions? | |
Ans. The Earth's crust is dynamic and constantly in motion, which can lead to geological phenomena like earthquakes and volcanic eruptions. These events are often caused by the movement of tectonic plates and the release of pressure from within the Earth's crust.
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