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Worksheet about The structure of the earth | ||
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| Subject: Geology | ||
| 3rd Grade | ||
| Term 1 | ||
| Year: 2023/2024 | ||
| Size: 552.1KB | ||
| Number of clicks: 113 | ||
| Publish date:November 23, 2023 | ||
| Added by: Eman | ||
| Last download date: 2024-09-05 10:02:15 | By: theodor Yesica Katherine Trujillo Rodriguez | |
| File info: The Earth is composed of several layers, each with its own unique characteristics. The structure of the Earth can be divided into three main layers: the crust, the mantle, and the core. 1. Crust: The crust is the outermost layer of the Earth, and it is the thinnest layer. It is divided into two types: the continental crust and the oceanic crust. The continental crust is thicker and less dense compared to the oceanic crust. It primarily consists of rocks such as granite. The oceanic crust is thinner and denser and is mainly composed of basalt. 2. Mantle: The mantle is located beneath the crust and is the thickest layer of the Earth. It extends to a depth of about 2,900 kilometers (1,800 miles). The mantle is primarily composed of solid rock, although it can deform and flow over long periods of time under high pressure and temperature. The uppermost part of the mantle is called the asthenosphere, which has a partially molten or semi-fluid state. 3. Core: The core is the innermost layer of the Earth and is divided into two parts: the outer core and the inner core. The outer core is a liquid layer composed mainly of molten iron and nickel. It surrounds the inner core, which is a solid sphere consisting of iron and nickel. The core plays a crucial role in generating the Earth's magnetic field. It is important to note that the structure of the Earth has been determined through various scientific methods, including seismic studies, laboratory experiments, and analysis of meteorites. Our understanding of the Earth's interior continues to evolve as new discoveries and research are conducted. | ||
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