| You are here: Almanahj Website ⇒ American curriculum ⇒ 9th Grade ⇒ Geology ⇒ Term 1 | ||
|---|---|---|
Worksheet about Internal Structure of the Earth | ||
|---|---|---|
| Subject: Geology | ||
| 9th Grade | ||
| Term 1 | ||
| Year: 2023/2024 | ||
| Size: 192.6KB | ||
| Number of clicks: 166 | ||
| Publish date:November 25, 2023 | ||
| Added by: Eman | ||
| Last download date: 2024-09-10 09:15:05 | By: theodor Chandra Smellie | |
| File info: The internal structure of the Earth can be divided into the following layers: 1. Crust: The Earth's crust is the outermost layer and is relatively thin, ranging from about 5 to 70 kilometers (3 to 44 miles) in thickness. It is divided into two types: the continental crust and the oceanic crust. The continental crust is thicker and less dense, primarily composed of granitic rocks. The oceanic crust is thinner and denser, mainly composed of basaltic rocks. 2. Mantle: The mantle is located beneath the crust and is the thickest layer of the Earth. It extends from the base of the crust to a depth of about 2,900 kilometers (1,800 miles). The mantle is predominantly composed of solid rock, rich in silicate minerals. It is further divided into the upper mantle and the lower mantle. The upper mantle is relatively rigid, while the lower mantle exhibits increased plasticity and flow over long periods of time. 3. Outer Core: The outer core is a liquid layer located beneath the mantle, extending from about 2,900 to 5,150 kilometers (1,800 to 3,200 miles) in depth. It is primarily composed of molten iron and nickel, with smaller amounts of other elements. The outer core is responsible for generating Earth's magnetic field through a process called the dynamo effect, where the movement of the conductive liquid generates electric currents. 4. Inner Core: The inner core is the innermost layer of the Earth, extending from about 5,150 to 6,371 kilometers (3,200 to 3,959 miles) in depth. It is a solid sphere composed primarily of iron and nickel. Despite the extremely high temperatures, the immense pressure at the center of the Earth keeps the iron-nickel alloy in a solid state. The boundaries between these layers are not sharp, and there are gradual transitions in physical properties as one moves deeper into the Earth. The study of seismic waves and their behavior as they pass through different layers has provided valuable information about the internal structure of the Earth. | ||
| Downloading link Worksheet about Internal Structure of the Earth |
|---|
|
1700897603.pdf
The file is being prepared for download
|
| File images |
|---|
 |