| You are here: Almanahj Website ⇒ American curriculum ⇒ 10th Grade ⇒ Geology ⇒ Term 1 | ||
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Worksheet about Earths Magnetic Field | ||
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| Subject: Geology | ||
| 10th Grade | ||
| Term 1 | ||
| Year: 2023/2024 | ||
| Size: 246.2KB | ||
| Number of clicks: 112 | ||
| Publish date:November 28, 2023 | ||
| Added by: Eman | ||
| Last download date: 2024-09-10 15:14:50 | By: theodor Grace Vogt | |
| File info: The Earth has a magnetic field that extends from its core into space. It is often referred to as the Earth's magnetic field or geomagnetic field. The magnetic field is generated by the motion of molten iron in the outer core of the Earth. The main features of the Earth's magnetic field are as follows: 1. Magnetic Dipole: The Earth's magnetic field is approximately aligned with a dipole, which means it has north and south magnetic poles. However, the geographic North Pole of the Earth is actually close to the magnetic South Pole, and the geographic South Pole is close to the magnetic North Pole. This is why a compass needle points north, as it aligns with the Earth's magnetic field. 2. Magnetic Field Lines: The Earth's magnetic field lines extend from the magnetic South Pole to the magnetic North Pole. These lines form a complex pattern around the Earth, but they are roughly aligned with the axis of rotation. The magnetic field lines are not evenly spaced but are denser near the poles. 3. Magnetosphere: The Earth's magnetic field extends far into space and creates a region around the Earth called the magnetosphere. The magnetosphere acts as a protective shield, deflecting and trapping charged particles from the solar wind (a stream of charged particles emitted by the Sun). This helps protect the Earth's atmosphere and surface from harmful solar radiation. 4. Van Allen Radiation Belts: Within the magnetosphere, there are two regions known as the Van Allen radiation belts. These belts are composed of charged particles, mainly electrons and protons, that are captured by the Earth's magnetic field. The particles in the radiation belts are trapped in loops along the magnetic field lines and can be influenced by solar activity, causing fluctuations in the intensity of the belts. The Earth's magnetic field has practical implications and is utilized in various ways. It allows for navigation using compasses and aids in the development of technologies such as magnetic compasses, magnetometers, and magnetic resonance imaging (MRI) machines. Scientists also study the Earth's magnetic field to gain insights into the planet's interior structure, the dynamics of the core, and the mechanisms behind the generation of the magnetic field. | ||
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