| You are here: Almanahj Website ⇒ American curriculum ⇒ 11th Grade ⇒ Geology ⇒ Term 1 |
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Worksheet about Earths Spheres | ||
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| Subject: Geology | ||
| 11th Grade | ||
| Term 1 | ||
| Year: 2023/2024 | ||
| Size: 229.9KB | ||
| Number of clicks: 135 | ||
| Publish date:November 29, 2023 | ||
| Added by: Eman | ||
| Last download date: 2024-09-04 21:52:05 | ||
| By: theodor Nerissa Felicien | ||
| File info: The Earth is approximately an oblate spheroid, meaning it has a mostly spherical shape but is slightly flattened at the poles and bulging at the equator. This shape is a result of the Earth's rotation. The Earth's equatorial diameter is slightly larger than its polar diameter. The equatorial diameter measures approximately 12,742 kilometers (7,918 miles), while the polar diameter measures around 12,714 kilometers (7,900 miles). This means the Earth is slightly wider at the equator than it is from pole to pole. The deviation from a perfect sphere is due to the centrifugal force generated by the Earth's rotation. As the Earth spins on its axis, the centrifugal force causes the material at the equator to move slightly outward, resulting in the bulging shape. This is known as the equatorial bulge. The Earth's shape has been extensively measured and studied through various means, including satellite measurements, geodesy, and global positioning systems (GPS). These measurements provide precise data on the Earth's dimensions and shape. It's important to note that while the Earth is an oblate spheroid, its surface also has variations and irregularities at smaller scales, such as mountains, valleys, and oceanic trenches. These features are a result of geological processes and tectonic activity on the Earth's crust. | ||
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