What can I write in the conclusion for a geography project whose topic is structure and landforms of the Earth ?
Answers
Answer:
landform is a natural or artificial feature of the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Typical landforms include hills, mountains, plateaus, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas,[citation needed] including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins.
Physical characteristics Edit
Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure, and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features.
This panorama in Great Smoky Mountains National Park has the readily identifiable physical features of a rolling plain, actually part of a broad valley, distant foothills, and a backdrop of the old, much weathered Appalachian mountain range
Hierarchy of classes Edit
Karst towers landforms along Lijiang River, Guilin, China
Oceans and continents exemplify the highest-order landforms. Landform elements are parts of a high-order landforms that can be further identified and systematically given a cohesive definition such as hill-tops, shoulders, saddles, foreslopes and backslopes.
Some generic landform elements including: pits, peaks, channels, ridges, passes, pools and plains.
Terrain (or relief) is the third or vertical dimension of land surface. Topography is the study of terrain, although the word is often used as a synonym for relief itself. When relief is described underwater, the term bathymetry is used. In cartography, many different techniques are used to describe relief, including contour lines and TIN (Triangulated irregular network).
Elementary landforms (segments, facets, relief units) are the smallest homogeneous divisions of the land surface, at the given scale/resolution. These are areas with relatively homogeneous morphometric properties, bounded by lines of discontinuity. A plateau or a hill can be observed at various scales ranging from few hundred meters to hundreds of kilometers. Hence, the spatial distribution of landforms is often scale-dependent as is the case for soils and geological strata.
A number of factors, ranging from plate tectonics to erosion and deposition, can generate and affect landforms. Biological factors can also influence landforms— for example, note the role of vegetation in the development of dune systems and salt marshes, and the work of corals and algae in the formation of coral reefs.
Landforms do not include man-made features, such as canals, ports and many harbors; and geographic features, such as deserts, forests, and grasslands. Many of the terms are not restricted to refer to features of the planet Earth, and can be used to describe surface features of other planets and similar objects in the Universe. Examples are mountains, hills, polar caps, and valleys, which are found on all of the terrestrial planets.
The scientific study of landforms is known as geomorphology.
Recent developments Edit
Landforms may be extracted from a digital elevation model using some automated techniques where the data has been gathered by modern satellites and stereoscopic aerial surveillance cameras.[1] Until recently, compiling the data found in such data sets required time consuming and expensive techniques involving many man-hours. The most detailed DEMs available are measured directly using LIDAR techniques.
Structure and landforms of the Earth.
Explanation:
Structure of the Earth:
The structure of the earth consists of rocks and soil. The Earth's crust is divided into several rigid blocks or tectonic plates that have been displaced from one place to another during geologic history.
The shape of the earth is similar to that of an oblate spheroid. It is almost spherical and flattens slightly at the poles. The highest point on Earth is Mount Everest, whose height is 8848 m. is. On the other hand, the lowest point is the Mariana Trench in the Pacific Ocean, whose depth is 10,911 m above sea level.
Landforms:
Many types of landforms are found on the upper layer of the earth, in which continents, oceans, mountains, plateaus, plains, valleys, deltas etc. are prominent.
Continents and oceans are prominent in the first type of landforms.
The second type of landform includes mountains, plateaus and plains.
In the third type of landforms, valleys, waterfalls, gorges, canyons, deltas, sand stupas, glaciers, eskers, drumlins etc. are prominent.
The role of weathering, erosion and deposition is most important in the formation of landforms. Endogenous forces like volcanoes and earthquakes also play an important role in the development of landforms. Apart from this, exo-genetic forces like flowing water, glaciers, wind, ocean waves etc. also play an important role in the development of landforms.
Learn more: Landforms
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