■ MAGNETIC FIELD OF OTHER SOLAR SYSTEM OBJECTS

#Magneticfield

◇ Mercury - Mercury's magnetic field is approximately a magnetic dipole (meaning the field has two poles) and is just 1.1% that of Earth's magnetic field. It’s proximity to the sun makes it next to impossible to sustain an atmosphere.

◇ Mars - Mars does not have an intrinsic global magnetic field, but the solar wind directly interacts with the atmosphere of Mars, leading to the formation of a magnetosphere. The lack of a significant magnetosphere is thought to be one reason for Mars's thin atmosphere.

◇ Venus - Venus lacks a magnetic field. Its ionosphere separates the atmosphere from outer space and the solar wind. In spite of the absence of a magnetic field, Venus’s atmosphere is one of the densest among the terrestrial planets.

◇ Jupiter - Jupiter has the largest magnetic field and a thick atmosphere.

◇ Saturn - Saturn's magnetosphere is the second largest of any planet in the Solar System after Jupiter.

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■ GEOMORPHIC MOVEMENTS

#Geomorphology #Earthmovements

◇ Earth’s crust and its surface are constantly evolving (changing) due to various forces emanating from below (endogenic forces) as well as above the surface of the earth (exogenic forces).

◇ These forces cause physical and chemical changes to the geomorphic structure (earth’s surface).

◇ Some of these changes are imperceptibly slow (e.g. weathering, folding), some others are gradual (e.g. erosion) while the remaining are quite sudden (earthquakes, volcanic eruptions.

◇ Geomorphic: relating to the form of the landscape and other natural features of the earth's surface.

◇ Geomorphic agents: mobile medium (like running water, moving ice masses or glaciers, wind, waves, currents etc.) which removes, transports and deposits earth materials.

◇ Geomorphic processes: physical and chemical processes that take place on the earth’s surface (folding, faulting, weathering, erosion, etc.) due to endogenic and exogenic forces.

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