because it don't rain.
Venus has little wind erosion because its thick atmosphere has very slow wind speeds, which are not strong enough to cause significant erosion on the planet's surface. Additionally, Venus's surface is predominantly covered by volcanic plains rather than loose, easily eroded materials like sand or dust.
surface erosion-the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.
The question is inappropriate because the surface of Mercury is not unmapped!
Mercury is known as the rockiest planet in our solar system. It has a surface that is heavily cratered and rocky, with very little evidence of any significant atmosphere or geological activity to modify its rocky surface.
Mercury's surface is barren, arid, waterless and airless. Being so close to the Sun it is subjected to the full intensity of the Sun's light, ultra-violet and infra-red radiation, as well as blasts of high-speed particles thrown out by solar flares. The surface is heavily cratered from meteoric impacts, and there is also evidence of ancient lava flows in the distant past.
Mercury is the planet that has surface features that can last for billions of years due to its lack of erosion. The lack of an atmosphere and geological activity on Mercury means that impacts from space are the primary process that shapes its surface features.
Mercury's surface looks similar to the moon's surface, with craters, plains, and mountains. Both Mercury and the Moon lack an atmosphere, leading to similar erosion and impact patterns on their surfaces.
Because the moon has neither liquid water or an atmosphere on its surface, there is very little weathering or erosion. Any weathering or erosion that does place is caused by repeated meteorite impacts, which break up and scatter the rocks and dust on the Moon's surface.
Erosion and deposition shapes the Earth's surface.
This is mainly because there is little or no atmosphere. Most agents of erosion cannot act in the environment as it is too cold too. Wind cannot act as there is little gas to be moved; rivers cannot exist as it is too cold, and then you must consider that the water cycle is essential for rivers to be generated; there are no oceans on the moon; there are no surface glaciers on the moon. Therefore, the moon has little or no erosion or, indeed, weathering, as this would require an atmosphere
Venus has little wind erosion because its thick atmosphere has very slow wind speeds, which are not strong enough to cause significant erosion on the planet's surface. Additionally, Venus's surface is predominantly covered by volcanic plains rather than loose, easily eroded materials like sand or dust.
surface erosion-the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.
the canals and dust
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Erosion changes the physical surface by removing part of the surface. This can be inform of abrasion or eroding away components of the surface.
Mars' surface features last for billions of years because of its thin atmosphere and minimal erosion processes, such as wind and water. This has helped preserve ancient features like impact craters and volcanoes on the planet's surface.
Meteorites smash into Mercury's surface to be so rocky