(a) Briefly Explain Why Mercury, Venus, And The Moon Do Not Have Significant Erosion . (b) – Assignment Example
Briefly explain why Mercury, Venus, and the Moon do not have significant erosion. Relate erosional activity to planetary size and distance from the Sun.
Erosion is defined as “the group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earths surface.” (The American Heritage Dictionary of the English Language, n.p.) It simply defines changes in the surface of the planets caused by diverse factors such as water, wind, or ice (Pearson Education, Inc. 18) More specifically, it is a “blanket term for weather driven processes that break down or transport rock. The processes that cause erosion are: glaciers, rivers, wind.” (Pearson Education, Inc. (PEI) 25)
Erosional activity is closely related to planetary size and distance from the Sun. Accordingly, “larger worlds also have more erosion because their gravity retains an atmosphere.” (PEI 30) In addition, the closer a planet is to the sun, the hotter it is disabling rain, snow and ice to occur and effect erosional activity. So, planets close to the Sun have less erosion. In addition, other factors such as planets having liquid water sustain more erosion; and the rotation of the planets contribute to erosion. The faster the rotation of planets, the more susceptible for erosion due to more weather and a stronger magnetic field (PEI 32).
Therefore, Mercury, Venus and the Moon share the following characteristics: (1) they are closer to the Sun; (2) they are smaller in size (compared to the Earth) cooling easier and hardening earlier therefore they do not retain an atmosphere; (3) Mercury and the Moon do not have geological activities; (4) it is more difficult for hot planets to retain an atmosphere. In these regard, these planets and the moon do not have significant erosion as compared to the Earth.
The American Heritage Dictionary of the English Language. “Definition of
Erosion.” Fourth Edition. Houghton Mifflin Company. Updated in 2009. Print.
Pearson Education, Inc. Chapter 9: Planetary Geology (Earth and the other
errestrial Worlds). Pearson Addison-Wesley. 2008. Print.