ive It Some Thought: Craters and Moons 2019 > Part B.Determining the age of impa

Question

ive It Some Thought: Craters and Moons 2019 > Part B.Determining the age of impact craters ifus geographical features on the Moon. Due to the absence of weathering and erosion (a result of its low on the Moon's surface remain virtualy unchanged. This relative permanence affords the ability to study the a Impact craters are one of the most otvious, and plent atmosphere and lack of running water), impact craters features of these impact craters Younger craters often exhibt rays" of lightty calored ejected material radiaing out from the crater on top can sometimes be used to determine the age of one crater relatve to another. Imagine an object impacting a fresh surface, leaving a large crater. Than, a . Because newer craters would cover evidence af older craters, it is possible to determine the order of crater formation by looking at which craters ane second crater overlaps the rim of the first. In fact, for two given craters, the crator mar overaps or is inside is me y unger of me two craters The image below shows mutiple craters. You a A are lustrated as light streaks re looking art he crasters from above. The rims of the craters are black crdes. The three rays that rad ate trom crater You wil note that thene are four primary craters. A, B, C, and D . Ejecta tom some of the craters formed additional craters The impact hat created crater A resulted in two secondary craters (both labeled "a1 and three rays Simlarly, the impact that created crater D resulted in one secondary crater labeled "d']. Using this infamstion and your knawledge of the farmatian of craters, rank the four craters from okdest to youngest. Rank from oldest to youngest. Ray

Explanation / Answer

Craters age are determined moslty by counting craters, which means counting craters in a craters. C is the oldest one, because it having two secondary craters on it before D and A it forms that's why it having the bombarded material of craters A and D, next to that D is formed, because A rays still intersect the D, which clearly explains D formation, later A was formed and then B, becuase B overlaps A. So the recent one is B.

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