Check youw Understanding 1.1 Why do meteorites have dark crusts? 1.2 How do regm

Question

Check youw Understanding 1.1 Why do meteorites have dark crusts? 1.2 How do regmaghypts form? 1.3 Which is the most common type of meteorite? 1.4 What type is a stone meteorite if it came from Mars? 1.5 What is the second most common metal in iron meteorites? Starting a Collection Collectors usually purchase meteorites at a per-gram price, which can range from cents to thousands of dollars, depend- ing on the rarity of the specimen. The physical characteristics of the purchased meteorite also can vary; not all will be an 16 unbroken or uncut specimen (Fig. 16.5A). A popular type is a slice or end piece (Fig. 16.5B). The exterior of a meteorite tells only part of the story. By slicing and polishing the meteorite, you can see the internal matrix and composition of the sample. Think of cutting the speci- men like slicing a loaf of bread: You end up with slices and two end pieces. The end pieces show the exterior of the mete- orite on one side and the interior on the opposite side. The individual slices show the interior on both sides as well as the edge around the slice, like the crust on a piece of bread. You can also buy fragments (Fig. 16.5C), pieces broken off a meteorite (either in flight or when it strikes the ground). These may exhibit a fusion crust but will not have a cut and polished side collectors obtain very small samples, called micro-mounts, of16.5 Examples of meteorte types: (A) uncut, (B) many different meteorites. Weighing up to a few grams each, end piece showing intermal matrix and composition, Due to the high cost of many meteorites, a number of and (Q) fragments they can be whole specimens, slices, end pieces, or fragments. Meteorites CHAPTER 16 309

Explanation / Answer

1.1. Meteorites have dark crust because of the friction with the atmosphere while falling at higher speeds. Outer part of the meteorite gets heated a lot and the conduction of heat from the outer to inner surface is slower in rocks, therefore the inner surface is brighter and the outer surface is darker and in the friction process, iron forms as a layer in the meteorite and hence it is darker. 1.2. Regmaglypts are small impressions on the meteorites which are formed by force due to friction from falling so that a part of meteorite evaporates or removed from the metorite. Regmaglypts are like thumb impression. 1.3. Stony meteorites are most common meteorites to hit earth. 1.4. Shergotite is a stoe type meteorite which it comes from Mars. In general, meteorite from Mars is called as Martian meteorite.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.