t Line Calcul… -Safari QUESTION 10 What happens to a planetesimal with a chondri
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t Line Calcul… -Safari QUESTION 10 What happens to a planetesimal with a chondritie composition when it is heated to a high temperature? O a It forms an atmosphere of hydrogen and helium. b. It forms a planetary nebula. O c It differentiates, forming an iron core and a rocky mantle. Od. It forms a Jacobi ellipsoid. QUESTION 11 Box 2.3: The element contained inside Cl carbonaceous chondrites are a in the same proportions as those determined for the Sun. O b. much more abundant in silicon as compared to the Sun. much more abundant than iron as compared to the Sun. not in any way related to the elements contained in the Sun. d. QUESTION 12 9.1.1: Which statement(s) about achondrites is true? Oa They are stony meteorites that do not contain any chondrules Ob. They have generally been heated to their melting temperatures, and formed by crystallization of magmas on their respective parent bodies. OThey formed at the surface of a parent body where, early in the history of the Solar System, impact processes assembled a variety of materials. dAll of the above Click Save and Submit to save and submit. Click Save All Answers to save all ansuwersExplanation / Answer
10.what happen to a planetesimal with a chondrict composition when heated at a high temperature:
Answer :
B)It forms a planetary nebula
Explanation:
Chondrules is a single chondrirte group probablyformed over a much shorter period. Several types of chondrules formed under diverse conditions that we generally more oxidization with lower ambient temperatures and higher total pressures or high dust/gas ratios, so that liquids were atable for hours. Formation type of chondrules involved melting, condensation,evoporation, and acceration of solid , partly melted and completely melted materials. Chondrite materials are mixtures of materials that probably formed in diverse location in the solar nebula and traces of persolar material.
11. The element contained inside of cl carbonceous chondrite is
Answer
b) Much more abudant in silicon as compared to the sun
Explain
Several groups of carbonaceous chondrites, contain high percentages (3% to 22%) of water,as well as organic compounds. They are composed mainly of silicates, oxides and sulfides, with the olivine minerals and serpentine.Another indication of their age is the fact that the abundance of non-volatile elements in chondrires is similar tothat found in the atmosphere of the sun and other starsof galaxy.
12. which statement (s) about achondrite is true
Answer: d) All of the above.
Explain:
An achondrite is a stony meteroite that does not contain chondrules. It consists of material similar to terrestrial basalts or plutonic rocks and has been differentiated and reprocessed to a lesser or greated degree due to melting and recrystalization on or within meterorite parent bodies. As a result, achondrites have distinct textures and mineralogies indicative of igneous processes.
13. The relative abundances of elements in primitive carbonaceous chondrite meteroite, which is called chondrite composition
Answer: d) None of the above
Explain: Chondrites entirely lack chondrules and refractory inclusions; they are composed almost exclusively of fine- grained materil that has experienced a high degree of aqueous alteration on the parent asteroid. Cl chondrites are highly oxidsed, breccited rocks, containing abundant magnetite and sulfate minerals, and lacking metalic Fe.It is a were later destroyed during fromation of hydrous minerals, or they never had chondrules in first place. Cl chodrites are notable because their chemical compositions closely resembles that of the solar photosphere, neglecting the hydrogen and helium. Thus, they have the most "primitive" compositions of any meteorites and are often used as a standard for assessing the degree of chemical fractionation experienced by materials formed throughout the solar system.
14.Most of the presence recorded in meteorites, such as the acceration of CAIs, the formation of chondrules, melting of planetesimals,over a time period
Answer: d) less than one million years
the formation ages of ordinary and enstatite chondrites are uncertain, but, given the age ranges established for the end of metamorphism, they can be no more than five and nine million years after the formation of refractory inclusions, respectively. There is some evidence that enstatite chondrites formed about two million years after refractory inclusions. The formation ages of carbonaceous chondrites are also not known, but dating of minerals produced during their alteration by liquid water indicates they must have formed within three–seven million years, and possibly less than one million years, after the formation of refractory inclusions.
15.our present understanding of how the solar system came into being is that
Answer c)about 4.6 billion years ago, the sun formed by gravity driven contraction of an intersellar gas cloud containing mostly hydrogen but also traces of dust called solar nebul
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