Integrated Science
Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 13, Problem 1CQ

Describe the protoplanet nebular model of the origin of the solar system. Which part or parts of this model seem least credible to you? Explain. What information could you look for today that would cause you to accept or modify this least credible part of the model?

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To determine

The description of the protoplanet nebular model of the solar system and the part of the model which seem credible. Also, the information that can lead to the acceptance of the least credible part of the model.

Answer to Problem 1CQ

A protoplanet is the earliest stage in the formation of a planet which involves three stages: (A) The formation of elements heavier than hydrogen and creation of large clouds of dust and gases, (B) The beginning of formation of large and slowly rotating nebula from the remaining gas, dust, elements and compounds of chemical compounds and (C) It begins when protosun establish as a star after undergoing an initial flare-up which blasted away most of the hydrogen and helium gas around the inner planets.

The information regarding the reason for the formation of the planets, the reason for the accretion disk, and reason for the inner planets being rocky when the outer planets are gaseous can lead to the acceptance of the least credible part of the model.

Explanation of Solution

A protoplanet is the earliest stage in the formation of a planet. The model can be considered in stages, which are not really a part of the model but a convenient way for better understanding. It involves three stages which are given below.

Stage A: It is the stage of formation of the solar system which consists of the formation of the elements heavier than hydrogen. It involves the creation of large clouds of dust and gases which rotates slowly from the supernova of earlier stars.

Stage B: It involves the beginning of formation of large and slowly rotating nebula which is larger than the solar system from the remaining gas, dust, elements and compounds of chemical compounds when pulled into the center which then clumps together from numerous collisions.

Stage C: This stage begins when the protosun establish as a star after undergoing an initial flare-up which blasted most of the hydrogen and helium gas around the inner planets. The planets are sometime heated early in their formation so that the heavier elements are pulled to the center. Early atmosphere is formed from gases from the interiors of the planets.

There are many parts of the model which may not seem credible. The information regarding the reason for formation of the planets, the reason for the accretion disk, and reason for the inner planets being rocky when the outer planets are gaseous can lead to acceptance of least credible part of model.

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