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Notice: This Advice is free advice and only for (Fun). It is provided by person or persons not affiliated with the Unsolved Mysteries website and neither Unsolved Mysteries or the persons giving the advice will assume any responsibility for consequences for the actions you take as a result.
Date: 2/15/2004 7:02:00 PM
From Authorid: 22433
all these answers should be somewhere in the books. i dont think they'd give you the questions if the answer wasn't in the book   |
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Date: 2/16/2004 6:04:00 PM
From Authorid: 34487
Per my hubby who has a degree in Geology.... #1)Igneous rocks can't be solely defined by color, although the darker the color the higher the iron content (more mafic). #2) Volcanic rocks exhibit a variety of characteristics, some are glass (obsidian), some are pyroclastic (very porous and appear spongelike) and others (ie columnar basalt) are tubular in shape...volcanic rocks tend to exhibit SMALL crystalline structure, as they did not have a chance to cool and grow LARGER crystals... #3) Depends on the type of rock...if they are sedimentary, then they likely were organic materials that dissolved and were filled in...for others, such as geodes, cavities are allowed to develop through air pockets and water...water plays a VERY significant role in the development of certain rock types... #4) Different densities are explained by two fundamental principles...temperature and pressure...given that the chemical makeup of a rock sample is identical, there can be varying degrees of density based on the temperatures and pressures that a rock is exposed to...the BIG assumption is the chemical makeup...hematite is going to be much more dense than Calcium Feldspar just because Fe makes up hematite and is more dense than Ca ever thought of being!! #6) Unknown..do not understand what this question is referring to?!? #7) Hey...there you go...it's volcanic...it's expelled from a volcano at HIGH speeds and does not have time to cool slowly...because it cools at such a high speed, the crystalline structure is glass like...this has everything to do with rate of cooling!! #8) Density? Pumice is very light and porous...so it's either the density (or lack thereof) or porosity... #9) I'd have to do a little reading to give you the right answer...because it's so porous may make it difficult to determine it's true density... Hope this helps...  |
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55337 Category:(General Advice) Created:(2/15/2004 5:00:00 PM)