Thursday, November 24, 2011

Can someone help me with a few earth science questions?? EASY TEN POINTS!?

I need help with a few earth science questions! First person to help me with this question with some correct answers will receive the ten points!! (: THANKS!








Multiple Choice


1.An igneous rock that forms after rapid cooling above the earth锟絪 surface is characterized by


A.small crystals or no crystallization at all


B.large, well-defined crystals


C.many small crystals embedded within larger one





2.Which two terms below BOTH describe the igneous rock granite?


A.felsic and extrusive


B.ultramafic and intrusive


C.felsic and intrusive





3.Scientists know that the rocks in the Sierra Nevada Mountain range are made mostly of a granite batholith. Which of the following statements must be true about these rocks?


A.The rocks in the Sierra Nevada Mountains are younger than the surrounding rocks.


B.The rocks formed deep within the earth long ago and have been exposed to Earth's surface through erosion and continental uplift.


C.The rocks are volcanic in origin and formed when the area was once covered with extensive volcanoes.





True or False





Aphanitic rocks are also called volcanic rocks.











Help would be AMAZING!? (: thanks!|||Answers:


1) A (small crystals or no crystallization at all)


2) C (felsic and intrusive)


3) Either B or C (strongly leaning towards C though)


True: Aphanitic rocks ARE also called volcanic rocks.|||1. A





2. C





3. B





True.....To an extent. Aphanitic is not a synonym for volcanic, however most volcanic rocks have an aphanitic texture. The term aphanitic describes the texture of the rock. The term volcanic means it erupts at the Earth's surface. The answer to this question really depends on how sophisticated and knowledgeable your teacher is who made it up.

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