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PCS Earth Science

Chapter 5 Review

QuestionAnswer
What is the type of rock that forms when molten material cools and crystallizes? igneous
What consists of molten rock, dissolved gases, and mineral crystals? magma
Magma is classified as basaltic, andesitic, or rhyolitic, based on the amount of _________ it contains. silica
Different minerals melt and crystallize at (same/different) temperatures. different
Classification of igneous rocks is based on what? mineral composition, crystal size, and texture
What does the rate of cooling determine? crystal size
What occurs in pegmatites? ores
Where occurs in kimberlites? diamonds
Why are igneous rocks used as building materials? strength, durability, and beauty
Gases escape from ________ as it flows out onto Earth's surface. lava
______________ describes the order in which minerals crystallize. Bowen's reaction series
_________ forms deep beneath Earth's crust. magma
What is an igneous texture characterized by large crystals embedded in a fin-grained background called? porphyritic
Ingneous rocks that form under conditions of fast cooling are said to be ____________. extrusive
Light-colored rocks with large crystals are said to be ___________. granitic
Which is the first mineral to form in cooling magma? olivine
Which common rock is formed from the solidification of molten material? rhyolite
Rocks are classified as igneous, sedimentary, or metamorphic based primarily on their _____________. method of formation
Which three minerals are most commonly found in the igneous rock granite? plagioclase feldspar, potassium feldspar, and quartz
Created by: Ms.Sala
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