Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Enrichment
Document related concepts
Transcript
NAME DATE CLASS Chapter 8 Use with Section 2 ENRICHMENT Igneous Rocks Crystallization This chart represents the order in which different minerals crystallize from a cooling magma or lava to form igneous rocks. Both mineral names and the rocks they form are shown. Use the chart to answer the questions. Crystallization First to crystallize Iron-magnesium silicate minerals Feldspar minerals Olivine Plagioclase (calcium feldspar) Decreasing temperature Pyroxene Plagioclase (sodium feldspar) Amphibole Biotite Orthoclase (potassium feldspar) Last to crystallize Rock names Gabbro, basalt Diorite, andesite Granite, rhyolite Quartz 1. Which minerals are the first to crystallize from cooling magma? 2. What kind of rocks are formed by these minerals? 3. Which mineral crystallizes at the lowest temperature? 4. Which mineral, pyroxene or orthoclase, crystallizes from magma first? 5. Which feldspar mineral is found in granite? 6. What minerals form the rocks diorite and andesite? 7. Minerals higher in silica content crystallize from magma at lower temperatures. Which magma, basaltic or granitic, is higher in silica content? 8. Magma low in silica content flows more easily. Which kind of lava, basaltic lava or granitic, flows faster? 20 Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 84 NAME DATE CLASS Chapter 8 Use with Section 2 ENRICHMENT Igneous Rocks Crystallization This chart represents the order in which different minerals crystallize from a cooling magma or lava to form igneous rocks. Both mineral names and the rocks they form are shown. Use the chart to answer the questions. First to crystallize Decreasing temperature Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Crystallization Last to crystallize Iron-magnesium silicate minerals Feldspar minerals Olivine Plagioclase (calcium feldspar) Pyroxene Plagioclase (sodium feldspar) Amphibole Biotite Orthoclase (potassium feldspar) Rock names Gabbro, basalt Diorite, andesite Granite, rhyolite Quartz 1. Which minerals are the first to crystallize from cooling magma? olivine, plagioclase (calcium feldspar) 2. What kind of rocks are formed by these minerals? gabbro, basalt 3. Which mineral crystallizes at the lowest temperature? quartz 4. Which mineral, pyroxene or orthoclase, crystallizes from magma first? pyroxene 5. Which feldspar mineral is found in granite? orthoclase 6. What minerals form the rocks diorite and andesite? amphibole, biotite, plagioclase 7. Minerals higher in silica content crystallize from magma at lower temperatures. Which magma, basaltic or granitic, is higher in silica content? granitic 8. Magma low in silica content flows more easily. Which kind of lava, basaltic lava or granitic, flows faster? basaltic lava 20 Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
