rocks
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Magma is a mix of molten rock, gases, and mineral. | true
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| Porphyritic textures indicate that magma has cooled very slowly throughout crystallization. | false slowly, then quickly
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| Sandstone, with abundant quartz and orthoclase feldspar, is among the most durable of igneous rocks. | false, granite
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| Valuable ore deposits are often associated with igneous extrusions. | false, intrusions
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| Different minerals melt and crystallize at different temperatures. | true
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| Igneous rocks can be identified by their physical properties of crystal size and texture. | true
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| Igneous rocks are rarely used as building materials because of their strength, durability, and beauty | false, often
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| Diamonds are sometimes found in igneous intrusions known as kimberlites. | true
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| The continuous changing and reforming of rocks is called graded bedding. | false, rock cycle
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| During physical weathering, minerals remain chemically unchanged. | true
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| During sedimentary rock formation, cementation occurs before weathering | false, after
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| Because of its large mass, coarse-grained clastics such as gravel tend to be transported by low-energy flows of water | false, high energy
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| The characteristic textures and features of metamorphic rocks provide a geologic “snapshot” of surface conditions in Earth’s past. | false sedimentary
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| Regional metamorphism is divided into low grade, intermediate grade, and high grade metamorphism. | true
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| The porosity of sandstone allows it to hold oil, gas, and water. | true
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| Eroded materials are almost always carried uphill. | false downhill
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| Landslides create sorted deposits when sediment moves downhill in a jumbled mass | false, unsorted
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| When the concentration of minerals dissolved in water reaches saturation, crystals precipitate out of solution. | true
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| Sedimentary rocks form from rock and mineral fragments, and metamorphic rocks form from existing rock. | true
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| As the water content of rock increases, the melting point ____. | decreases
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| A model that illustrates the predictable patterns of mineral formation from cooling magma is ______. | Bowen's reaction series
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| Intrusive igneous rocks form _____. | coarse grained rocks
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| Rocks are formed when magma _______. | crystallizes
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| Igneous rocks that cool slowly beneath Earth’s crust are ____. | intrusive
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| Igneous rocks that cool quickly on Earth’s surface are ____. | extrusive
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| Extrusive rocks, which cool more rapidly than intrusive rocks, are generally more ____. | finely grained
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| Factors that affect a rock’s melting point include ____. | pressure and water content
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| Valuable ore deposits and gem crystals are often associated with ____. | igneous intrusions
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| What type of sediment particles have worn surfaces and rounded corners? | clastic
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| What type of bedding has the heaviest and coarsest material is on the bottom? | graded bedding
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| What type of sedimentary rock is coarse-grained with angular fragments? | breccias
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| What results when rocks come in contact with molten rocks such as those in an igneous intrusion? | contact metamorphism
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| The metamorphism of limestone results in the formation of ____. | marble
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| Rock formed from the crystallization of magma is called _________________________. | igneous
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| ___________________________________ illustrates the relationship between cooling magma and mineral formation. | Bowen's reaction series
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| A(n) ____________________ rock, such as dunite, has low silica content and very high iron and magnesium content. | ultramafic
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| A rock that has grains of two different sizes has ____________________ texture. | porphyritic
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| A(n) ____________________ is a vein of extremely large-grained minerals. | pegmatitie
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| A rare, ultramafic rock that might contain diamonds is a(n) ____________________. | kimberlite
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| Much of Earth’s surface is covered not by solid rock, but by ____________________. | sediments
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| Weathering of rock produces worn surfaces and rounded corners that are characteristic of some ____________________ sediment particles. | clastic
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| Landslides, moving water, wind, and glaciers cause ____________________ of surface materials. | erosion
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| _________________________ are characteristic of sediments transported by water and wind. | sorted deposits
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| The primary feature of sedimentary rocks is horizontal layering called ____________________. | bedding
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| The percentage of open spaces between mineral grains in clastic rocks is its ____________________. | porosity
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| The most abundant organic sedimentary rock is calcite-rich ____________________. | limestone
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| Magma that flows out onto Earth's surface | lava
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| Light-colored rock such as granite that has high silica content | felsic rock
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| Dark-colored rock such as gabbro that is rich in iron and magnesium | mafic rock
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| Rock that is very high in iron and magnesium. | ultramfic rock
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| Texture characterized by large, well-formed crystals surrounded by finer-grained crystals of the same mineral. | porphyritic
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| Vein of extremely large-grained minerals | pegamite
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| Ultramafic rock that can contains diamonds. | kimberlite
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| Extrusive rocks, which cool more rapidly than intrusive rocks, are generally more | finely grained
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| Factors that affect a rock’s melting point include | pressure and water content
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| Valuable ore deposits and gem crystals are often associated with | igneous intrusions
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| What type of sediment particles have worn surfaces and rounded corners | clastic
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| What type of bedding has the heaviest and coarsest material is on the bottom | graded
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| What type of sedimentary rock is coarse-grained with angular fragments | breccias
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| What results when rocks come in contact with molten rocks such as those in an igneous intrusion | contact metamorphism
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| The metamorphism of limestone results in the formation of | marble
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Created by:
swalscit
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