sentences
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a mineral is a kind of solid natural material
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a mineral usually has a crystal structure
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rock is made of minerals
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a mineral is a kind of solid natural material
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a diamond is made of face-centered cubic crystals
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a mineral usually has a crystal structure
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a mineral usually has a crystal structure
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a quartz is made of six-sided transparent crystals
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minerals are formed by magma cooling
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a volcano is a source of magma / lava
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halite is formed by a body of salt water evaporating
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seawater is a kind of salt water
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halite is a kind of mineral
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the formation of diamonds requires intense pressure
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the pressure is intense deep below earth 's crust
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hardness is a property of a material / an object and includes ordered values of malleable / rigid
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the properties of something can be used to identify that something
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a mineral is a kind of solid / natural material
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if an object is made of a material then that object has the properties of that material
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a rock is a kind of object
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rock is made of minerals
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the property of something is the same for the things of same kind
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a mineral is a kind of solid / natural material
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color is a property of a material
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a mineral is a kind of material
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hardness is a measure of a mineral 's ability to resist scratching
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an example of breaking something down is scratching something
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a material that is soft can be broken down by a material that is hard
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quartz scratches glass easily
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a quartz is made of six-sided transparent crystals
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quartz is a kind of mineral
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mica has a nonmetallic luster
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a mineral can be scratched by a fingernail
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mica is a kind of mineral
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if a mineral can be scratched by a fingernail then that mineral is soft
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mica is black in color
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a mineral has a nonmetallic luster
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if a mineral is black in color
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mica is soft
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samples of a single type of mineral usually have the same properties
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different materials usually have different properties
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the properties of something can be used to identify / used to describe that something
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a mineral is a kind of material
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rocks often contain large amounts of metal
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aluminum is a kind of metal
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iron is a kind of metal
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class is a property of a rock and includes values of sedimentary / metamorphic / igneous
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sedimentary rocks are formed by deposition / cementation
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metamorphic rocks are formed by rocks being exposed to extreme heat and pressure
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class is a measure of how a rock is formed
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limestone is a kind of sedimentary rock
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marble is a kind of metamorphic rock
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granite contains mica
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feldspar is a kind of mineral
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mica is a kind of mineral
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granite contains feldspar
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quartz is a kind of mineral
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granite is a kind of rock
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granite contains quartz
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different classes of rocks are formed by different methods
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class is a measure of how a rock is formed
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the origin of a rock means the method by which a rock is formed
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the radioactive isotope content of a rock means the amount of elemental isotopes of the parent isotopes
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radiometric dating is used to identify / determine the absolute age of the rock
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the absolute age of a rock is the amount of time passed since a rock was formed
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radiometric dating is a kind of method to determine the absolute age of the rock
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calculating the age of rocks requires investigating the original amount of the elemental isotopes of the parent isotopes
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the formation of organic rocks is usually found in the ocean
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the surface of the earth is made of 70% ocean
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most means over 50% of something
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the hydrosphere is a thin layer of water covering the earth 's surface
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if granite is broken down into sediment
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formation in the rock cycle means an old class of rocks changes into a new class of rocks
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the sediment from the granite is buried and compacted
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the formation of sedimentary rock is a sequential process, with stages of weathering, erosion, deposition,burying, compaction
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if something is a stage in a process then that something is required for that process
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sedimentary rocks are formed by sediment / materials that settle compacting / cementing together
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in the formation of sedimentary rock , burying the sediments follows depositing the sediments
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metamorphic rocks are formed by rocks being exposed to extreme heat and pressure
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sedimentary rock is a kind of rock
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magma is extremely high in temperature
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if something that contains a thing is changed into something else that doesn't contain that thing, then that thing is lost / destroyed when that something changes into that something else
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metamorphic rocks do not contain fossils
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nearly all fossils are found in sedimentary rock
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if something is found in something else then that something else contains that something
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sedimentary is a class of rock
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metamorphic is a class of rock
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formation in the rock cycle means an old class of rocks changes into a new class of rocks
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if fossils are destroyed in rock transition , then there will be gaps in the fossil record
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heat is a kind of energy
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change is a kind of process
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exposure to extreme heat and pressure changes igneous rock into metamorphic rock
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igneous rocks are formed by lava cooling
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pumice is formed when lava cools
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if something usually happens then that something is likely to happen
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igneous rocks / minerals are formed by magma / lava cooling / crystallizing
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if something is formed by a material changing then that something is formed from that material
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a volcano is a source of magma / lava
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usually something can be found near a source in greater concentrations
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cooling is a kind of change
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