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a mineral is a kind of solid natural material | 1 |
a mineral usually has a crystal structure | 1 |
rock is made of minerals | 1 |
a mineral is a kind of solid natural material | 1 |
a diamond is made of face-centered cubic crystals | 1 |
a mineral usually has a crystal structure | 1 |
a mineral usually has a crystal structure | 1 |
a quartz is made of six-sided transparent crystals | 1 |
minerals are formed by magma cooling | 1 |
a volcano is a source of magma / lava | 1 |
halite is formed by a body of salt water evaporating | 1 |
seawater is a kind of salt water | 1 |
halite is a kind of mineral | 1 |
the formation of diamonds requires intense pressure | 1 |
the pressure is intense deep below earth 's crust | 1 |
hardness is a property of a material / an object and includes ordered values of malleable / rigid | 1 |
the properties of something can be used to identify that something | 1 |
a mineral is a kind of solid / natural material | 1 |
if an object is made of a material then that object has the properties of that material | 1 |
a rock is a kind of object | 1 |
rock is made of minerals | 1 |
the property of something is the same for the things of same kind | 1 |
a mineral is a kind of solid / natural material | 1 |
color is a property of a material | 1 |
a mineral is a kind of material | 1 |
hardness is a measure of a mineral 's ability to resist scratching | 1 |
an example of breaking something down is scratching something | 1 |
a material that is soft can be broken down by a material that is hard | 1 |
quartz scratches glass easily | 1 |
a quartz is made of six-sided transparent crystals | 1 |
quartz is a kind of mineral | 1 |
mica has a nonmetallic luster | 1 |
a mineral can be scratched by a fingernail | 1 |
mica is a kind of mineral | 1 |
if a mineral can be scratched by a fingernail then that mineral is soft | 1 |
mica is black in color | 1 |
a mineral has a nonmetallic luster | 1 |
if a mineral is black in color | 1 |
mica is soft | 1 |
samples of a single type of mineral usually have the same properties | 1 |
different materials usually have different properties | 1 |
the properties of something can be used to identify / used to describe that something | 1 |
a mineral is a kind of material | 1 |
rocks often contain large amounts of metal | 1 |
aluminum is a kind of metal | 1 |
iron is a kind of metal | 1 |
class is a property of a rock and includes values of sedimentary / metamorphic / igneous | 1 |
sedimentary rocks are formed by deposition / cementation | 1 |
metamorphic rocks are formed by rocks being exposed to extreme heat and pressure | 1 |
class is a measure of how a rock is formed | 1 |
limestone is a kind of sedimentary rock | 1 |
marble is a kind of metamorphic rock | 1 |
granite contains mica | 1 |
feldspar is a kind of mineral | 1 |
mica is a kind of mineral | 1 |
granite contains feldspar | 1 |
quartz is a kind of mineral | 1 |
granite is a kind of rock | 1 |
granite contains quartz | 1 |
different classes of rocks are formed by different methods | 1 |
class is a measure of how a rock is formed | 1 |
the origin of a rock means the method by which a rock is formed | 1 |
the radioactive isotope content of a rock means the amount of elemental isotopes of the parent isotopes | 1 |
radiometric dating is used to identify / determine the absolute age of the rock | 1 |
the absolute age of a rock is the amount of time passed since a rock was formed | 1 |
radiometric dating is a kind of method to determine the absolute age of the rock | 1 |
calculating the age of rocks requires investigating the original amount of the elemental isotopes of the parent isotopes | 1 |
the formation of organic rocks is usually found in the ocean | 1 |
the surface of the earth is made of 70% ocean | 1 |
most means over 50% of something | 1 |
the hydrosphere is a thin layer of water covering the earth 's surface | 1 |
if granite is broken down into sediment | 1 |
formation in the rock cycle means an old class of rocks changes into a new class of rocks | 1 |
the sediment from the granite is buried and compacted | 1 |
the formation of sedimentary rock is a sequential process, with stages of weathering, erosion, deposition,burying, compaction | 1 |
if something is a stage in a process then that something is required for that process | 1 |
sedimentary rocks are formed by sediment / materials that settle compacting / cementing together | 1 |
in the formation of sedimentary rock , burying the sediments follows depositing the sediments | 1 |
metamorphic rocks are formed by rocks being exposed to extreme heat and pressure | 1 |
sedimentary rock is a kind of rock | 1 |
magma is extremely high in temperature | 1 |
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 | 1 |
metamorphic rocks do not contain fossils | 1 |
nearly all fossils are found in sedimentary rock | 1 |
if something is found in something else then that something else contains that something | 1 |
sedimentary is a class of rock | 1 |
metamorphic is a class of rock | 1 |
formation in the rock cycle means an old class of rocks changes into a new class of rocks | 1 |
if fossils are destroyed in rock transition , then there will be gaps in the fossil record | 1 |
heat is a kind of energy | 1 |
change is a kind of process | 1 |
exposure to extreme heat and pressure changes igneous rock into metamorphic rock | 1 |
igneous rocks are formed by lava cooling | 1 |
pumice is formed when lava cools | 1 |
if something usually happens then that something is likely to happen | 1 |
igneous rocks / minerals are formed by magma / lava cooling / crystallizing | 1 |
if something is formed by a material changing then that something is formed from that material | 1 |
a volcano is a source of magma / lava | 1 |
usually something can be found near a source in greater concentrations | 1 |
cooling is a kind of change | 1 |
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