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Earth Science Ch 10

classifying rocks

QuestionAnswer
three major types of rocks metamorphic, igneous, sedimentary
the study of rock petrology
what is solid material that is a combination of minerals rocks
Where lava comes from interior of earth
rock made of small pieces of eroded rock sedimentary rock
rock made of hardened lava or magma igneous rock
rock made when rock is changed by heat or pressure metamorphic rock
tests that do not work well when trying to determine what a rock is made of streak and hardness
why do streak and hardness not work well when trying to determine what a rock is made of because rock is a mixture of minerals so these tests may show combination of minerals instead of individual minerals
rocks are a mixture of these minerals
What quality is used to classify rocks texture
what is the term for how rocks look and feel texture
term for individual pieces of rock grains
term used when grains of rock are visible without being enlarged course-grained
term used when grains of rock are visible only with magnification fine-grained
where does new igneous rock come from volcanoes
when do old-earth scienctists think the first igneous rock got on earth at the beginning when earth's crust began to cool and harden
when do young-earth scientists think the first igneous rock got on earth when God made it
Which days was igneous rock probably formed days 1-3
young-earth scientists believe the starting point for all major tectonic activity was the flood
igneous rock will probably have larger crystals if it cooled slower
igneous rock that usually forms slowly underground intrusive
igneous rocks with smaller crystals usually cool faster
igneous rocks that usually have smaller crystals and form above ground extrusive
sometimes grain size is not determined by where rock is formed but by the original magma
an igneous rock with large mineral grains coarse-grained
an igneous rock with small mineral grains fine-grained
a type of rock with sharp edges and is sponge-like scoria
a rock with so many gas bubbles it floats pumice
a glassy looking rock obsidian
another name for obsidian volcanic glass
uses for igneous rocks statues, monuments, and gravestones
rocks made when eroded pieces of rock stick together sedimentary
old-earth scientists believe that erosion and sedimentation have always happened at the speed they happen today
young-earth scientists believe that most rock layers seen today were made by the flood
the first step to sedimentary rock forming rock eroding or being dissolved
the event that caused an enormous amound of erosion flood
a step in forming sedimentary rock in which the sediment is pushed more closely together compaction
s step in forming sedimentary rock in which the sediment is glued together cementation
a type of sedimentary rock made of eroded pieces of other rock clastic
the coarsest clastic rock conglomerate
a type of conglomerate rock made of smooth, round grains sandstone
nonclastic sedimentary rocks is also called chemical sedimentary rock
the process where solids fall to the bottom of a solution because the solution can no longer hold that much solid precipitation
two types of rocks made by precipitation limestone and halite
what are organic nonclastic sedimentary rock made of shells or skeletons
The Egyptian pyramids are made of limestone
limestone is used in cement and brick mortar
another name for halite is rock salt
rocks that were originally another type of rock but are changed by heat or pressure are metamorphic rocks
term for the original rocks that get changed by heat or pressure source rocks
term for magma changing a rock by heating or compressing it contact metamorphism
rocks formed when pressure acts on them in mostly one direction foliated
rock formed when pressure acts on it evenly from all sides nonfoliated
two types of metamorphic rock marble and quartzite
Created by: user-1976193
 



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