rocks Word Scramble

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Question	Answer
Which rock is only formed by regional metamorphism?	Slate
Wavy bands of light and dark minerals visible in gneiss bedrock probably formed from the	heat and pressure during metamorphism
Which sedimentary rock is most likely to be changed to slate during regional metamorphism?	Shale
The rock shown below has foliated texture and contains the minerals amphibole, quartz and feldspar arranged in coarse-grained bands	gneiss
Which physical characteristic best describes the rock phyllite?	Foliated texture with microscopic mica crystals
Which rock is foliated shows mineral alignment but not banding and contains medium-sized grains of quartz and pyroxene?	Schist
Which sequence of change in rock type occurs as shale is subjected to increasing heat and pressure?	shale-slate-phyllite-schist-gneiss
Which type of rock most likely formed in zone A?	marble
What kind of rocks does the complaining rock collector want?	regionally metamorphosed rocks
Particles of sediment collected from a lake bottom average 1.2 centimeters in diameter. If left on the lake bottom to become buried by more sediment and compressed into rock, these particles would form	conglomerate
Which land-derived sedimentary rock could have formed by the compaction and cementation of particles smaller than 0.0003 centimeters in diamteter?	shale
Which type of rock is represented by the map symbol below?	chemically formed sedimentary rock that consists mainly of the mineral calcite
Which characteristic determines whether a rock is classified as shale, a siltstone, a snastone or a conglomerate?	the particle size of the sediments within the rock
Which sequence of events occurs in the formation of a sedimentary rock?	Source material eroded- sediments deposited-sediments compacted and cemented
What do each of these areas of mineral deposits have in common?	They were once covered by evaporating seas
Limestone, gypsum and salt are rocks formed by the processes of	evaporation and precipitation
Which process could lead directly to the formation of pumice rock?	explosive eruption of lava from a volcano
Which process is necessary for the formation of igneous rocks?	solidification
Which characteristics provides the best evidence that obsidian rock formed in an extrusive environment	noncrystalline glassy texture
Igneous rocks	from cooling and solidfication of lava or magma
Intrusive rocks	magma cools slowly, large crystals form
Extrusive rocks	lava cools quickly, small or no crystals form, may be vesicular and contains air bubbles
Sedimentary rocks	Generally form from the compaction and cementation of sediments
Clastic rocks	compacted sediment, classified by size
Organic crystalline	evaporates, precipitates and biological matter
Metamorphic rock	rocks are changed as a result of exposure to intense heat or pressure
Contact metamorphism	heat
Regional metamorphism	pressure
Rocks are classified into three different groups depending on	how they form ( origin )
Magma	lava that stays underground / melted rock underground
lava	lava that shoots out from the volcano
Intrusive igneous rocks	form from magma that cools down slowly under the ground. The slower the magma cools down the larger the intergrown crystals become
Extrusive rocks	Rocks that form when lava exits the earth and cools very quickly at the surface
Sedimentary rocks form from the	compaction and cementation of particles of rocks and sediments
Clastic sed. Rocks	from when particles are compacted and cemented togther
Clastic rocks are grouped / classified according to	size of the sediment particles in the rock
Chemical Sed. Rocks	Form when water evaporates and leaves mineral crystals behind or when crystals form in water
Bioclastic Sed. Rocks	Form from orgaince matter and or contains remnants of living things
Metamorphic rocks	form from the re-crystallization of unmelted rock material under intense heat and or pressure
Regional Meta. Rocks	Large regions under intense heat and or pressure become metamorphic
Contact Meta Rocks	forms at the interface between magma and surrounding rock underground

Created by: manie