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Science Rocks/Stuff

texture the look and feel of the rock's surface
grains particles of minerals or other suface
What do geologist study when trying to identify a rock sample? they study its color texture and ditermine its mineral compostion
What are the three major rock groups? Igneous rocks, Sedimentary rocks, metamorphic rocks
Large Grain Coarse
Small Grain Fine-grained
Shape: Mineral Crystals Crystalline
Shape: Rock Fragments Rounded or Jagged
Pattern: Layered Banded
Pattern: Random Grains nonbanded
No crystal Grains smooth, glassy
Name the three major groups of rock and discribe how they are formed Igneous- lava, Sedimentary- different peices of other rocks, Metamorphic- deep in the crust
What tests do geologists use to identify minerals in rocks? they cut a peice of the rock and look at it under a microscope, acid, break it, magnets
the look and feel of a rocks surface is its _______. texture
The particles of minerals or other rocks that make up a rock are called _________. grains
Slow cooling of magma far beneath Earth's surface coarse grained, large crystal
Magma cooling in two stages, first slowly then quickly Porphyritic
Extremely rapid cooling of lava in which no crystals form Glassy- no crystals
Rapid cooling of lava in which tiny crystals form fine grained, small crystals
Explain how the silica content of molten materials affects the color of Igneous rocks High silica= light color, low silica= dark color
What qualities of igneous rocks have long made them useful for tools and building materials hard, dense, durible
Describe one use for each igneous rocks granite, basalt, and pumice granite- statues, decoration, counters Basalt- construction, pumice- cleaning and polishing
Igneous rock formed from lava on Earth's surface is called ________ rock extrusive
A rock with largee crystals scattered on a blackground of much smaller crystals has a(n)_________ texture. porphyritic
Igneous rock formed from magma below Earth's surface is called_________ rock. intrusive
Prossess that forms sedimentary rock erosion -> deposition -> compaction -> cementation
Sandstone, Conglomerate, Breccia, Shale Clastic
Limestone made from shells, coal Organic
Loimestone made from precipitated calcite, rock salt Chemical
erosion the process in which running water, wind, or ice loosen and carry away rock fragments
clastic rock sedimentary rock that forms when rock rock fragments are squeezed together
sediment small, solid peices of material from rocks or living things
cementation the process in which dissolved minerals crystalize and glue sediments together
organic rock sedimentary rock that forms from the remains of plants or animals
compaction the process that presses sediments together
chemical rock sedimentary rock that forms when minerals dissolved in a solution crystallize
deposition the process by which sediment settles out of wind or water
Collisions between Earth's plates push rock down toward the heat of Earth's _______. Mantle
As the rock is buried deeper ini the crust, ________ also increases on the rock. pressure
The rock is squeezed so tightly that the _____ of the rock change, creating metamorphic rock. grain
What characteristics do geologists use to classify metamorphic rocks? The arragement of the grains that make up the rock, layers=foileated no layers=non-foliated
non-foliated marble
foliated slate, gneiss
Created by: lalaland462