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Unit 5: Minerals TESSARO

STUDY
PLAY
How many rock forming minerals are there?
20
what determines color of minerals
silica
grain size
coarse grained and fine grained
coarse grained
grains easy to see ex. diorite
fine grained
grains can only be seen with a microscope ex. slate
grain shape
can vary widely ex. rounded in conglomerate and jagged in becca
grain pattern
banded and non banded
banded
grains in layers on bands
nonbanded
grain occur randomly, no pattern ex. quartzite
how rocks form
igneous, sedimentary, and metamorphic
extrusive rocks
from lava ex. basalt or igneous rock that forms from lava on earth's surface; cools faster, smaller crystals
intrusive rocks
from magma ex. granite or igneous rock that forms when magma hardens beneath earth's surface; cools slower, bigger crystals
slow cooling rocks
intrsuive rocks that have large crystals and thus has a chopped up texture ex. porphyry or pegmatite
fast cooling rocks
extrusive rocks that have small crystals and thus a fine grained or glassy texture ex. obsidian or basalt
mineral composition
varies as the composition of the magma and lava vary ex. lots of silica granite(light color) ex. low in silica (dark colored basalt)
uses of hard rocks
hard, dense and durable rocks, used for tools and building materials
pumice uses
used for cleaning
rock-forming minerals
one of the common minerals that make up most of the Earth's crust
granite
a usually light-colored igneous rock that is found in continental rock
basalt
a dark, dense, igneous rock with a fine texture, found in oceanic crust
grains
the particles of minerals or other rocks that give a rock texture
texture
the look and feel of a rock's surface, determined by the size, shape, and pattern of a rock's grains
igneous rock
a type of rock that forms from the cooling of molten rock at or below the surface
sedimentary rock
a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
metamorphic rock
a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions
sediment
small, solid pieces of material that come from rocks or organisms
erosion
the destructive process in which water or wind loosens and carries away fragments of rock
deposition
the process by which sediment settles out of the water or wind this is carrying it
compaction
the process by which sediments are pressed together under their own weight
cementation
the process by which dissolved minerals crystallize and glue particles of sediment together into one mass
chemical rock
sedimentary rock that forms when minerals crystallize from a solution
organic rock
sedimentary rock that forms from remains of organisms deposited in thick layers
chemical rock
sedimentary rock that forms when minerals crystallize from a solution
coral reef
a structure of calcite skeletons built up by coral animals in warm, shallow, ocean water
foliated
term used to describe metamorphic rocks that have grains arranged in parallel layers or bands
rock cycle
a series of processes on the surface and inside earth that slowly changes rock from one kind to another