Science Test for 3/30
Terms
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- What are the two types of color for igneous rocks?
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felsic- light colors
mafic- dark colors - What are the three types of textures for igneous rocks? with a descrption
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aphanitic- tiny crystals (glassy)
phaneritic- crystals are visible to the naked eye
porphyritic- large crystals embedded in a small crystalline matrix - What are the four things that classify a igneous rock?
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origin
texture
color
compostition - How are igneous rocks formed?
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cooling of magma
if the rock is intrusive it will have larger crystal...if extrusive will have smaller cystals - What is the rock cycle?
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Igneous
Metamorphic sedimentary - How is a metamorphic rock formed? and what classifys it?
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formed by heat and pressure
enlargement of crystals and floitated or non foliated classify it - What is foliation and non foliation
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foliation- banded rock mineral are lined up in bands or layers due to the temp. change and density
non- foliation- lack of bands- usually one kind of mineral - How is sedimentary rocks formed and what classifys it?
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formed by weathering and erosion
formation and compoistion classify it - What is clastic and non clastic?
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clastic-rocks made up of fragments of rock or minerals
non-clastic rocks are then called crystalline - What is bioclastic?
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bioclastic- fragments of biological origin, plants, and animals
Cementation-minerals precipitate between grains of sediment
compaction- squeezing air and water our of buried sediments - what is sediment?
- small, solid particles of material from rocks or organisms which are moved by water or wind.
- what are minerals?
- a naturally occuring, inorgainic solid that has a crystal structure and a definite chemcial compostion
- what is weathering and what are the two types?
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weathering is the chemical and physical processes that break down rock are earths surface
chemical- process that breaks dowm rock through chemical changes
mechanical-process of breaking down rock is physically broken into smaller pieces. - what are fossils? and what kind of rocks form them?
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the preserved remains or traces of living things.
formed by sedimentary rocks mostly. - metamorphic rocks
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marble
quartize
schist
slate
graphite
phylite
gneiss - sedimentary rocks
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shale
chert
sandstone (wind and water)
coquina
coal
conglomerate
dolmite
halite (salt) - igneous rocks
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hylite
pumice (density is greater)
basalt
gabbro
obsidian
grantie
scorina