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science
chapter 4:Rocks
question | answer |
---|---|
about __ minerals make up make up most of earth's crust. these minerals are known as _______ _______,___________ | rock-forming minerals |
a rocks color provides clues to the rocks________ ________. | mineral composition |
geologists observe the _______ and the ________ of crystals in a rock to identify the minerals that the rock contains. | shape and color |
most rock are made up od particles of minerals or other ocks which geologist call___________. ________ give the rock texture. | grains |
________ is the look and felling of the rocks surface | texture |
igneous rocks form from ________ and ________ | magma and lava |
igneous rocks are classified according to their__________,___________ and _________ __________ | origin texture and mineral composition |
___________ igneous rocks is formed from lava the erupted onto the earth's surface | extrusive |
___________ igneous rocks is formed from magma that hardened beaneath earth's surface | intrusive |
people through out history have used igneous rocks for _______ and ________ _________ | tools and building materials |
examples of ignous rocks are ________,_________,_________ and _________ | basalt granite obsidian and pumice |
sedimentary rock forms when particles of other rocks or the remains of plants and animals are _________ and _________ together. | pressed and cemented |
most sedimentary rocks are formed through a series od processes ________,_______ ______ and ________ | erosion deposition compaction and cementation |
when studying a rock sample geologists observe the rocks _______,________,_________ | mineral composition,color,texture |
____ are made up of mixtures of minerals and other materials | rocks |