Rocks And The Rock Cycle Flashcards
(26 cards)
Rocks
Solid materials that consists of one or more minerals or other substances
Rocs are able to be classified according to their…
Color, texture, and mineral composition
3 groups of rocks:
Igneous, Sedimentary, and metamorphic
Geologists
A scientist that studies Earth’s history through rocks and rock formations
Igneous rocks are used for…
Monuments and statues as well as building materials used in homes and construction
Sedimentary rocks such as limestone are used for…
Manufacturing chalk or cement; shale can be used to make bricks
Metamorphic rocks are used for…
Building materials, artwork, roofing, and railroad
Igneous rocks are formed from the…
Cooling and hardening of magma or lava
2 types of igneous rocks:
Intrusive and extrusive
Intrusive
Forms from magma that hardens beneath Earth’s surface
Extrusive
Forms from lava that has erupted and cooled on Earth’s surface
Ex. Of igneous rocks
Granite, basalt, obsidian
Sedimentary rocks are formed from…
The compacting and cementing of sediments
Sediments
Small, solid pieces of material that come from rocks or living things
Sedimentary rocks make up…
A very small percentage of Earth’s crust
Ex. Of sedimentary rock
Limestone, conglomerate, sandstone
Metamorphic rocks are formed from…
Extreme heat and pressure
Metamorphic rocks are able to be formed from…
The intense pressure deep under Earth’s surface or collisions of tectonic plates
Metamorphic rocks are able to be formed from…
The extreme heat from magma
Ex of metamorphic rock
Marble, gneiss, slate
Rock Cycle
The process in which rocks are created , changed, destroyed, and formed again
Rock cycle is a…
A continuos process that “recycles” the composition of Earth’s crust
It can take… of years for rocks to change
Million of years
Rocks begin as
Igneous rocks
