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A. Igneous rocks form directly from the ______________________________and ______________________ of ________________ molten rock to form _________________ rock.
B. _______________________________ is the process when a liquid rock cools, and it changes to a solid made of
_______________________________
You must know how to read this chart on page 6 of your ESRT!
2. CLASSIFICATION OF IGNEOUS ROCKS:
2 characteristics that are used to classify igneous rocks___________________________ 2. _____________________________
Texture of an igneous rock describes the size shape and ____________________
of the mineral crystals it was made from.
The _________ of the crystals depends on the ______________________________.
Fast cooling = ______________________________ ( Lava, Extrusive)
3. EXTRUSIVE IGNEOUS ROCKS:
_____________________ occurs when molten (liquid) rock flows out of the earth as ___________ and cools ________________ to form fine or no ________________
To form magma _____________________ must be melted.
Minerals melt at different pressures and temperatures.
Igneous rocks of different _____________, can form from the same body of ________ LAVA = fine grained
4. INTRUSIVE IGNEOUS ROCKS:
________________ occurs when molten rock beneath the surface ________________ and cools _________________ to form __________________________
5. FELSIC: Igneous rocks of the continental crust are rich in ____________ density , _______________ colored minerals.
( ________________ )
6. MAFIC:Igneous rocks of the ocean floor are rich in ________________ density,
Rocks are classified according to the environment in which they _________________ Types of Rocks:________________________ _________________________ OR ______________________
A Metamorphic rock is one whose original form has been ________________ by _____________ and ______________.
This alteration is called ________________________. These changes are NOT caused by MELTING. If the rock melted and cooled it would be an IGNEOUS ROCK.
Changes are caused by ______________________.May include the creation and growth of __________________________.
Rocks which are intensely __________________can also become ______________________ rock, making it more DENSE and RESISTANT. The growth of new minerals may cause the rock to appear ___________________ or _______________ (stripes of light and dark minerals). It can also _________________ (bend) or __________________ original structure.
There are two types of Metamorphism:a. ________________________________________
Regional Metamorphism: Occurs over large areas with extreme pressures and temperatures. The extreme heat and pressure is what builds _____________________.
Contact Metamorphic: Is the zone of contact where an igneous intrusion meets the existing rock but does not melt it. Contact metamorphism occurs only at the place where the magma ________________________ rock and transfers heat via conduction.
2. Bioclastic Sedimentary Rock: are formed by the ___________________________________________________________________________________________________________________________
* Limestone is the accumulation of _______________ and __________________
* Coal is the remains of _____________ that accumulate in layers and become buried and compressed for millions of years!!
3. Crystalline Sedimentary Rocks:Chemical sedimentary rocks are formed from minerals that were _________________
in water. Minerals that were once dissolved are called
__________________________ and ___________________________
Crystalline sedimentary rocks are made of only one _____________________ and are
called ___________________________________
Examples include: ______________________ and ______________________ A fossil is evidence that a rock is ________________________________________.
Fossils are rare in ____________________ and ________________________ rocks.
MINERALS1. Lithosphere is composed of _____________________________
2. Rocks are composed of _________________________________
3. Minerals are composed of _______________________________
The most abundant elements are _____________________ & ___________________
Minerals containing these elements are known as _______________________________ Minerals are ________________________________ ________________________________ ________________________________ ________________________________
Review Questions: Use the back page of your reference tables1. What properties are most important in identifying a mineral?
2. What property causes a mineral to break in a particular pattern?
3. Which mineral would best be used in the manufacture of glass, jewelry and electronics?
4. Which mineral would best be used in the manufacture of cement and polarizing prisms?
5. Which mineral would best be used as a food additive and to melt ice?
6. Describe 3 tests you can use to distinguish colorless halite from colorless calcite:
MINERAL CHARACTERISTICS:LUSTER: Appearance of ___________________ reflected from a minerals surface Metallic: “shiny like a coin” Non-metallic (glassy, waxy, greasy, pearly, earthy, dull)
HARDNESS: Resistance to being ______________________
Moh’s scale of hardness:The scale is from _________ to __________ ( _________________ is the hardest mineral)Larger values will scratch mineral of lower or equal value!Hardness is due to the ______________________________________________________
CLEAVAGE:Some minerals tend to break along one or more smooth surfaces. Cleavage is also due to ______________________________________________________
FRACTURE:When a mineral has no well defined cleavage plane. Breaks in ____________________ jagged surfaces.
COLOR: May be used to identify ____________________ minerals.Many minerals have the ____________________ color.Some minerals come in ____________________ colors.