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Vocabulary
What are Igneous Rocks?
How Rocks Melt
Classifying Igneous Rocks
Miscellaneous
100
Magma that flows out onto Earth's surface.
What is Lava.
100
These rocks cool quickly on Earth's surface.
What is Extrusive igneous rocks.
100
When some minerals in a rock melt at lower temperatures and others remain solid, creating a "slush-like" magma.
What is Partial melting.
100
Name the 3 methods characteristics described in this class that are used to classify igneous rocks.
What is Mineral composition, grain size, and texture.
100
_______ ________ are formed from the crystallization of magma.
What is Igneous rocks.
200
Course-grained rocks that cool slowly beneath Earth's surface.
What is Intrusive igneous rocks.
200
____________ increases as you move further into Earth's crust to produce a geothermal gradient.
What is Temperature.
200
As magma cools, minerals crystallize in the _______ (same or reverse) order that they melt.
What is Reverse.
200
Igneous rocks are often used as a resource in ____________.
What is Construction.
200
What 4 factors affect magma formation?
What is Temperature, pressure, water content, and mineral composition.
300
Rocks (like granite) that are light in color and have high silica content.
What is Felsic rocks.
300
As the water content of a rock increases, the melting point of that rock __________.
What is Decreases.
300
Bowen's reaction series illustrates the relationship between _____________ and _____________.
What is Cooling magma and mineral formation.
300
Felsic rocks have ______ silica content, mafic rocks have _____ silica content, and ultramafic rocks have _____ silica content.
What is High, low, and very low.
300
______ is the compound with the greatest effect on magma characteristics.
What is Silica.
400
Process wherein different minerals form at different temperatures.
What is Fractional crystallization.
400
Earth's thermal energy is found in the _______ mantle and the ________ crust.
What is Upper; lower.
400
Name the 3 types of magma.
What is Andesitic, basaltic, and rhyolitic.
400
What 3 ore deposits are found in igneous rocks? Provide an example of each.
What is Veins (precious metals), pegmatites (gems), and kimberlites (diamonds).
400
Grain textures give igneous rocks _______ and make them resistant to __________.
What is Strength; weathering
500
Rocks characterized by large-well formed crystals surrounded by finer-grained crystals of the same mineral or different minerals.
What is Porphyritic texture.
500
Rocks only melt with the perfect combination of ________, ________, and _________.
What is Temperature, pressure, and composition.
500
Continuous reactions result in a _______ change in composition, while discontinuous reactions result in a ______ change in composition.
What is Gradual; abrupt.
500
Differentiate between intrusive and extrusive rocks according to grain size.
What is extrusive, no visible mineral grains; intrusive, large mineral grains
500
Give an example of minerals that undergo continuous and discontinuous crystallization.
What is continuous - Feldspars; discontinuous - Mg-Fe minerals