Earth science - Igneous rocks chapter 5 - section 5.1 study guide
Terms in this set (21)
Molten rock inside earths crust
This type of rock is formed from the crystallization of magma.
Magma that flows out of earths surface
Magma that has a low silica content
Magma that has highest silica content
True or false...Magma is often a slushy mix of molten rock, gases, and mineral crystals.
The elements found in magma are quite different from those found in earths crust. T or F ?
Silica is the most abundant (biggest) compound found in magma. T or f?
Magmas are classified as basaltic, andesitic or rhyolitic. T or f?
In the laboratory, rocks must be heated from 8000 degrees C to 12000 degrees C before they melt. T or f?
Heat in the upper mantle and lower crust may come, in part, from the decay of radioactive elements. T or f?
Because different minerals have different __________ ____________ not all parts of rock melt at the same time.
Process whereby some minerals melt at low temperatures while other minerals remain solid is called _______________ ______________
As each group of minerals melt, different ______________ are added to the magma mixture changing its composition.
When magma cools, it crystallizes in the ______ order of partial melting.
Process where different minerals form at different temperatures.
As each group of minerals crystallizes it removes elements from the remaining _________ instead of adding new elements.
The first feldspar to form are rich in what mineral?
The second feldspar to form are rich in what mineral?
Crystallizes while the last liquid portion of magma is squeezed into rock fractures.sio 2 crystallites
How is Quartz formed?
Magma cools rapidly (fast)
What causes a zoned crystal?