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Chapter 5: Igneous Rocks

NAME: ______________________________
DATE: _______________________________
Points: 14
Across
Magma that flows out onto Earth's surface.
Rare, ultramafic rock that can contain diamonds and other minerals formed only under very high pressure.
Light-colored, have high silica contents, and contain mostly quartz, potassium feldspar, and plagioclase feldspar.
Large, well-formed crystals surrounded by finer, grained crystals of the same mineral or different minerals.
The first minerals that crystallize from magma are the last minerals that melted during partial melting.
Magma that cools and crystallizes above Earth's surface.
Process where some minerals melt at relatively low temperatures while other remain solid.
Veins of extremely large-grained minerals.
Down
Refers to the size, shape, and distribution of the crystals or grains that make up a rock.
Dark-colored, have lower silica contents, and contain mostly plagioclase and pyroxene.
As magma cools and crystallizes, minerals form in predictable patterns.
Thick lava that prevents gas bubbles from escaping, holes called vesicles are left behind; Spongy Appearance.
Magma cools and crystallizes below Earth's surface.
Rocks that are formed when molten material cools and crystallizes.