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Chapter Two

QuestionAnswer
mineral A naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition.
Inorganic Not formed from living things or the remains of living things.
crystal A solid in which the atoms are arranged in a pattern that repeats again and again.
streak The color of a mineral's powder.
luster The way a mineral reflects light from its surface.
Mohs hardness scale A scale ranking ten minerals from softest to hardest; used in testing the hardness of minerals.
cleavage A mineral's ability to split easily among flat surfaces.
fracture 1. The way a mineral looks when it breaks apart in a irregular way. 2. A break in a bone.
geode A hollow rock inside which mineral crystals have grown.
crystallization The process by which atoms are arranged to form a material with a crystal structure,
solution A mixture containing a solvent and at least one solute that has the same properties throughout; a mixture in which one substance is dissolved in another.
vein 1. A narrow deposit of a mineral that is sharply different from the surrounding rock . 2. A blood vessel that carries blood back to the heart.
rock-forming mineral Any of the common minerals that make up most of the rocks of Earth's crust.
granite A usually light colored igneous rock that is found in continental crust.
basalt A dark, dense igneous rock with a fine texture, found in oceanic crust.
grain The particles of minerals or other rocks that give a rock its texture.
texture The look and feel of a rock's surface, determined by the size, shape, and pattern of a rock's grains.
igneous rock A type of rock that forms from the cooling of molten rock at or below the surface.
sedimentary rock A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.
metamorphic rock A type of rock that forms when from an existing rock that is changed by heat, pressure, or chemical reactions.
extrusive rock Igneous rock that forms from lava on Earth's surface.
intrusive rock Igneous rock that forms when magma hardens beneath Earth's surface.
Created by: user-1975215
 

 



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