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1
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Rocks made up of particles of minerals or rocks
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2
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Naturally occurring solid that can form by inorganic processes and that has a crystal structure
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3
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The look and feel of a rock's surface
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4
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Dark colored rock with low silica content
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5
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Rounded, hollow rock that is often lined with mineral crystals
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7
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20 minerals that makes up most of the rocks of Earth's crust
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8
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Narrow channel or slab of a mineral that is different from the surrounding rock
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16
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Mineral that splits easily along flat surfaces
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17
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Light colored rock with high silica content
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19
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Small, solid pieces of material that comes from rocks or living things
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20
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Rock formed from the cooling of magma or lava
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