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Rocks Crossword Puzzle

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This is a crossword puzzle all about rocks and their many properties.

  8                         9   10    
                    11   12            
      13       14                     15
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3 Describes fine-grained igneous rock that forms when magma cools quickly at or near Earth's surface.
4 Physical property of some minerals that causes them to break along smooth, flat surfaces.
5 describes metamorpic rick, such as quartzite or marble, whose mineral grains grow and rearrange but generally do not form layers.
6 Rock formed when magma or lava cools and hardens.
7 Describes a type of igneous rock that generally contains large crystals and forms when magma cools slowly beneath Earth's surface.
8 model that describes how rocks slowly change from one form to another through time.
13 When sediments are compacted and cemented together or when minerals form from solutions.
1 Describes the way a mineral reflects light from its surface.
2 Forms when heat, pressure, or fluids act on igneous, sedimentary, or other metamorphic rock to change its form or composition, or both.
9 Measure of how easily a mineral can be scratched.
10 Mixture of one or more minerals, rock fragments, volcanic glass, organic matter, or other natural materials.
11 Color of a mineral when it is in powdered form.
12 Physical property of some minerals that causes them to break with uneven, rough, or jagged surfaces.
14 Naturally occuring inorganic solid that has a definite chemical composition and and orderly internal atomic structure.
15 Loose materials, such as rock fragments, minerals frains, and the remains of once-living plants and animals, that have been moved by wind, water, ice or gravity.
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