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Classifying Rocks

Across
Is a dark colored rock that has a lower silica content than granite.
Forms when a rock is change by the heat or pressure or by chemical reaction.
Is generally a light colored rock that has high silica content.
Forms from the cooling of magma or lava.
Down
Is the look and feel of a rocks surface.
Forms when a small particles of the rocks or the remain of plants and animals are pressed and cemented together.
Particles of minerals or the other rocks that give a rock its texture.
Any of the common minerals that make up most of the rocks on earth crust