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These visible crystals comprise the whole rock, not just part of it as in a porphyritic, fine-grained igneous rock. … Granite, the most well known example of an intrusive igneous rock, has a phaneritic texture. Sometimes an intrusion of magma that is crystallizing slowly underground releases large amounts of hotRead More →

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Compounds are pure substances that are composed of two or more elements. Substances such as water, salt, and sugar are simple examples of compounds. On the other hand, wood or a piece of marble are not homogeneous and therefore not pure substances or compounds. They are called mixtures. What isRead More →