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Details Title: GCSE Geology Description: Minerals Total Flash Cards: 14 Created: 04/25/2006 13:51:03	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Elements make up(1)________, which in turn make up (2)_________. Definition 1.Minerals 2.Rocks Term What is a mineral? Definition A solid chemical element, or compound (elements chemically bonded) which forms naturally in the earth. Term When examining a rock what do geologist initially ask? Definition 1.What minerals does it contain? 2.How are these minerals held together? Term Discuss major elements. Definition They are rock foming elements. Make up 99% of the earth's weight Include Oxygen, Silicon, Aluminium, and Iron. Term What is the commonest mineral group on earth? Definition The silicates (Carbonates are the 2nd- with the commonest mineral being calcite) Term Discuss minor elements. Definition They are the important economic minerals Weigh 1% of the earth's crust Include Gold, Uranium, and Copper. Term Minerals form and grow by____________. Describe what happens in this process. Definition Crystallisation Minerals arrange themselves symmetrically and bond together in definite pattern. Because of their regular internal structure, they usually have a regular external shape. Term What does habit mean? Definition Overall shape of a crystal. Term When discussing crystal habit, describe a tabular crystal. Definition Table-top shape like micas Term When discussing crystal habit, describe an acicular crystal. Definition Long thin needle like crystal Term When discussing crystal habit, describe a bladed crystal. Definition Long flat blade-shaped crystal Term When discussing crystal habit, describe a fibrous crystal. Definition thin, fine and hair like. e.g asbestos Term When discussing crystal habit, describe a reniform crystal. Definition Kidney shape e.g haematite.