Term
| Elements make up(1)________, which in turn make up (2)_________. |
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Definition
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Term
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Definition
| A solid chemical element, or compound (elements chemically bonded) which forms naturally in the earth. |
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Term
| When examining a rock what do geologist initially ask? |
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Definition
1.What minerals does it contain?
2.How are these minerals held together? |
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Term
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Definition
| They are rock foming elements.Make up 99% of the earth's weight Include Oxygen, Silicon, Aluminium, and Iron. |
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Term
| What is the commonest mineral group on earth? |
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Definition
The silicates
(Carbonates are the 2nd- with the commonest mineral being calcite) |
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Term
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Definition
| They are the important economic mineralsWeigh 1% of the earth's crustInclude Gold, Uranium, and Copper. |
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Term
| Minerals form and grow by____________. Describe what happens in this process. |
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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. |
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Term
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Definition
| Overall shape of a crystal. |
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Term
| When discussing crystal habit, describe a tabular crystal. |
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Definition
| Table-top shape like micas |
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Term
| When discussing crystal habit, describe an acicular crystal. |
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Definition
| Long thin needle like crystal |
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Term
| When discussing crystal habit, describe a bladed crystal. |
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Definition
| Long flat blade-shaped crystal |
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Term
| When discussing crystal habit, describe a fibrous crystal. |
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Definition
| thin, fine and hair like. e.g asbestos |
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Term
| When discussing crystal habit, describe a reniform crystal. |
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Definition
| Kidney shape e.g haematite. |
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