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science mid-turm
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| Question | Answer |
|---|---|
| What are strata? | layers of rock. |
| What is sratisfaction? | The process in which sedimentary rocks are arranged in layers. |
| Foilated metamorphic rock. | the texture of metamorphic rock in whick the mineral grains are arranged in planes or bands. |
| mineral | any of a class of substances occurring in nature, usually comprising inorganic substances, |
| element | Chemistry . one of a class of substances that cannot be separated into simpler substances by chemical means. See also chart under periodic table. |
| compound | something formed by compounding or combining parts, elements, etc. |
| crystal | Mineralogy . a solid body having a characteristic internal structure and enclosed by symmetrically arranged plane surfaces, intersecting at definite and characteristic angles. |
| silicate minerals | Silicate is a chemical term for the group of a single atom of silicon surrounded by four atoms of oxygen, or SiO4, in the shape of a tetrahedron |
| nonsilicate minerals | 1. Non-silicates are minerals other than silicate minerals |
| native elements | (geology) Any of 20 elements, such as copper, gold, and silver, which occur naturally uncombined in a nongaseous state; there are three groups—metals, semimetals, and nonmetals. |
| Carbonates...... | salt or ester of carbonic acid. |
| halides | 1. a chemical compound in which one of the elements is a halogen. adjective 2. of, pertaining to, or characteristic of a halide. |
| oxides | "compound of oxygen with another element," 1790, from Fr. oxide (1787), coined by G. de Morveau and A. Lavoisier from ox(ygène) + (ac)ide. See oxygen. |
| sulfides | A compound of bivalent sulfur with an electropositive element or group, especially a binary compound of sulfur with a metal. |
| sulfates | Chemistry . a salt or ester of sulfuric acid. |
| luster | the state or quality of shining by reflecting light; glitter, sparkle, sheen, or gloss: the luster of satin. |
| streak | to mark with a streak or streaks; form streaks on: |
| cleavage | the tendency of crystals, certain minerals, rocks, etc., to break in preferred directions so as to yield more or less smooth surfaces (cleavage planes). |
| fracture | the characteristic appearance of a broken surface, as of a mineral. |
| Density | mass per unit volume. |
| dikes | to enclose, restrain, or protect by a dike: to dike a tract of land. |
| sills | Geology . a tabular body of intrusive igneous rock, ordinarily between beds of sedimentary rocks or layers of volcanic ejecta. |
| batholiths | a large body of intrusive igneous rock believed to have crystallized at a considerable depth below the earth's surface; pluton. |
| stocks | a quantity of something accumulated, as for future use: a stock of provisions. |
| fissures | a narrow opening produced by cleavage or separation of parts. |
| lava plateaus | A volcanic plateau is a plateau produced by volcanic activity. There are two main types: lava plateaus and pyroclastic plateaus. Lava plateau |