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| [image]Polymorphs(-minerals/rocks) |
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Definition
| POLYMORPHS Polymorphs are minerals with the same chemical composition but different crystal structures. |
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INTRUSIVE ROCK
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Igneous rocks which form by the crystallization of magma at a depth within the Earth are called intrusive rocks. |
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| EXTRUSIVE ROCK Any igneous rock derived from magma that is poured out or ejected at the Earth's surface. |
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| TAILINGS The residue of something, esp. ore. |
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| SMELTING Extract (metal) from its ore by a process involving heating and melting: "tin smelting". |
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PLACER MINING
| mining valuable minerals from a placer by washing or dredging. |
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IMPERMEABLE
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Not allowing fluid to pass through: "an impermeable membrane".
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| WATER TABLE The level below which the ground is saturated with water. |
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| RECHARGE ZONE A land area in which water reaches the zone of saturation from surface infiltration, e.g., where rainwater soaks through the earth to reach an aquifer. |
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| RESERVOIR A large natural or artificial lake used as a source of water supply. |
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| RED TIDE A discoloration of seawater caused by a bloom of toxic red dinoflagellates. |
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| CONDUCTION The process by which heat or electricity is directly transmitted through a substance through touch. |
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| CONVECTION The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat. |
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Term
[image]
catalytic converter |
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Definition
CATALYTIC CONVERTER
A device incorporated in the exhaust system of a motor vehicle, containing a catalyst for converting pollutant gases into less harmful ones |
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Term
| [image]thermahaline circulation |
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Definition
| thermahaline circulation - Large-scale circulation in the ocean that transforms low-density upper ocean waters to higher-density intermediate and deep waters and returns those waters back to the upper ocean. |
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