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Submarine volcanoes are underwater vents or fissures in the Earth 's surface from which magma can erupt. Many submarine volcanoes are located near areas of tectonic plate formation, known as mid-ocean ridges. The volcanoes at mid-ocean ridges alone are estimated to account for 75% of the magma output on Earth. [1]
Obsidian (/ əbˈsɪdi.ən, ɒb -/ əb-SID-ee-ən ob-) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. [6] Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminum, sodium, and potassium.
Cleaner fish. Cleaner fish are fish that show a specialist feeding strategy [ 1 ] by providing a service to other species, referred to as clients, [ 2 ] by removing dead skin, ectoparasites, and infected tissue from the surface or gill chambers. [ 2 ] This example of cleaning symbiosis represents mutualism and cooperation behaviour, [ 3 ] an ...
Self-cleaning glass. Self-cleaning glass is a specific type of glass with a surface that keeps itself free of dirt and grime. The field of self-cleaning coatings on glass is divided into two categories: hydrophobic and hydrophilic. These two types of coating both clean themselves through the action of water, the former by rolling droplets and ...
A water drop on a lotus surface showing contact angles of approximately 147°. The lotus effect refers to self-cleaning properties that are a result of ultrahydrophobicity as exhibited by the leaves of Nelumbo, the lotus flower. [1] Dirt particles are picked up by water droplets due to the micro- and nanoscopic architecture on the surface ...
Aquarium heater. An aquarium heater is a device used in the fishkeeping hobby to warm the temperature of water in aquariums. [1] Most tropical freshwater and marine aquariums are maintained at temperatures that range from 22 to 30 °C (72 to 86 °F). [1][2][3] The types include glass immersion heaters and undergravel heating. There are also ...
Busser. In North America, a busser, sometimes known as a busboy or busgirl, is a person in the restaurant and catering industry clearing tables, taking dirty dishes to the dishwasher, setting tables, refilling and otherwise assisting the waiting staff. [1][2][3][4][5][6][7][8] Speakers of British English may be unfamiliar with the terms, which ...
Pumice has a porosity of 64–85% by volume and it floats on water, possibly for years, until it eventually becomes waterlogged and sinks. [5] [6] Scoria differs from pumice in being denser. With larger vesicles and thicker vesicle walls, scoria sinks rapidly. The difference is the result of the lower viscosity of the magma that forms scoria.
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