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244629 | https://en.wikipedia.org/wiki/Scientific%20law | Scientific law | Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. The term law has diverse usage in many cases (approximate, accurate, broad, or narrow) across all fields of natural science (physics, chemistry, astronomy, geoscience,... | Physical sciences | Basics | null |
244680 | https://en.wikipedia.org/wiki/Multiple%20cropping | Multiple cropping | In agriculture, multiple cropping or multicropping is the practice of growing two or more crops in the same piece of land during one year, instead of just one crop. When multiple crops are grown simultaneously, this is also known as intercropping. This cropping system helps farmers to double their crop productivity and... | Technology | Agriculture_2 | null |
244878 | https://en.wikipedia.org/wiki/Winter%20storm | Winter storm | A winter storm is an event in which wind coincides with varieties of precipitation that only occur at freezing temperatures, such as snow, mixed snow and rain, or freezing rain. In temperate continental and subarctic climates, these storms are not necessarily restricted to the winter season, but may occur in the late a... | Physical sciences | Storms | Earth science |
244905 | https://en.wikipedia.org/wiki/Lauraceae | Lauraceae | Lauraceae, or the laurels, is a plant family that includes the true laurel and its closest relatives. This family comprises about 2850 known species in about 45 genera worldwide. They are dicotyledons, and occur mainly in warm temperate and tropical regions, especially Southeast Asia and South America. Many are aromati... | Biology and health sciences | Laurales | Plants |
244980 | https://en.wikipedia.org/wiki/Chromista | Chromista | Chromista is a proposed but polyphyletic biological kingdom, refined from the Chromalveolata, consisting of single-celled and multicellular eukaryotic species that share similar features in their photosynthetic organelles (plastids). It includes all eukaryotes whose plastids contain chlorophyll c and are surrounded by ... | Biology and health sciences | Bikonts | Plants |
244992 | https://en.wikipedia.org/wiki/Oomycete | Oomycete | The Oomycetes (), or Oomycota, form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms within the Stramenopiles. They are filamentous and heterotrophic, and can reproduce both sexually and asexually. Sexual reproduction of an oospore is the result of contact between hyphae of male antheridia and f... | Biology and health sciences | SAR supergroup | Plants |
245138 | https://en.wikipedia.org/wiki/Loess | Loess | A loess (, ; from ) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of Earth's land area is covered by loesses or similar deposits.
A loess is a periglacial or aeolian (windborne) sediment, defined as an accumulation of 20% or less of clay with a bala... | Physical sciences | Sedimentology | Earth science |
245146 | https://en.wikipedia.org/wiki/Bowfin | Bowfin | The bowfin (Amia calva) is a ray-finned fish native to North America. Common names include mudfish, mud pike, dogfish, grindle, grinnel, swamp trout, and choupique. It is regarded as a relict, being one of only two surviving species of the Halecomorphi, a group of fish that first appeared during the Early Triassic, aro... | Biology and health sciences | Holosteans | Animals |
245159 | https://en.wikipedia.org/wiki/Castor%20%28star%29 | Castor (star) | Castor is the second-brightest object in the zodiac constellation of Gemini. It has the Bayer designation α Geminorum, which is Latinised to Alpha Geminorum and abbreviated Alpha Gem or α Gem. With an apparent visual magnitude of 1.58, it is one of the brightest stars in the night sky. Castor appears singular to the na... | Physical sciences | Notable stars | Astronomy |
245206 | https://en.wikipedia.org/wiki/Plus%20and%20minus%20signs | Plus and minus signs | The plus sign () and the minus sign () are mathematical symbols used to denote positive and negative functions, respectively. In addition, represents the operation of addition, which results in a sum, while represents subtraction, resulting in a difference. Their use has been extended to many other meanings, more or ... | Mathematics | Basics | null |
245307 | https://en.wikipedia.org/wiki/Treeswift | Treeswift | Treeswifts or crested swifts are a family, the Hemiprocnidae, of aerial near passerine birds, closely related to the true swifts. The family contains a single genus, Hemiprocne, with four species. They are distributed from India and Southeast Asia through Indonesia to New Guinea and the Solomon Islands.
Treeswifts are... | Biology and health sciences | Apodiformes | Animals |
245364 | https://en.wikipedia.org/wiki/Ophidiiformes | Ophidiiformes | Ophidiiformes is an order of ray-finned fish that includes the cusk-eels (family Ophidiidae), pearlfishes (family Carapidae), viviparous brotulas (family Bythitidae), and others. Members of this order have small heads and long slender bodies. They have either smooth scales or no scales, a long dorsal fin and an anal f... | Biology and health sciences | Fishes | null |
245432 | https://en.wikipedia.org/wiki/Protoplanetary%20disk | Protoplanetary disk | A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may not be considered an accretion disk; while the two are similar, an accretion disk is hotter and spins much faster. It is also found on bl... | Physical sciences | Stellar astronomy | Astronomy |
245434 | https://en.wikipedia.org/wiki/Proplyd | Proplyd | A proplyd, short for ionized protoplanetary disk, is an externally illuminated photoevaporating protoplanetary disk around a young star. Nearly 180 proplyds have been discovered in the Orion Nebula. Images of proplyds in other star-forming regions are rare, while Orion is the only region with a large known sample due t... | Physical sciences | Stellar astronomy | Astronomy |
245466 | https://en.wikipedia.org/wiki/Sheaf%20%28mathematics%29 | Sheaf (mathematics) | In mathematics, a sheaf (: sheaves) is a tool for systematically tracking data (such as sets, abelian groups, rings) attached to the open sets of a topological space and defined locally with regard to them. For example, for each open set, the data could be the ring of continuous functions defined on that open set. Such... | Mathematics | Algebra | null |
245552 | https://en.wikipedia.org/wiki/Gaussian%20function | Gaussian function | In mathematics, a Gaussian function, often simply referred to as a Gaussian, is a function of the base form
and with parametric extension
for arbitrary real constants , and non-zero . It is named after the mathematician Carl Friedrich Gauss. The graph of a Gaussian is a characteristic symmetric "bell curve" shape. T... | Mathematics | Specific functions | null |
245586 | https://en.wikipedia.org/wiki/Protoplanet | Protoplanet | A protoplanet is a large planetary embryo that originated within a protoplanetary disk and has undergone internal melting to produce a differentiated interior. Protoplanets are thought to form out of kilometer-sized planetesimals that gravitationally perturb each other's orbits and collide, gradually coalescing into th... | Physical sciences | Planetary science | Astronomy |
245794 | https://en.wikipedia.org/wiki/Salyut%201 | Salyut 1 | Salyut 1 (), also known as DOS-1 (Durable Orbital Station 1), was the world's first space station. It was launched into low Earth orbit by the Soviet Union on April 19, 1971. The Salyut program subsequently achieved five more successful launches of seven additional stations. The program's final module, Zvezda (DOS-8), ... | Technology | Crewed vehicles | null |
245926 | https://en.wikipedia.org/wiki/Self-driving%20car | Self-driving car | A self-driving car, also known as a autonomous car (AC), driverless car, robotaxi, robotic car or robo-car, is a car that is capable of operating with reduced or no human input. Self-driving cars are responsible for all driving activities, such as perceiving the environment, monitoring important systems, and controlli... | Technology | Motorized road transport | null |
245963 | https://en.wikipedia.org/wiki/Distributed%20generation | Distributed generation | Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to as distributed energy resources (DER).
Conventional power stations, such... | Technology | Electricity transmission and distribution | null |
245973 | https://en.wikipedia.org/wiki/Mouth%20ulcer | Mouth ulcer | A mouth ulcer (aphtha), or sometimes called a canker sore or salt blister, is an ulcer that occurs on the mucous membrane of the oral cavity. Mouth ulcers are very common, occurring in association with many diseases and by many different mechanisms, but usually there is no serious underlying cause. Rarely, a mouth ulce... | Biology and health sciences | Types | Health |
245982 | https://en.wikipedia.org/wiki/Buoyancy | Buoyancy | Buoyancy (), or upthrust is a net upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus, the pressure at the bottom of a column of fluid is greater than at the top of the... | Physical sciences | Fluid mechanics | null |
245990 | https://en.wikipedia.org/wiki/Commutative%20algebra | Commutative algebra | Commutative algebra, first known as ideal theory, is the branch of algebra that studies commutative rings, their ideals, and modules over such rings. Both algebraic geometry and algebraic number theory build on commutative algebra. Prominent examples of commutative rings include polynomial rings; rings of algebraic int... | Mathematics | Algebra | null |
246018 | https://en.wikipedia.org/wiki/Alluvial%20fan | Alluvial fan | An alluvial fan is an accumulation of sediments that fans outwards from a concentrated source of sediments, such as a narrow canyon emerging from an escarpment. They are characteristic of mountainous terrain in arid to semiarid climates, but are also found in more humid environments subject to intense rainfall and in a... | Physical sciences | Fluvial landforms | null |
246019 | https://en.wikipedia.org/wiki/Elastic-rebound%20theory | Elastic-rebound theory |
In geology, the elastic-rebound theory is an explanation for how energy is released during an earthquake.
As the Earth's crust deforms, the rocks which span the opposing sides of a fault are subjected to shear stress. Slowly they deform, until their internal rigidity is exceeded. Then they separate with a rupture al... | Physical sciences | Seismology | Earth science |
246074 | https://en.wikipedia.org/wiki/Forecasting | Forecasting | Forecasting is the process of making predictions based on past and present data. Later these can be compared with what actually happens. For example, a company might estimate their revenue in the next year, then compare it against the actual results creating a variance actual analysis. Prediction is a similar but more ... | Physical sciences | Science basics | Basics and measurement |
246160 | https://en.wikipedia.org/wiki/Summation | Summation | In mathematics, summation is the addition of a sequence of numbers, called addends or summands; the result is their sum or total. Beside numbers, other types of values can be summed as well: functions, vectors, matrices, polynomials and, in general, elements of any type of mathematical objects on which an operation den... | Mathematics | Sequences and series | null |
246173 | https://en.wikipedia.org/wiki/Phenolphthalein | Phenolphthalein | Phenolphthalein ( ) is a chemical compound with the formula C20H14O4 and is often written as "HIn", "HPh", "phph" or simply "Ph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belo... | Physical sciences | Chemical methods | Chemistry |
246223 | https://en.wikipedia.org/wiki/Component%20%28graph%20theory%29 | Component (graph theory) | In graph theory, a component of an undirected graph is a connected subgraph that is not part of any larger connected subgraph. The components of any graph partition its vertices into disjoint sets, and are the induced subgraphs of those sets. A graph that is itself connected has exactly one component, consisting of the... | Mathematics | Graph theory | null |
246267 | https://en.wikipedia.org/wiki/Magnesium%20sulfate | Magnesium sulfate | Magnesium sulfate or magnesium sulphate is a chemical compound, a salt with the formula , consisting of magnesium cations (20.19% by mass) and sulfate anions . It is a white crystalline solid, soluble in water but not in ethanol.
Magnesium sulfate is usually encountered in the form of a hydrate , for various values o... | Physical sciences | Salts | null |
246275 | https://en.wikipedia.org/wiki/Earwig | Earwig | Earwigs make up the insect order Dermaptera. With about 2,000 species in 12 families, they are one of the smaller insect orders. Earwigs have characteristic cerci, a pair of forceps-like pincers on their abdomen, and membranous wings folded underneath short, rarely used forewings, hence the scientific order name, "ski... | Biology and health sciences | Insects and other hexapods | null |
246333 | https://en.wikipedia.org/wiki/Mayfly | Mayfly | Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the order Ephemeroptera. This order is part of an ancient group of insects termed the ... | Biology and health sciences | Insects: General | Animals |
246449 | https://en.wikipedia.org/wiki/Axiom%20of%20infinity | Axiom of infinity | In axiomatic set theory and the branches of mathematics and philosophy that use it, the axiom of infinity is one of the axioms of Zermelo–Fraenkel set theory. It guarantees the existence of at least one infinite set, namely a set containing the natural numbers. It was first published by Ernst Zermelo as part of his se... | Mathematics | Axiomatic systems | null |
246469 | https://en.wikipedia.org/wiki/Maxwell%20%28unit%29 | Maxwell (unit) | The maxwell (symbol: Mx) is the CGS (centimetre–gram–second) unit of magnetic flux ().
History
The unit name honours James Clerk Maxwell, who presented a unified theory of electromagnetism. The maxwell was recommended as a CGS unit at the International Electrical Congress held in 1900 at Paris. This practical unit wa... | Physical sciences | Magnetic flux | Basics and measurement |
246471 | https://en.wikipedia.org/wiki/Crab-eating%20macaque | Crab-eating macaque | The crab-eating macaque (Macaca fascicularis), also known as the long-tailed macaque or cynomolgus macaque, is a cercopithecine primate native to Southeast Asia. As a synanthropic species, the crab-eating macaque thrives near human settlements and in secondary forest. Crab-eating macaques have developed attributes and ... | Biology and health sciences | Old World monkeys | Animals |
246472 | https://en.wikipedia.org/wiki/Monarch%20butterfly | Monarch butterfly | The monarch butterfly or simply monarch (Danaus plexippus) is a milkweed butterfly (subfamily Danainae) in the family Nymphalidae. Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. It is among the most familiar of North American butterflies and an iconic pollinat... | Biology and health sciences | Lepidoptera | Animals |
246507 | https://en.wikipedia.org/wiki/Silage | Silage | Silage is fodder made from green foliage crops which have been preserved by fermentation to the point of souring. It is fed to cattle, sheep and other ruminants. The fermentation and storage process is called ensilage, ensiling, or silaging. The exact methods vary, depending on available technology, local tradition an... | Technology | Agronomical techniques | null |
10406714 | https://en.wikipedia.org/wiki/Acacia%20penninervis | Acacia penninervis | Acacia penninervis, commonly known as mountain hickory wattle, or blackwood, is a perennial shrub or tree is an Acacia belonging to subgenus Phyllodineae, that is native to eastern Australia.
Description
The shrub or tree typically grows to a height of and has an erect to spreading habit. It has finely or deeply fiss... | Biology and health sciences | Fabales | Plants |
4672524 | https://en.wikipedia.org/wiki/Syngnathiformes | Syngnathiformes | The Syngnathiformes are an order of ray-finned fishes that includes the leafy seadragons, sea moths, trumpetfishes and seahorses, among others.
These fishes have generally elongate, narrow bodies surrounded by a series of bony rings, with small, tubular mouths. The shape of their mouth—at least, in syngnathids—allows... | Biology and health sciences | Acanthomorpha | Animals |
4673783 | https://en.wikipedia.org/wiki/Double%20fisherman%27s%20knot | Double fisherman's knot | The double fisherman's knot or grapevine knot is a bend. This knot and the triple fisherman's knot are the variations used most often in climbing, arboriculture, and search and rescue. The knot is formed by tying a double overhand knot, in its strangle knot form, with each end around the opposite line's standing part.... | Technology | Flexible components | null |
4675301 | https://en.wikipedia.org/wiki/Seymouria | Seymouria | Seymouria is an extinct genus of seymouriamorph from the Early Permian of North America and Europe. Although they were amphibians (in a biological sense), Seymouria were well-adapted to life on land, with many reptilian features—so many, in fact, that Seymouria was first thought to be a primitive reptile. It is primari... | Biology and health sciences | Reptiliomorphs | Animals |
4677186 | https://en.wikipedia.org/wiki/Wien%20approximation | Wien approximation | Wien's approximation (also sometimes called Wien's law or the Wien distribution law) is a law of physics used to describe the spectrum of thermal radiation (frequently called the blackbody function). This law was first derived by Wilhelm Wien in 1896. The equation does accurately describe the short-wavelength (high-f... | Physical sciences | Thermodynamics | Physics |
2525843 | https://en.wikipedia.org/wiki/Cardiac%20cycle | Cardiac cycle | The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole. After em... | Biology and health sciences | Basics | Biology |
2526857 | https://en.wikipedia.org/wiki/Isotopes%20of%20uranium | Isotopes of uranium | Uranium (U) is a naturally occurring radioactive element (radioelement) with no stable isotopes. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity in Earth's crust. The decay product uranium-234 is also found. Other isotopes such as uranium-233 ... | Physical sciences | Actinides | Chemistry |
2527111 | https://en.wikipedia.org/wiki/Isotopes%20of%20oxygen | Isotopes of oxygen | There are three known stable isotopes of oxygen (8O): , , and .
Radioactive isotopes ranging from to have also been characterized, all short-lived. The longest-lived radioisotope is with a half-life of , while the shortest-lived isotope is the unbound with a half-life of , though half-lives have not been measured ... | Physical sciences | Group 16 | Chemistry |
2527114 | https://en.wikipedia.org/wiki/Isotopes%20of%20nitrogen | Isotopes of nitrogen | Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. Thirteen radioisotopes are also known, with atomic masses ranging from 9 to 23, along with three nuclear isomers. All of these radioisotopes are short-li... | Physical sciences | Group 15 | Chemistry |
2527115 | https://en.wikipedia.org/wiki/Isotopes%20of%20carbon | Isotopes of carbon | Carbon (6C) has 14 known isotopes, from to as well as , of which and are stable. The longest-lived radioisotope is , with a half-life of years. This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reaction + → + . The most stable artificial radioisotope... | Physical sciences | Group 14 | Chemistry |
1821971 | https://en.wikipedia.org/wiki/Mid-ocean%20ridge | Mid-ocean ridge | A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of about and rises about above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate boundary. The rate of seafloor spreading determines the morpholog... | Physical sciences | Volcanic landforms | null |
1822282 | https://en.wikipedia.org/wiki/Male | Male | Male (symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the process of fertilisation. A male organism cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually ... | Biology and health sciences | Biological reproduction | null |
1824992 | https://en.wikipedia.org/wiki/Corixidae | Corixidae | Corixidae is a family of aquatic insects in the order Hemiptera. They are found worldwide in virtually any freshwater habitat and a few species live in saline water. There are about 500 known species worldwide, in 55 genera, including the genus Sigara.
Members of the Corixidae are commonly known as lesser water boatme... | Biology and health sciences | Hemiptera (true bugs) | Animals |
1826183 | https://en.wikipedia.org/wiki/False%20gharial | False gharial | The false gharial (Tomistoma schlegelii), also known by the names Malayan gharial, Sunda gharial and tomistoma is a freshwater crocodilian of the family Gavialidae native to Peninsular Malaysia, Borneo, Sumatra and Java. It is listed as Endangered on the IUCN Red List, as the global population is estimated at around 2,... | Biology and health sciences | Crocodilia | Animals |
20646064 | https://en.wikipedia.org/wiki/Quantum | Quantum | In physics, a quantum (: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. Quantum is a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents. The fundamental notion that a property can be "quantized" is referred to as "t... | Physical sciences | Quantum mechanics | Physics |
20646438 | https://en.wikipedia.org/wiki/Real%20number | Real number | In mathematics, a real number is a number that can be used to measure a continuous one-dimensional quantity such as a distance, duration or temperature. Here, continuous means that pairs of values can have arbitrarily small differences. Every real number can be almost uniquely represented by an infinite decimal expansi... | Mathematics | Counting and numbers | null |
20646507 | https://en.wikipedia.org/wiki/Agricultural%20marketing | Agricultural marketing | Agricultural marketing covers the services involved in moving an agricultural product from the farm to the consumer. These services involve the planning, organizing, directing and handling of agricultural produce in such a way as to satisfy farmers, intermediaries and consumers. Numerous interconnected activities are ... | Technology | Agriculture, labor and economy | null |
20646679 | https://en.wikipedia.org/wiki/Lightning%20rod | Lightning rod | A lightning rod or lightning conductor (British English) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it is most likely to strike the rod and be conducted to ground through a wire, rather than passing through the structure, where ... | Technology | Electrical protective devices | null |
20646704 | https://en.wikipedia.org/wiki/Sewage | Sewage | Sewage (or domestic sewage, domestic wastewater, municipal wastewater) is a type of wastewater that is produced by a community of people. It is typically transported through a sewer system. Sewage consists of wastewater discharged from residences and from commercial, institutional and public facilities that exist in th... | Technology | Food, water and health | null |
20646772 | https://en.wikipedia.org/wiki/Vibration | Vibration | Vibration () is a mechanical phenomenon whereby oscillations occur about an equilibrium point. Vibration may be deterministic if the oscillations can be characterised precisely (e.g. the periodic motion of a pendulum), or random if the oscillations can only be analysed statistically (e.g. the movement of a tire on a gr... | Physical sciences | Classical mechanics | Physics |
20646971 | https://en.wikipedia.org/wiki/Waste | Waste | Waste (or wastes) are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention tha... | Technology | Basics_6 | null |
20647050 | https://en.wikipedia.org/wiki/Temperature | Temperature | Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer. It reflects the average kinetic energy of the vibrating and colliding atoms making up a substance.
Thermometers are calibrated in various temperature scales that historical... | Physical sciences | Physics | null |
20647108 | https://en.wikipedia.org/wiki/Red%20fox | Red fox | The red fox (Vulpes vulpes) is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe and Asia, plus parts of North Africa. It is listed as least concern on the IUCN Red List. Its ra... | Biology and health sciences | Canines | Animals |
20647197 | https://en.wikipedia.org/wiki/Modem | Modem | A modulator-demodulator, commonly referred to as a modem, is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by modulating one or more carrier wave signals to encode digital information, while... | Technology | Computer hardware | null |
20647689 | https://en.wikipedia.org/wiki/Irrational%20number | Irrational number | In mathematics, the irrational numbers (in- + rational) are all the real numbers that are not rational numbers. That is, irrational numbers cannot be expressed as the ratio of two integers. When the ratio of lengths of two line segments is an irrational number, the line segments are also described as being incommensura... | Mathematics | Basics | null |
20647810 | https://en.wikipedia.org/wiki/Sunburn | Sunburn | Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness. Other sym... | Biology and health sciences | Types | Health |
20647902 | https://en.wikipedia.org/wiki/Escalator | Escalator | An escalator is a moving staircase which carries people between floors of a building or structure. It consists of a motor-driven chain of individually linked steps on a track which cycle on a pair of tracks which keep the step tread horizontal.
Escalators are often used around the world in places where lifts would be ... | Technology | Architectural elements | null |
20648024 | https://en.wikipedia.org/wiki/Isomer | Isomer | In chemistry, isomers are molecules or polyatomic ions with identical molecular formula – that is, the same number of atoms of each element – but distinct arrangements of atoms in space. Isomerism refers to the existence or possibility of isomers.
Isomers do not necessarily share similar chemical or physical properti... | Physical sciences | Substance | Chemistry |
20648143 | https://en.wikipedia.org/wiki/Cestoda | Cestoda | Cestoda is a class of parasitic worms in the flatworm phylum (Platyhelminthes). Most of the species—and the best-known—are those in the subclass Eucestoda; they are ribbon-like worms as adults, commonly known as tapeworms. Their bodies consist of many similar units known as proglottids—essentially packages of eggs whic... | Biology and health sciences | Platyzoa | null |
3472480 | https://en.wikipedia.org/wiki/Carex | Carex | Carex is a vast genus of over 2,000 species of grass-like plants in the family Cyperaceae, commonly known as sedges (or seg, in older books). Other members of the family Cyperaceae are also called sedges, however those of genus Carex may be called true sedges, and it is the most species-rich genus in the family. The st... | Biology and health sciences | Poales | Plants |
19461794 | https://en.wikipedia.org/wiki/Porosity | Porosity | Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the... | Physical sciences | Petrology | Earth science |
19463014 | https://en.wikipedia.org/wiki/Atomic%20emission%20spectroscopy | Atomic emission spectroscopy | Atomic emission spectroscopy (AES) is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular wavelength to determine the quantity of an element in a sample. The wavelength of the atomic spectral line in the emission spectrum gives the identity of the e... | Physical sciences | Spectroscopy | Chemistry |
19467352 | https://en.wikipedia.org/wiki/Richter%20scale | Richter scale | The Richter scale (), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude sca... | Physical sciences | Seismology | Earth science |
19468046 | https://en.wikipedia.org/wiki/Autoimmune%20disease | Autoimmune disease | An autoimmune disease is a condition that results from an anomalous response of the adaptive immune system, wherein it mistakenly targets and attacks healthy, functioning parts of the body as if they were foreign organisms. It is estimated that there are more than 80 recognized autoimmune diseases, with recent scientif... | Biology and health sciences | Non-infectious disease | null |
19468696 | https://en.wikipedia.org/wiki/Fundamental%20theorem%20of%20calculus | Fundamental theorem of calculus | The fundamental theorem of calculus is a theorem that links the concept of differentiating a function (calculating its slopes, or rate of change at each point in time) with the concept of integrating a function (calculating the area under its graph, or the cumulative effect of small contributions). Roughly speaking, th... | Mathematics | Calculus and analysis | null |
1215420 | https://en.wikipedia.org/wiki/Trajan%27s%20Bridge | Trajan's Bridge | Trajan's Bridge (; ), also called Bridge of Apollodorus over the Danube, was a Roman segmental arch bridge, the first bridge to be built over the lower Danube and considered one of the greatest achievements in Roman architecture. Though it was only functional for 165 years, it is often considered to have been the longe... | Technology | Bridges | null |
1216060 | https://en.wikipedia.org/wiki/Nitride | Nitride | In chemistry, a nitride is a chemical compound of nitrogen. Nitrides can be inorganic or organic, ionic or covalent. The nitride anion, N3- ion, is very elusive but compounds of nitride are numerous, although rarely naturally occurring. Some nitrides have a found applications, such as wear-resistant coatings (e.g., tit... | Physical sciences | Nitride salts | Chemistry |
1216077 | https://en.wikipedia.org/wiki/Electrophilic%20addition | Electrophilic addition | In organic chemistry, an electrophilic addition (AE) reaction is an addition reaction where a chemical compound containing a double or triple bond has a π bond broken, with the formation of two new σ bonds.
The driving force for this reaction is the formation of an electrophile X+ that forms a covalent bond with an el... | Physical sciences | Organic reactions | Chemistry |
1218564 | https://en.wikipedia.org/wiki/Paratransit | Paratransit | Paratransit (the term used in North America) or intermediate public transport (also known by other names such as community transport (UK)), is a type of transportation service that supplements fixed-route mass transit by providing individualized rides without fixed routes or timetables. Paratransit services may vary co... | Technology | Specific-purpose transportation | null |
1218763 | https://en.wikipedia.org/wiki/Sivapithecus | Sivapithecus | Sivapithecus () (syn: Ramapithecus) is a genus of extinct apes. Fossil remains of animals now assigned to this genus, dated from 12.2 million years old in the Miocene, have been found since the 19th century in the Sivalik Hills of the Indian subcontinent as well as in Kutch. Any one of the species in this genus may ha... | Biology and health sciences | Apes | Animals |
8073009 | https://en.wikipedia.org/wiki/Tonsil | Tonsil | The tonsils are a set of lymphoid organs facing into the aerodigestive tract, which is known as Waldeyer's tonsillar ring and consists of the adenoid tonsil (or pharyngeal tonsil), two tubal tonsils, two palatine tonsils, and the lingual tonsils. These organs play an important role in the immune system.
When used unqu... | Biology and health sciences | Human anatomy | Health |
20653168 | https://en.wikipedia.org/wiki/Earth%20science | Earth science | Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere, hydrosphere/cryosphere, atmosphere, and geosphere (or lit... | Physical sciences | Earth science | null |
20656228 | https://en.wikipedia.org/wiki/Maize | Maize | Maize (Zea mays), also known as corn in North American English, is a tall stout grass that produces cereal grain. It was domesticated by indigenous peoples in southern Mexico about 9,000 years ago from wild teosinte. Native Americans planted it alongside beans and squashes in the Three Sisters polyculture. The leafy s... | Biology and health sciences | Food and drink | null |
20657585 | https://en.wikipedia.org/wiki/Scenic%20route | Scenic route | A scenic route, tourist road, tourist route, tourist drive, holiday route, theme route, or scenic byway is a specially designated road or waterway that travels through an area of natural or cultural beauty. It often passes by scenic viewpoints. The designation is usually determined by a governmental body, such as a Dep... | Technology | Road infrastructure | null |
15537745 | https://en.wikipedia.org/wiki/Frequentist%20inference | Frequentist inference | Frequentist inference is a type of statistical inference based in frequentist probability, which treats “probability” in equivalent terms to “frequency” and draws conclusions from sample-data by means of emphasizing the frequency or proportion of findings in the data. Frequentist inference underlies frequentist statist... | Mathematics | Statistics | null |
15548640 | https://en.wikipedia.org/wiki/Adrenaline | Adrenaline | Adrenaline, also known as epinephrine, is a hormone and medication which is involved in regulating visceral functions (e.g., respiration). It appears as a white microcrystalline granule. Adrenaline is normally produced by the adrenal glands and by a small number of neurons in the medulla oblongata. It plays an essentia... | Biology and health sciences | Biochemistry and molecular biology | null |
18455584 | https://en.wikipedia.org/wiki/Thyroid%20hormones | Thyroid hormones | Thyroid hormones are two hormones produced and released by the thyroid gland, triiodothyronine (T3) and thyroxine (T4). They are tyrosine-based hormones that are primarily responsible for regulation of metabolism. T3 and T4 are partially composed of iodine, derived from food. A deficiency of iodine leads to decreased p... | Biology and health sciences | Animal hormones | Biology |
18457137 | https://en.wikipedia.org/wiki/Personal%20computer | Personal computer | A personal computer, often referred to as a PC or simply computer, is a computer designed for individual use. It is typically used for tasks such as word processing, internet browsing, email, multimedia playback, and gaming. Personal computers are intended to be operated directly by an end user, rather than by a comput... | Technology | Computer hardware | null |
18457910 | https://en.wikipedia.org/wiki/Mollusc%20shell | Mollusc shell | The mollusc (or mollusk) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes. Not all shelled molluscs live in the sea; many live on the land and in freshwater.
The an... | Biology and health sciences | Skeletal system | Biology |
4679310 | https://en.wikipedia.org/wiki/Crowned%20pigeon | Crowned pigeon | The crowned pigeons (Goura) are a genus of birds in the family Columbidae. It contains four large species of pigeon that are endemic to the island of New Guinea and a few surrounding islands. The species are extremely similar to each other in appearance, and occupy different regions of New Guinea. The genus was introdu... | Biology and health sciences | Columbimorphae | Animals |
449669 | https://en.wikipedia.org/wiki/Silver%20iodide | Silver iodide | Silver iodide is an inorganic compound with the formula AgI. The compound is a bright yellow solid, but samples almost always contain impurities of metallic silver that give a grey colouration. The silver contamination arises because some samples of AgI can be highly photosensitive. This property is exploited in sil... | Physical sciences | Halide salts | Chemistry |
449738 | https://en.wikipedia.org/wiki/Fixed%20point%20%28mathematics%29 | Fixed point (mathematics) | In mathematics, a fixed point (sometimes shortened to fixpoint), also known as an invariant point, is a value that does not change under a given transformation. Specifically, for functions, a fixed point is an element that is mapped to itself by the function. Any set of fixed points of a transformation is also an invar... | Mathematics | Functions: General | null |
449744 | https://en.wikipedia.org/wiki/Storm%20surge | Storm surge | A storm surge, storm flood, tidal surge, or storm tide is a coastal flood or tsunami-like phenomenon of rising water commonly associated with low-pressure weather systems, such as cyclones. It is measured as the rise in water level above the normal tidal level, and does not include waves.
The main meteorological facto... | Physical sciences | Storms | Earth science |
449843 | https://en.wikipedia.org/wiki/Hypericum | Hypericum | Hypericum is a genus of flowering plants in the family Hypericaceae (formerly considered a subfamily of Clusiaceae). The genus has a nearly worldwide distribution, missing only from tropical lowlands, deserts and polar regions. Many Hypericum species are regarded as invasive species and noxious weeds. All members of... | Biology and health sciences | Malpighiales | null |
449934 | https://en.wikipedia.org/wiki/Dairy%20farming | Dairy farming | Dairy farming is a class of agriculture for the long-term production of milk, which is processed (either on the farm or at a dairy plant, either of which may be called a dairy) for the eventual sale of a dairy product. Dairy farming has a history that goes back to the early Neolithic era, around the seventh millennium ... | Technology | Agriculture_2 | null |
450023 | https://en.wikipedia.org/wiki/Ginseng | Ginseng | Ginseng () is the root of plants in the genus Panax, such as Korean ginseng (P. ginseng), South China ginseng (P. notoginseng), and American ginseng (P. quinquefolius), characterized by the presence of ginsenosides and gintonin. Ginseng is common in the cuisines and medicines of China and Korea.
Ginseng has been used ... | Biology and health sciences | Apiales | null |
450175 | https://en.wikipedia.org/wiki/Zoraptera | Zoraptera | The insect order Zoraptera, commonly known as angel insects, contains small and soft bodied insects with two forms: winged with wings sheddable as in termites, dark and with eyes (compound) and ocelli (simple); or wingless, pale and without eyes or ocelli. They have a characteristic nine-segmented beaded (moniliform) a... | Biology and health sciences | Insects: General | Animals |
450257 | https://en.wikipedia.org/wiki/Urban%20agriculture | Urban agriculture | Urban agriculture refers to various practices of cultivating, processing, and distributing food in urban areas. The term also applies to the area activities of animal husbandry, aquaculture, beekeeping, and horticulture in an urban context. Urban agriculture is distinguished from peri-urban agriculture, which takes pla... | Technology | Agriculture_2 | null |
450636 | https://en.wikipedia.org/wiki/Quartzite | Quartzite | Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pin... | Physical sciences | Metamorphic rocks | Earth science |
450703 | https://en.wikipedia.org/wiki/Display%20device | Display device | A display device is an output device for presentation of information in visual or tactile form (the latter used for example in tactile electronic displays for blind people). When the input information that is supplied has an electrical signal the display is called an electronic display.
Common applications for electro... | Technology | Media and communication: Basics | null |
450749 | https://en.wikipedia.org/wiki/Sea%20breeze | Sea breeze | A sea breeze or onshore breeze is any wind that blows from a large body of water toward or onto a landmass. By contrast, a land breeze or offshore breeze is any wind that blows from a landmass toward or onto a large body of water. Sea breezes and land breezes are both important factors in coastal regions' prevailing wi... | Physical sciences | Winds | Earth science |
451321 | https://en.wikipedia.org/wiki/Rhode%20Island%20Red | Rhode Island Red | The Rhode Island Red is an American breed of domestic chicken. It is the state bird of Rhode Island. It was developed there and in Massachusetts in the late nineteenth century, by cross-breeding birds of Oriental origin such as the Malay with brown Leghorn birds from Italy. It was a dual-purpose breed, raised both for ... | Biology and health sciences | Chickens | Animals |
451687 | https://en.wikipedia.org/wiki/Ski%20lift | Ski lift | A ski lift is a mechanism for transporting skiers up a hill. Ski lifts are typically a paid service at ski resorts. The first ski lift was built in 1908 by German Robert Winterhalder in Schollach/Eisenbach, Hochschwarzwald.
Types
Aerial lifts transport skiers while suspended off the ground. Aerial lifts are often b... | Technology | Rail and cable transport | null |
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