Plural Nouns

Yes, bacteria is the plural form and bacterium is the singular form.

The plural of "nergro" is "negros."

Neatness is a mass noun, it has no plural form.

The plural form of "photosynthesis" is "photosyntheses."

The plural form of the noun 'department' is departments.

The word "genes" applied to biological DNA, is plural. (adjectives use the singlular, e.g. "gene therapy") "Blue jeans" (pants) is a "paired plural" noun such as "pliers" or "scissors", with almost no use of the singular. "Jean material" is probably the exception. The term "blue jeans" for denim pants originated in the "Gold Rush" period of 1850-55.

There is no plural, it is as it is. Its the same thing with sheep. You cannot say look at all the sheeps.

The average salary of an entomologist is anywhere from $50,000 and up. Also, entomologists usually work 40 hours a week. Like any other profession, the more experience you have, the higher your income will be.

The temperature at the equator can vary depending on the time of year and specific location, but it generally ranges from 25 to 35 degrees Celsius (77 to 95 degrees Fahrenheit). The equatorial region typically experiences warm temperatures year-round due to its proximity to the sun.

The Biosphere is being disturbed by human activities such as deforestation, pollution, overfishing, and climate change. These activities are leading to loss of biodiversity, habitat destruction, and disruption of ecosystems, impacting the balance and functioning of the Biosphere.

A gully is a narrow and deep channel caused by erosion, often formed by running water or rainfall. It can occur in natural landscapes or as a result of human activity that disrupts the natural flow of water. Gullies can have significant impacts on the landscape and ecosystem.

This is a low lying place where late and early frosts are more likely than in the surrounding areas. A frost pocket is sometimes sparse in vegetation, especially in those species that can be damaged by late frosts in spring or early frosts in autumn.

The singular form is phenomenon.

Frost is a coating or layer of ice that forms on surfaces due to the freezing of water vapor in the air when temperatures drop below freezing. It often appears as delicate, feathery patterns on objects like grass, leaves, or car windows.

There are two theories: biological origin (currently the dominant theory) and non-biological (not widely accepted in the scientific community, but with some good points to it). From Wikipedia ( http://en.wikipedia.org/wiki/Petroleum#F... ):

Biogenic theory

Most geologists view crude oil, like coal and natural gas, as the product of compression and heating of ancient organic materials over geological time. According to this theory, oil is formed from the preserved remains of prehistoric zooplankton and algae which have been settled to the sea bottom in large quantities under anoxic conditions. (Terrestrial plants tend to form coal, and very few dinosaurs have been converted into oil.) Over geological time this organic matter, mixed with mud, is buried under heavy layers of sediment. The resulting high levels of heat and pressure cause the remains to metamorphose, first into a waxy material known as kerogen which is found in various oil shales around the world, and then with more heat into liquid and gaseous hydrocarbons in a process known as catagenesis. Because most hydrocarbons are lighter than rock or water, these sometimes migrate upward through adjacent rock layers until they become trapped beneath impermeable rocks, within porous rocks called reservoirs. Concentration of hydrocarbons in a trap forms an oil field, from which the liquid can be extracted by drilling and pumping.

Geologists often refer to an "oil window" which is the temperature range that oil forms in-below the minimum temperature oil remains trapped in the form of kerogen, and above the maximum temperature the oil is converted to natural gas through the process of thermal cracking. Though this happens at different depths in different locations around the world, a 'typical' depth for the oil window might be 4-6 km. Note that even if oil is formed at extreme depths, it may be trapped at much shallower depths, even if it is not formed there. (In the case of the Athabasca Oil Sands, it is found right at the surface.) Three conditions must be present for oil reservoirs to form: first, a source rock rich in organic material buried deep enough for subterranean heat to cook it into oil; second, a porous and permeable reservoir rock for it to accumulate in; and last a cap rock (seal) that prevents it from escaping to the surface.

If an oil well were to run dry and be capped, it would be back to original supply rates eventually. There is considerable question about how long this would take. Some formations appear to have a regeneration time of decades. Majority opinion is that oil is being formed at less than 1% of the current consumption rate.

The vast majority of oil that has been produced by the earth has long ago escaped to the surface and been biodegraded by oil-eating bacteria. What oil companies are looking for is the small fraction that has been trapped by this rare combination of circumstances. Oil sands are reservoirs of partially biodegraded oil still in the process of escaping, but contain so much migrating oil that, although most of it has escaped, vast amounts are still present - more than can be found in conventional oil reservoirs. On the other hand, oil shales are source rocks that have never been buried deep enough to convert their trapped kerogen into oil.

The reactions that produce oil and natural gas are often modeled as first order breakdown reactions, where kerogen is broken down to oil and natural gas by a set of parallel reactions, and oil eventually breaks down to natural gas by another set of reactions. The first set was originally patented in 1694 under British Crown Patent No. 330 covering "a way to extract and make great quantityes of pitch, tarr, and oyle out of a sort of stone." The latter set is regularly used in petrochemical plants and oil refineries.

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Abiogenic theory

Main article: Abiogenic petroleum origin

The idea of abiogenic petroleum origin was championed in the Western world by astronomer Thomas Gold based on thoughts from Russia, mainly on studies of Nikolai Kudryavtsev. The idea proposes that large amounts of carbon exist naturally in the planet, some in the form of hydrocarbons. Hydrocarbons are less dense than aqueous pore fluids, and migrate upward through deep fracture networks. Thermophilic, rock-dwelling microbial life-forms are in part responsible for the biomarkers found in petroleum.

However, this theory is very much a minority opinion, especially amongst western geologists. It often pops up when scientists are not able to explain apparent oil inflows into certain oil reservoirs. However, most of these "abiotic" fields are explained as being the result of geologic quirks. No western oil companies are currently known to explore for oil based on this theory.

Amphibolite typically has a medium to coarse-grained texture with a foliated structure. It consists mainly of amphibole minerals such as hornblende, which gives it a dark color and a shiny appearance.

Strong tidal forces push salinity upriver beneath the outflowing river water. The turbulence caused by this tidal forcing results in resuspension of sediment and other particulate material present on the river bed. Concurrently, dissolved material in the river water flocculates when it comes into contact with the salt wedge pushing its way upriver. The combination of these two processes results in elevated levels of suspended particulate material: the estuarine turbidity maximum (ETM). Within the region of the ETM, material in the water column, and on the bed of the estuary, is trapped, resuspended and advected. ETMs vary in strength and distance they move with the tides depending on the strength of the tide and the flow of the river. Hope this helps!

equillibrium in earths crust such that the force tending to elevate land masses balance the forces tending to depress land masses equillibrium in earths crust such that the force tending to elevate land masses balance the forces tending to depress land masses

The plural form of the noun nuisance is nuisances.

The plural of necessity is necessities.

the singular term is TRIVIUM. Trivia is already in plural form

Salt is considered a mass noun, which means it is generally used in the singular form. However, it can also be used in the plural form when referring to different types or varieties of salt.

The plural form is... 'officers in charge'.