Pencils create marks by physical abrasion, leaving behind a trail of solid core material that adheres to a sheet of paper or other surface. They are distinct from pens, which instead disperse a trail of liquid or gel ink that stains the light colour of the paper.Most pencil cores are made of graphite mixed with a clay binder which leaves grey or black marks that can be easily erased. Graphite pencils are used for both writing and drawing and result in durable markings: though writing is easily removable with an eraser, it is otherwise resistant to moisture, most chemicals, ultraviolet radiation, and natural aging. Other types of pencil core are less widely used, such as charcoal pencils, which are mainly used by artists for drawing and sketching. Coloured pencils are sometimes used by teachers or editors to correct submitted texts, but are typically regarded as art supplies, especially those with waxy core binders that tend to smear on paper instead of erasing. Grease pencils have a softer, crayon-like waxy core that can leave marks on smooth surfaces such as glass or porcelain.

An electric guitar is a fretted string instrument that uses a pickup to convert the vibration of its strings—which are typically made of steel, and which occurs when a guitarist strums, plucks or fingerpicks the strings—into electrical signals. The vibrations of the strings are sensed by a pickup, of which the most common type is the magnetic pickup, which uses the principle of direct electromagnetic induction. The signal generated by an electric guitar is too weak to drive a loudspeaker, so it is plugged into a guitar amplifier before being sent to a loudspeaker, which makes a sound loud enough to hear. The output of an electric guitar is an electric signal, and the signal can easily be altered by electronic circuits to add "color" to the sound or change the sound. Often the signal is modified using effects such as reverb and distortion and "overdrive", with the latter being a key element of the sound of the electric guitar as it is used in blues and rock music.

Today, the term lantern is used to describe many types of portable lighting, but lanterns originated as a protective enclosure for a light source - usually a candle - to make it easier to carry and hang up, and more practicle outdoors or in drafty interiors such as passages and staircases where unguarded candles were more likely to blown out by gusts of air - not just from wind but even opening a door.Lanterns were usually made from a metal frame, commonly with a hook or hoop of metal on top. Though some lanterns had up to eight sides, five or six was not uncommon but four was the standard, these would be made of some translucent material, now usually glass or plastic but formerly thin sheets of animal horn or tinplate punched with holes or, more ornately, in decorative patterns; though some antique lanterns have only a metal grid, clearly indicating their function was that outlined below.

Drawing is a form of visual art in which a person uses various drawing instruments to mark paper or another two-dimensional medium. Instruments include graphite pencils, pen and ink, inked brushes, wax color pencils, crayons, charcoal, chalk, pastels, various kinds of erasers, markers, styluses, various metals  and electronic drawing.

A candle is an ignitable wick embedded in wax or another flammable solid substance such as tallow that provides light, and in some cases, a fragrance. It can also be used to provide heat, or used as a method of keeping time.A candle manufacturer is traditionally known as a chandler.Various devices have been invented to hold candles, from simple tabletop candle holders to elaborate chandeliers.For a candle to burn, a heat source (commonly a naked flame) is used to light the candle's wick, which melts and vaporizes a small amount of fuel (the wax). Once vaporized, the fuel combines with oxygen in the atmosphere to ignite and form a constant flame. This flame provides sufficient heat to keep the candle burning via a self-sustaining chain of events: the heat of the flame melts the top of the mass of solid fuel; the liquefied fuel then moves upward through the wick via capillary action; the liquefied fuel finally vaporizes to burn within the candle's flame.

A nightlight is a small light fixture, often electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as in an emergency. Small long-burning candles serving a similar function are referred to as tealights.

A fish is any member of a group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups.

The Spanish Wikipedia (Spanish: Wikipedia en español) is a Spanish-language edition of Wikipedia, a free, online encyclopedia. It has 1,306,643 articles. Started in May 2001, it reached 100,000 articles on March 8, 2006 and 1,000,000 articles on May 16, 2013. It is the 9th-largest Wikipedia as measured by the number of articles and has the 4th-largest number of edits.