East Coast Swing (ECS) is a form of social partner dance. It belongs to the group of swing dances. It is danced under fast swing music, including: big band, rock and roll, rockabilly, and boogie-woogie.
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas.
In the Arrhenius model of reaction rates, activation energy is the minimum amount of energy that must be available to reactants for a chemical reaction to occur. The activation energy (Ea) of a reaction is measured in kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). Activation energy can be thought of as the magnitude of the potential barrier (sometimes called the energy barrier) separating minima of the potential energy surface pertaining to the initial and final thermodynamic state. For a chemical reaction to proceed at a reasonable rate, the temperature of the system should be high enough such that there exists an appreciable number of molecules with translational energy equal to or greater than the activation energy. The term "activation energy" was introduced in 1889 by the Swedish scientist Svante Arrhenius.
Dance moves or dance steps are usually isolated, defined, and organized so that beginning dancers can learn and use them independently of each other. However, more complex movements are influenced by musicality and lyrical relevance to express emotions or refer to a message. Dance moves tend to emphasize the concepts of lead and follow and connection.
Glaciology is the scientific study of glaciers, or, more generally, ice and natural phenomena that involve ice.
In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical reaction occurs.
A cirque is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie and cwm. A cirque may also be a similarly shaped landform arising from fluvial erosion.
The cha-cha-cha, is a dance of Cuban origin. It is danced to the music of the same name introduced by the Cuban composer and violinist Enrique Jorrin in the early 1950s. This rhythm was developed from the danzón-mambo. The name of the dance is an onomatopoeia derived from the shuffling sound of the dancers' feet when they dance two consecutive quick steps that characterize the dance.
Glacial landforms are landforms created by the action of glaciers. Most of today's glacial landforms were created by the movement of large ice sheets during the Quaternary glaciations. Some areas, like Fennoscandia and the southern Andes, have extensive occurrences of glacial landforms; other areas, such as the Sahara, display rare and very old fossil glacial landforms.
A bergschrund is a crevasse that forms where moving glacier ice separates from the stagnant ice or firn above. It is often a serious obstacle for mountaineers, who sometimes abbreviate "bergschrund" to "schrund". Bergschrunds extend to the bedrock and can have a depth of well over 100 metres (330 ft).
The Highland Fling is a solo Highland dance that gained popularity in the early 19th century. The word 'Fling' means literally a movement in dancing. In John Jamieson's 1808 Etymological Dictionary of the Scottish Language, the Highland Fling was defined as 'one species of movement' in dancing, not as one particular movement. There is some speculation that the first solo Highland Fling dances simply showed off steps that individual dancers preferred in the Strathspey Reel, a social dance.
The Cirque de Gavarnie is a cirque in the central Pyrenees, in Southwestern France, close to the border of Spain. It is within the commune of Gavarnie, the department of Hautes-Pyrénées, and the Pyrénées National Park. Major features of the cirque are La Brèche de Roland and the Gavarnie Falls. It was described by Victor Hugo as "the Colosseum of nature" due to its enormous size and horseshoe shape resembling an ancient amphitheatre. The cirque was inscribed on the UNESCO World Heritage List in 1997 as part of the Pyrénées – Mont Perdu World Heritage Site.
A stepped gable, crow-stepped gable, or corbie step is a stairstep type of design at the top of the triangular gable-end of a building. The top of the parapet wall projects above the roofline and the top of the brick or stone wall is stacked in a step pattern above the roof as a decoration and as a convenient way to finish the brick courses. A stepped parapet may appear on building facades with or without gable ends, and even upon a false front.
The Algerian Scale is a scale frequently used in Algerian, Berber, and North African music. The frequent use of 1.5 steps in the scale contributes to a sound commonly associated with Moorish music.
The Bucks Lake Wilderness is a 23,958-acre (97.0 km2) wilderness area located in the Plumas National Forest section of the Sierra Nevada, in northeastern California, United States.
The Rock of Guatapé is a landmark inselberg in Colombia. It is located in the town and municipality of Guatapé, Antioquia. It is also known as The Stone of El Peñol, or simply La Piedra or El Peñol, as the town of El Peñol, which borders Guatapé, has also historically claimed the rock as their own and thus has led to different names for the site.
A randkluft or rimaye is the headwall gap between a glacier or snowfield and the adjacent rock face at the back of the cirque or, more loosely, between the rock face and the side of the glacier.
Netball is a ball sport for two teams of seven players; its rules are published in print and online by the International Netball Federation. Games are played on a rectangular court divided into thirds, with a raised goal at each short end. The objective of the game is for teams to score goals, by passing a ball and shooting it into the opposite team's goal ring. Players are assigned "positions" that define their role within the team and restrict their movement on court.
A valley step is a prominent change in the longitudinal slope of a valley, mainly in trough valleys formed by glaciers.
The head of the valley or, less commonly, the valley head, refers to the uppermost part of a valley.
