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56 Topic Pages Found in Science and starting with the letter O
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Open Oak

any tree or shrub of the genus Quercus of the family Fagaceae ( beech family). This complex genus includes as many as 600, found chiefly in north

Open Oases

The term "oasis" is often taken in its metaphorical and very broad sense: a spot of life within an inhospitable environment. In that way, it has

Open Oats

cereal plants of the genus Avena of the family Gramineae ( grass family). Most species are annuals of moist temperate regions. The early history of

Open observatory

scientific facility especially equipped to detect and record naturally occurring scientific phenomena. Although geological and meteorological

Open Obsessive-compulsive disorder
Obsessive-compulsive disorder

Obsessions and the compulsive behaviors often associated with them are symptoms of an obsessive-compulsive disorder (OCD). Like many other mental

Open Obsidian

Obsidian is the best known glassy rock. It is a volcanic glass and is supposedly named after Obsidian, a Roman said to have brought the first

Open Ocean

interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major

Open Oceanography

Study of the oceans. Its subdivisions deal with each ocean's extent and depth, the water's evolution and composition, its physics and chemistry, the

Open Ocean wave power
Ocean wave power

Power obtained by harnessing the energy of water waves. Various schemes have been advanced since 1973 when oil prices rose dramatically and an energy

Open Ocean waves
Ocean waves

Wind-generated ocean waves are generally the most significant physical force involved in the erosion of coasts and experienced by wave-swept plants