Earth is mostly iron, oxygen and silicon The remaining 30% is the solid ground, rising above sea level. 70% of our planet is covered with oceans. When astronauts first went into the space, they looked back at the Earth with human eyes for the first time, and called our home the Blue Planet. 70% of the Earth’s surface is covered in water The average density of the Earth is approximately 5.52 grams per cubic centimetre.Įarth distance from the Sun and orbital eccentricity This varies according to the part of the planet for example, the metallic core is denser than the crust. The Earth is the densest planet in the Solar System.Although only Mercury, Venus, Mars, Jupiter and Saturn were named during ancient times, because they were visible to the naked eye, the Roman method of naming planets was retained after the discovery of Uranus and Neptune. The other seven planets in our solar system are all named after Roman gods or goddesses. Earth is the only planet not named after a god. In real terms, however, it is only the fifth largest natural satellite. There is only one natural satellite of the planet Earth.Īs a percentage of the size of the body it orbits, the Moon is the largest satellite of any planet in our solar system.This field protects the Earth from the effects of solar wind. This phenomenon is caused by the nickel-iron core of the planet, coupled with its rapid rotation. Eventually, the view that the Sun was at the centre of the universe was postulated by Copernicus, though this is also not the case. The Earth was once believed to be the centre of the universe.ĭue to the apparent movements of the Sun and planets in relation to their viewpoint, ancient scientists insisted that the Earth remained static, whilst other celestial bodies travelled in circular orbits around it.This has the effect of lengthening our days, but it happens so slowly that it could be as much as 140 million years before the length of a day will have increased to 25 hours. This deceleration is happening almost imperceptibly, at approximately 17 milliseconds per hundred years, although the rate at which it occurs is not perfectly uniform. The Earth’s rotation is gradually slowing.The present study helps to create an overview of the multiple viewpoints by specifying the conceptual space of information seeking phenomena. Conclusions: Information seeking is a multifaceted phenomenon, the research of which has led to conceptual multiplicity. The core activity of passive monitoring is the recognition of potentially relevant sources, while the mode of incidental acquisition of information is based on passive reception of information in certain events or situations. The mode of browsing and scanning is based on the selection and sampling of information sources. Results: The main activities constituting active seeking and searching are the identification, selection, location and accessing of information. The study draws on the conceptual analysis of fifty-two key articles or books characterizing the constituents of the above modes. The model was slightly elaborated, resulting in the identification of four main modes of information seeking: (i) active seeking and searching, (ii) browsing and scanning, (iii) passive monitoring, and (iv) incidental acquisition of information. Method: The study builds on Bates' integrated model of information seeking and searching, originally presented in 2002. Introduction: The article contributes to conceptual studies of information behaviour research by examining the conceptualisations of information seeking and related terms such as information search and browsing.
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