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The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth
Educational videos Free ? 60secondcap Academic Earth: Multidisciplinary Lectures from universities Free ? Academic Earth: Coursera: Multidisciplinary Educational courses with lectures, quizzes and exams provided by universities for free. Certificates are provided by the respective university on successful completion of a course. Free ? Coursera
This questioning represented a turning point in the study of the Earth. It was now possible to study the history of the Earth from a scientific perspective without religious preconceptions. With the application of scientific methods to the investigation of the Earth's history, the study of geology could become a distinct field of science.
How the Earth Was Made is a documentary television series produced by Pioneer Productions for the History Channel.It began as a two-hour special exploring the geological history of Earth, airing on December 16, 2007.
1. "Down to Earth" – Beginning by comparing surface conditions on the planets Venus and Mars with the living landscapes of the Earth to highlight how unique the Earth is, the episode describes the goal of the study of geology and introduces major topics the series addresses, including the Earth's heat engines, plate tectonics, volcanism, earthquakes and seismology, erosion, and natural ...
Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System. Initially, Earth was molten due to extreme volcanism and frequent collisions with other bodies.
The first use of a name has precedence over all others, as does the first name applied to a particular formation. [6] As with other stratigraphic units, the formal designation of a formation includes a stratotype which is usually a type section. A type section is ideally a good exposure of the formation that shows its entire thickness.
Earth Learning Idea (ELI) provides free Earth-related teaching ideas, designed to be practical science and geography resources for secondary and primary teachers and teacher-trainers and trainees across the world. It is run on a voluntary basis by three teachers from the Earth Science Education Unit (ESEU).