A9R18EC.tmp 2 - 2. The Earth 1. Cloud of gas and dust 2....

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Prof. M. Fall - University of Ottawa 2 2.1 The Earth: origin and history 2.2 Earth Structure and dynamic 2.3 The Earth’s crust: its main components Plan 2. The Earth 2.1 The Earth: origin and history (1) 2. The Earth Origin of the Universe b is still a myster b Several theories exist b Age of the Universe- about 12 billions years b The solar system : about 4.6 billions years Four main steps can be identified (see next slide) The solar system Source E. Tric 2.1 The Earth: origin and history (2)
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Unformatted text preview: 2. The Earth 1. Cloud of gas and dust 2. Sun and flat disk of debris 3. Creation of planets 4. Solar wind blows up debris Source: J.-P. Bardet 2.1 The Earth: origin and history (3) 2. The Earth Source: Bhawan Singh Singh 2.1 The Earth: origin and history (4) Origin of the Solar System & Earth Origin of the Solar System & Earth Source: Google La Terre The Earth Venus Mars Jupiter Pluton Uranus Photos of some planets of our solar system 2.1 The Earth: origin and history (5)...
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