How the earth formed
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Astronomers think that the Earth probably formed at the same time as all the other rocky materials in our solar system, including the oldest meteorites. The oldest meterorites ever found on earth contain nearly equal amounts of both uranium-238 and lead-206. Based on Figure 8.16, what is Earth…
[DOCX File]The Formation of Earth
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Earth formed about 4.6 billion years ago. That's 4,600,000,000! If you divided 4.6 billion by 100, then each yard equals 46,000,000 years, and each ten yard section equals 460,000,000 years. Making a Time Line Draw a model of a football field. Starting at the left (4.6 billion years ago) and "moving forward in time," label the 10-yard lines in ...
[DOC File]Geologic Time Activity - Cloverleaf Local
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formed by natural processes. inorganic solids. elements or compounds with a chemical composition unique to that mineral. crystal structures; that is the atoms in minerals are arranged in a pattern that is repeated over and over again. Minerals are formed out of molten earth material or magma, or when water containing dissolved ions evaporates,
[DOC File]Loudoun County Public Schools / Overview
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The Earth formed approximately 4.6 billion year ago as a molten ball of rock. There was almost no atmosphere. As the Earth cooled a solid crust formed. There was a high level of volcanic activity. Volcanoes gave out mostly carbon dioxide (CO 2), steam (H 2 O), and small amounts of ammonia (NH 3) and methane (CH 4). There was little or no oxygen in the Earth’s early atmosphere.
In Depth | Earth – NASA Solar System Exploration
Earth formed at least 4.53 billion years ago. Gravity pulled material from a nebula of rock, gas, and dust into a spinning disk. The sun formed in the center, and the disk then coalesced into the planets. Young Earth contained seas of magma and had regular asteroid impacts.
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