How earth was formed
[DOC File]Earth’s History Regents Questions
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4. Scientists have inferred that Earth’s original atmosphere was formed by the (1) outgassing from Earth’s interior (2) erosion of Earth’s surface (3) decay of microorganisms in Earth’s oceans (4) radioactive decay of elements in Earth’s core. 5.
[DOC File]Name:_______________
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Scientists believe that when the earth was first formed, its crust was made of metamorphic rock. _____2. When magma cools slowly, the minerals within it form large crystals. _____3. When different minerals in one rock have formed bands or layers, the rock is called clastic.
[DOC File]Unit 4 Chapter 5 How Earth’s Rocks were Formed
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Unit 3 Chapter 5 How Earth’s Rocks were Formed. HOMEWORK: HW 1 Topic Questions: PG. 68, 74, 79. HW 2 Review, Interpret & Apply, Crit. Thinking pg 82-83. Unit 1 Igneous Rocks. Topic 1 Uniformity of Process. Uniformitarianism. states, “the present is the key to the past” 1. the geologic processes now at work were also active in the past. 2.
[DOC File]101 Amazing Earth Facts - Education World
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But a leading theory holds that our favorite satellite was carved partly from Earth shortly after the Earth formed. A Mars-sized object slammed into our fledgling planet. The impactor was destroyed. Stuff flew everywhere and a lot of it went into orbit around Earth. The Moon gathered itself together out of the largely vaporized remains of the ...
[DOC File]Chapter 1 Introduction to Earth Science
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When Earth formed, it had neither oceans nor atmosphere. Earth became hotter (compression, radioactive materials, meteorites) and iron melted and sank (core) As iron melted, it also melted other materials around it, releasing water and gases trapped in those materials.
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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.
[DOC File]Geology 111 – 50 Lab 1 Relative Time
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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 …
[DOCX File]The Formation of Earth - MR. HOLZ'S WEBSITE - Home
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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.
[DOC File]Loudoun County Public Schools / Overview
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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]Geology 110: Earth and Space Science
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Present on Earth. Formed from magma. Form exclusively at or near the surface. May form many kilometers below the surface. Example: Gneiss. Classification of this/these rock type(s) considers texture. Form beds. Can be deposited in running water. May form at a temperature of 500oC . Example: Andesite. May be composed of small grains or crystals
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