BIG HISTORY Hist 111
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Geological Timeline
Geological Timeline In this pack you will find information and activities to help your class grasp the concept of geological time, just how old our planet is, and just how young we, as a species, are. Planet Earth is 4,600 million years old. We all know this is very old indeed, but big numbers like this are always difficult to get your head around. The activities in this pack will help your class to make visual representations of the age of the Earth to help them get to grips with the timescales involved. Important EvEnts In thE Earth’s hIstory 4600 mya (million years ago) – Planet Earth formed. Dust left over from the birth of the sun clumped together to form planet Earth. The other planets in our solar system were also formed in this way at about the same time. 4500 mya – Earth’s core and crust formed. Dense metals sank to the centre of the Earth and formed the core, while the outside layer cooled and solidified to form the Earth’s crust. 4400 mya – The Earth’s first oceans formed. Water vapour was released into the Earth’s atmosphere by volcanism. It then cooled, fell back down as rain, and formed the Earth’s first oceans. Some water may also have been brought to Earth by comets and asteroids. 3850 mya – The first life appeared on Earth. It was very simple single-celled organisms. Exactly how life first arose is a mystery. 1500 mya – Oxygen began to accumulate in the Earth’s atmosphere. Oxygen is made by cyanobacteria (blue-green algae) as a product of photosynthesis. -
Lecture 2 Our Place in the Universe (Cont'd)
Astronomy 110 –1 Lecture 2 Our Place in the Universe (Cont’d) 14/01/09 1 Copyright © 2009 Pearson Education, Inc. A few useful mathematical skills 14/01/09 2 Copyright © 2009 Pearson Education, Inc. Powers of ten 103 = 10 x 10 x 10 = 1000 102 = 10 x 10 = 100 101 = 10 100 = 1 10-1 = 1/10 = 0.1 10-2 = 1/10 x 1/10 = 0.01 10-3 = 1/10 x 1/10 x 1/10 = 0.001 Then: 300 = 3 x 100 = 3 x 102 2,500 = 2.5 x 1000 = 2.5 x 103 14/01/09 3 Copyright © 2009 Pearson Education, Inc. Multiplying & dividing 101 x 101 = 100 = 102 101 x 102 = 10 x 100 = 1000 = 103 102 x 102 = 100 x 100 = 10000 = 104 When multiplying two powers of ten, add the exponents 1000 ÷ 100 = 103 ÷ 102 = 10 = 101 10 ÷ 10 = 101 ÷ 101 = 1 = 100 10 ÷ 100 = 101 ÷ 102 = 1/10 = 10-1 When dividing, subtract exponent of divisor from exponent of numerator 14/01/09 4 Copyright © 2009 Pearson Education, Inc. Powers and roots (104)3 = 104 x 104 x 104 = 1012 Rule of thumb: when raising to a power, multiply exponents What about √(104)? √(104) = 102 taking roots is the same as raising to a fractional power, in this case 1/2 power: √(104) = (104)1/2 = 102 √ is the same as raising to 1/2 power 3√ is the same as raising to 1/3 power 4√ is the same as raising to 1/4 power 14/01/09 5 Copyright © 2009 Pearson Education, Inc. -
Critical Analysis of Article "21 Reasons to Believe the Earth Is Young" by Jeff Miller
1 Critical analysis of article "21 Reasons to Believe the Earth is Young" by Jeff Miller Lorence G. Collins [email protected] Ken Woglemuth [email protected] January 7, 2019 Introduction The article by Dr. Jeff Miller can be accessed at the following link: http://apologeticspress.org/APContent.aspx?category=9&article=5641 and is an article published by Apologetic Press, v. 39, n.1, 2018. The problems start with the Article In Brief in the boxed paragraph, and with the very first sentence. The Bible does not give an age of the Earth of 6,000 to 10,000 years, or even imply − this is added to Scripture by Dr. Miller and other young-Earth creationists. R. C. Sproul was one of evangelicalism's outstanding theologians, and he stated point blank at the Legionier Conference panel discussion that he does not know how old the Earth is, and the Bible does not inform us. When there has been some apparent conflict, either the theologians or the scientists are wrong, because God is the Author of the Bible and His handiwork is in general revelation. In the days of Copernicus and Galileo, the theologians were wrong. Today we do not know of anyone who believes that the Earth is the center of the universe. 2 The last sentence of this "Article In Brief" is boldly false. There is almost no credible evidence from paleontology, geology, astrophysics, or geophysics that refutes deep time. Dr. Miller states: "The age of the Earth, according to naturalists and old- Earth advocates, is 4.5 billion years. -
Confronting History on Campus
CHRONICLEFocusFocus THE CHRONICLE OF HIGHER EDUCATION Confronting History on Campus As a Chronicle of Higher Education individual subscriber, you receive premium, unrestricted access to the entire Chronicle Focus collection. Curated by our newsroom, these booklets compile the most popular and relevant higher-education news to provide you with in-depth looks at topics affecting campuses today. The Chronicle Focus collection explores student alcohol abuse, racial tension on campuses, and other emerging trends that have a significant impact on higher education. ©2016 by The Chronicle of Higher Education Inc. All rights reserved. No part of this publication may be reproduced, forwarded (even for internal use), hosted online, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law. For bulk orders or special requests, contact The Chronicle at [email protected] ©2016 THE CHRONICLE OF HIGHER EDUCATION INC. TABLE OF CONTENTS OODROW WILSON at Princeton, John Calhoun at Yale, Jefferson Davis at the University of Texas at Austin: Students, campus officials, and historians are all asking the question, What’sW in a name? And what is a university’s responsibil- ity when the name on a statue, building, or program on campus is a painful reminder of harm to a specific racial group? Universities have been grappling anew with those questions, and trying different approaches to resolve them. Colleges Struggle Over Context for Confederate Symbols 4 The University of Mississippi adds a plaque to a soldier’s statue to explain its place there. -
Earth: Atmospheric Evolution of a Habitable Planet
Earth: Atmospheric Evolution of a Habitable Planet Stephanie L. Olson1,2*, Edward W. Schwieterman1,2, Christopher T. Reinhard1,3, Timothy W. Lyons1,2 1NASA Astrobiology Institute Alternative Earth’s Team 2Department of Earth Sciences, University of California, Riverside 3School of Earth and Atmospheric Science, Georgia Institute of Technology *Correspondence: [email protected] Table of Contents 1. Introduction ............................................................................................................................ 2 2. Oxygen and biological innovation .................................................................................... 3 2.1. Oxygenic photosynthesis on the early Earth .......................................................... 4 2.2. The Great Oxidation Event ......................................................................................... 6 2.3. Oxygen during Earth’s middle chapter ..................................................................... 7 2.4. Neoproterozoic oxygen dynamics and the rise of animals .................................. 9 2.5. Continued oxygen evolution in the Phanerozoic.................................................. 11 3. Carbon dioxide, climate regulation, and enduring habitability ................................. 12 3.1. The faint young Sun paradox ................................................................................... 12 3.2. The silicate weathering thermostat ......................................................................... 12 3.3. Geological -
Global History and the Present Time
Global History and the Present Time Wolf Schäfer There are three times: a present time of past things; a present time of present things; and a present time of future things. St. Augustine1 It makes sense to think that the present time is the container of past, present, and future things. Of course, the three branches of the present time are heavily inter- twined. Let me illustrate this with the following story. A few journalists, their minds wrapped around present things, report the clash of some politicians who are taking opposite sides in a struggle about future things. The politicians argue from histori- cal precedent, which was provided by historians. The historians have written about past things in a number of different ways. This gets out into the evening news and thus into the minds of people who are now beginning to discuss past, present, and future things. The people’s discussion returns as feedback to the journalists, politi- cians, and historians, which starts the next round and adds more twists to the en- tangled branches of the present time. I conclude that our (hi)story has no real exit doors into “the past” or “the future” but a great many mirror windows in each hu- man mind reflecting spectra of actual pasts and potential futures, all imagined in the present time. The complexity of the present (any given present) is such that no- body can hope to set the historical present straight for everybody. Yet this does not mean that a scientific exploration of history is impossible. History has a proven and robust scientific method. -
The Solar System
The Solar System Our automated spacecraft have traveled to the Moon and to all the planets beyond our world The Sun appears to have been active for 4.6 billion years and has enough fuel for another 5 except Pluto; they have observed moons as large as small planets, flown by comets, and billion years or so. At the end of its life, the Sun will start to fuse helium into heavier elements sampled the solar environment. The knowledge gained from our journeys through the solar and begin to swell up, ultimately growing so large that it will swallow Earth. After a billion years system has redefined traditional Earth sciences like geology and meteorology and spawned an as a "red giant," it will suddenly collapse into a "white dwarf" -- the final end product of a star like entirely new discipline called comparative planetology. By studying the geology of planets, ours. It may take a trillion years to cool off completely. moons, asteroids, and comets, and comparing differences and similarities, we are learning more about the origin and history of these bodies and the solar system as a whole. We are also Mercury gaining insight into Earth's complex weather systems. By seeing how weather is shaped on other worlds and by investigating the Sun's activity and its influence through the solar system, Obtaining the first close-up views of Mercury was the primary objective of the Mariner 10 we can better understand climatic conditions and processes on Earth. spacecraft, launched Nov 3, 1973. After a journey of nearly 5 months, including a flyby of Venus, the spacecraft passed within 703 km (437 mi) of the solar system's innermost planet on Mar 29, The Sun 1974. -
Does the Rapid Appearance of Life on Earth Suggest That Life Is Common in the Universe?
ASTROBIOLOGY Volume 2, Number 3, 2002 © Mary Ann Liebert, Inc. Does the Rapid Appearance of Life on Earth Suggest that Life Is Common in the Universe? CHARLES H. LINEWEAVER 1,2 and TAMARA M. DAVIS 1 ABSTRACT It is sometimes assumed that the rapidity of biogenesis on Earth suggests that life is common in the Universe. Here we critically examine the assumptions inherent in this if-life-evolved- rapidly-life-must-be-common argument. We use the observational constraints on the rapid- ity of biogenesis on Earth to infer the probability of biogenesis on terrestrial planets with the same unknown probability of biogenesis as the Earth. We find that on such planets, older than ,1 Gyr, the probability of biogenesis is .13% at the 95% confidence level. This quan- tifies an important term in the Drake Equation but does not necessarily mean that life is com- mon in the Universe. Key Words: Biogenesis—Drake Equation. Astrobiology 2, 293–304. THE BIOGENESIS LOTTERY duction–oxidation pairs are common (Nealson and Conrad, 1999). UCHOFCURRENTASTROBIOLOGICALRESEARCH Mis focused on learning more about the early It is difficult to translate this circumstantial ev- evolution of the Earth and about the origin of life. idence into an estimate of how common life is in We may be able to extrapolate and generalize our the Universe. Without definitive detections of ex- knowledge of how life formed here to how it traterrestrial life we can say very little about how might have formed elsewhere. Indirect evidence common it is or even whether it exists. Our exis- suggesting that life may be common in the Uni- tence on Earth can tell us little about how com- verse includes: mon life is in the Universe or about the proba- bility of biogenesis on a terrestrial planet because, Sun-like stars are common. -
Alternate Constellation Guide
ARKANSAS NATURAL SKY ASSOCIATION LEARNING THE CONSTELLATIONS (Library Telescope Manual included) By Robert Togni Cover Image courtesy of Wikimedia. Do not write in this book, and return with scope to library. A personal copy of this guide can be obtained online at www.darkskyarkansas.com Preface This publication was inspired by and built upon Robert (Rocky) Togni’s quest to share the night sky with all who can be enticed under it. His belief is that the best place to start a relationship with the night sky is to learn the constellations and explore the principle ob- jects within them with the naked eye and a pair of common binoculars. Over a period of years, Rocky evolved a concept, using seasonal asterisms like the Summer Triangle and the Winter Hexagon, to create an easy to use set of simple charts to make learning one’s way around the night sky as simple and fun as possible. Recognizing that the most avid defenders of the natural night time environment are those who have grown to know and love nature at night and exploring the universe that it re- veals, the Arkansas Natural Sky Association (ANSA) asked Rocky if the Association could publish his guide. The hope being that making this available in printed form at vari- ous star parties and other relevant venues would help bring more people to the night sky as well as provide funds for the Association’s work. Once hooked, the owner will definitely want to seek deeper guides. But there is no better publication for opening the sky for the neophyte observer, making the guide the perfect companion for a library telescope. -
The Philosophy of History
THE PHILOSOPHY OF HISTORY Georg Hegel THE PHILOSOPHY OF HISTORY Table of Contents THE PHILOSOPHY OF HISTORY................................................................................................................1 Georg Hegel.............................................................................................................................................1 I.Original History....................................................................................................................................1 II. Reflective History..............................................................................................................................2 III. Philosophic History............................................................................................................................5 iii. The course of the World's History..................................................................................................29 i THE PHILOSOPHY OF HISTORY Georg Hegel This page copyright © 2001 Blackmask Online. http://www.blackmask.com • I.Original History • II. Reflective History • III. Philosophic History I.Original History ¤ 1 Of the first kind, the mention of one or two distinguished names will furnish a definite type. To this category belong Herodotus, Thucydides, and other historians of the same order, whose descriptions are for the most part limited to deeds, events, and states of society, which they had before their eyes, and whose spirit they shared. They simply transferred what was passing in the world -
The Age of the Universe: One Reality Viewed from Two Different Perspectives by Gerald Schroeder #Can the Universe Be Young and Old Simultaneously?
The Age of the Universe: One Reality Viewed from Two Different Perspectives By Gerald Schroeder #Can the universe be young and old simultaneously? For centuries, science and theology have been locked in an ideological battle as to the ultimate source of truth. And basic to this standoff is the question of the age of our universe. Is it an old universe with a history containing fossils of dinosaurs and cavemen, or young with just a few days passing between the creation of the universe and the creation of Adam, the first human being? And if our universe is young, then the so-called ancient fossils were placed in the ground by God to test our faith in the truth of the Bible. The old age measure of our universe is based on research by astronomers and cosmologists. These scientists measure how much light waves from distant galaxies are stretched and lengthened due to the stretching of the space of the universe as those light waves travelled over eons of time to reach us here on earth. The data embedded in those stretched rays of light reveal that our magnificent universe was created at just under 14 billion years ago. The young age measure of our universe is based on data in the Bible. The opening chapter of Genesis states that six days passed between the creation of the universe and the creation of Adam. Then in Genesis, Chapter 4 we read that Adam and Eve had two sons, Cain and Abel. Cain murdered Abel and Cain was exiled by God. -
New Model of Abiogenesis
Goldschmidt2020 Abstract New model of abiogenesis A. IVANOV1, V. SEVASTYANOV1, A. DOLGONOSOV1 AND E. GALIMOV1 1Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academу of Sciences, Kosygina street 19, Moscow 119334, Russia ([email protected]) Understanding the nature of the causes that led to the beginning of the structural self-organization of protobionts is a fundamental question in finding solutions to the problem of abiogenic origin of life. The main difficulties in understanding the question - how this happened, arise due to the fact that after 4 billion years of geological and biological activity of the planet, direct material evidence, the complex process of spontaneous generation of living matter, was not found. But is it possible, with a detailed examination of the geophysical and geochemical features of the situation of the early Earth, to restore the history of the sequence of prebiological events that predetermined the formation of protocellular precursors of the first living organisms? After all, in fact, having embarked on this path, you can trace the order of formation of prebiotic structures reveal the principle of self-organization of primary biological matter, and eventually come to a pristine type of living matter. Probably, the primary living matter required not only special conditions, but also special location that could protect and maintain its existence for a long time, since the aggressive environment of the primitive Earth would not allow primitive life to develop without such protection. This is due to the various kinds of exposure to hard cosmic radiation, as well as the adverse effects of other physical and chemical factors.