Chapter 25: History of Life on Earth Synthesis of Organic Compounds on Early Earth * The Earth probably formed about 4.6 billion years ago‚ and was bombarded with rocks and other material until about 3.9 billion years ago. * The Earth then cooled‚ allowing for the formation of oceans. Scientists hypothesize the general atmosphere‚ or at least some regions‚ were naturally reducing environments‚ meaning that they added electrons to compounds. * Activation energy provided by lightening
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When we think of prehistoric bones and fossils we think of dinosaurs and creatures of huge amount of size‚ but the findings of Kennewick Man changed the very thought of prehistoric beings. So exactly who is the Kennewick Man and why is he so important? Why is he given such a name as to Kennewick Man? Why would anyone want to fight and file lawsuits on each other to for a pile of old dusty bones? Well that’s what is found here on the case of “Kennewick Man.” Scientist and Native Americans just can’t
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1. PETROLEUM TRAPS http://www.usoilandgas.net/findingoil.htm Hydrocarbons - crude oil and natural gas - are found in certain layers of rock that are usually buried deep beneath the surface of the earth. In order for a rock layer to qualify as a good source of hydrocarbons‚ it must meet several criteria. Characteristics of Reservoir Rock For one thing‚ good reservoir rocks (a reservoir is a formation that contains hydrocarbons) have porosity. Porosity is a measure of the openings in a rock‚ openings
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1. A ________ is a well-tested and widely accepted view that best explains certain scientific observations. Answer | | hypothesis | | | generalization | | | law | | | theory | 2 points Question 2 1. What are the basic differences between the disciplines of physical and historical geology? Answer | | physical geology is the study of fossils and sequences of rock strata; historical geology is the study of how rocks and minerals were used in the past |
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Biology Fall 2011-2012 Exam Review [pic][pic] The graphs above show the results of two separate experiments on the same species of plant. Students now want to determine how the use of rainwater or bottled water affects the growth of this plant. Which conditions should be used for optimal growth as the two water types are tested? Answer:_______________________________________________________________________________________________________________ WHY?____________________________________
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Layer A formed? A. 65.5–145.5 mya B. 201.6–145.5 mya C. 251–201.6 mya D. 299–251 mya Answer Key: B Question 5 of 31 3.0/ 3.0 Points During what period were the fossils in Layer A formed? A. Cretaceous Period B. Triassic Period C. Jurassic Period D. Cambrian Period Answer Key: C Question 6 of 31 3.0/ 3.0 Points Record your answer to Lab Exercise‚ Step 3‚ Question 15. How long ago were the fossils
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DISCOVERY OF EARTH’S HISTORY: “FOSSILS” I.OBJECTIVES 1. WHAT IS FOSSILS? 2. HOW THEY WERE FORMED? 3. FOSSILIZATION PROCESSESS 4. FOSSILS RECORD 5. TYPES 6. PSEUDOFOSSILS 7. HISTORY OF THE STUDY OF FOSSILS 8. TRADING AND COLLECTING 9. IMAGE GALLERY II.DISCUSSION FOSSILIZATION PROCESSESS Permineralization Permineralization is a process of fossilization that occurs when an organism is buried. The empty spaces within an organism
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Adaptive Radiation Adaptive radiation occurs most often in new environment with a variety of different unfilled niches so that plants and animals that are not adapted to those areas can exploit the resources in the respective niches. Once individuals begin exploiting the new niches‚ mutations that will benefit the species will spread throughout the population via natural selection giving the owners an overwhelming advantage over others without the mutation and throughout evolutionary time
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6. History of OriginThe Origin of the Ant stems back even further than we originally thought. A new D.N.A. study which included researchers from Harvard University states that they evolved around 140 to 168 million years ago in the Jurassic or Cretaceous period1. This is significant when we analyze how Ants became so successful and diverse. They evolved from the same common ancestor family as wasps called Vespoidea (1999 Denis J. Brothers)7 the similarity is clear in the family velvet ant (Mutillidae
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Urban ecosystem and Ecopolis Lai Wei March 29‚ 2012 Introduction When people talk about the city‚ the first thing they thought is the building and the traffic. It’s hard to connect city to the ecological and the environment. But as the humanity is rapidly urbanizing‚ by 2010‚ more than 50% of the world population is expected to live in the city. (The World Bank‚ 2010) Cities can be tremendously efficient. It can easier to provide water and sanitation for a large number of people living
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