Xem 1-20 trên 166 kết quả Fossil
  • As in a past decades, the world today continues to be at crossroads in terms of energy. Shortages and rising prices of fuel, accompanied by environmental damage are leading to a poor quality of life. Fossil fuel consumption is increasing, and our search for oil has led to ever deeper reserves, with its higher production costs. Rapid depletion of oil and gas are real issues affecting both current and future generations.

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  • Trẻ em là một đối tượng học viên đặc biệt, chúng thường tiếp thu những kiến thức mới theo cách không giống người lớn đặc biệt và tiếng Anh. Vậy thời điểm nào là thích hợp để dạy ngoại ngữ cho trẻ em, và nên chọn những cuốn sách như thế nào cho phù hợp. Mời các bạn cùng tham khảo nội dung cuốn sách "Fossils and dinosaurs" để có thêm tài liệu phục vụ nhu cầu dạy tiếng Anh cho trẻ

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  • Tham khảo sách 'fossil vertebrates of arabia_1', nông - lâm - ngư, nông nghiệp phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf373p japet75 30-01-2013 17 1   Download

  • The most popular energy sources being used today (fossil fuels) are finite and will need to be replaced in the future. The possible sources of energy which can be used in place of fossil fuels each have their own advantages and disadvantages. In chapter 12, we will learn the energy from fossil fuels. This chapter also provide a description of the various types of fossil fuels including their sources and methods used for their extraction.

    ppt17p tangtuy07 02-04-2016 5 1   Download

  • Students can learn historical and geographical terms in context. With high-interest history and geography articles even below average students and reluctant learners will understand words such as archeologist, fossil, emperor, eon, nomads, glaciers, dipolmat, artifact, and more.

    pdf114p truonglong_bmt 03-05-2012 140 79   Download

  • With shortages of fossil energy and heavy biomass energy use occurring in both developed and developing countries, a major focus has developed worldwide on renewable energy systems. Currently, a heavy focus is on biofuels made from crops, crop residues and wood. Though it may seem beneficial to use renewable plant materials for biofuel, their use raises many concerns about major environmental problems, including food shortages and serious destruction of vital soil resources.

    pdf513p chipmoon 19-07-2012 137 54   Download

  • The very latest research is uncovering a stream of evidence revealing evolution in action - from the actual observation of a species splitting into two, to new fossil discoveries, to the deciphering of the evidence stored in our genome. Why Evolution is True weaves together the many threads of modern work in genetics, palaeontology,geology, molecular biology, anatomy, and development to demonstrate the 'indelible stamp' of the processes first proposed by Darwin. It is a crisp, lucid, and accessible statement that will leave no one with an open mind in any doubt about the truth of evolution....

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  • "Energy for a Warming World" challenges the commonplace notion that the amount of power which mankind can potentially harness from renewable resources is more than large enough to assuage future demand levels. By examining the renewable issue from an electrical engineering perspective, and exercising due regard for the limited capability of current and future electrical generation and transmission systems, this book attempts to provide more realistic statistics for the levels of power which could be extracted from sustainable resources in the critical time frame of 30 to 40 years....

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  • The present work is a review of all the organisms thus far reported from Lebanese amber. Various paleoentomologists have contributed to the study of Lebanese amber insects. Studies by Paul Whalley, once at the British Museum, have been especially useful. However, works like ours are also made possible by those who go into the field and search for amber sites. Scientists are indebted to these individuals since, without their zeal, there would not be many scientific descriptions of amber fossils or books like the present one....

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  • Laetoli in northern Tanzania is one of the most important paleontological and paleoanthropological sites in Africa. It is renowned for the recovery of early hominin fossils belonging to A. afarensis and for the discovery of remarkably well-preserved trails of footprints of hominins. Given the significance of Laetoli for understanding and interpreting the evolutionary history of early hominins the author initiated long-term geological and paleontological investigations at Laetoli and at other fossil localities on the Eyasi Plateau.

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  • This volume presents the results of research on Arabian continental vertebrates discovered in the United Arab Emirates, the Sultanate of Oman, and the Republic of Yemen. The contributors provide information on Arabian palaeontology, stratigraphical, geological, isotropic and palaeomagnetic topics.

    pdf573p japet75 30-01-2013 16 3   Download

  • Chapter 4: Earth's past provides about fossils (What are fossils? How do fossils form? Life of a Dinosaur); Finding Clues in Fossils (What clues can you find in this fossil? How can fossils help us learn about the past? What can fossils teach us about extinct animals?..); Fossils of California

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: " Theoretical size distribution of fossil taxa: analysis of a null model

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  • This extensively illustrated volume brings together for the first time the results of research on Arabian continental vertebrates discovered in the United Arab Emirates, the Sultanate of Oman, and the Republic of Yemen. Eminent scientists from Arabia, Europe, and the United States provide up-to-date information on Arabian paleontology as well as on Arabian stratigraphical, geological, isotopic, and paleomagnetic topics. The book presents new fossil records· from Arabia and Pakistan and discusses the closing of the ancient Middle East Tethy s seaway....

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  • Both high import payments for petroleum motor fuels and concerns regarding emissions of carbon dioxide (CO2) are motivating interest in possible fuel substitutes. Petroleum products derived from conventional crude oil constitute more than 50 percent of end-use energy deliveries in the United States and more than 95 percent

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  • Global warming is the rising average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's average surface temperature has increased by about 0.8 °C, with about two thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that most of it is caused by increasing concentrations of greenhouse gases produced by human activities such as deforestation and the burning of fossil fuels.

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  • Năng lượng thay thế ( Alternative energy ) là năng lượng thu được từ những nguồn ngoài 3 dạng Nhiên liệu hóa thạch ( Fossil Fuel ): Than đá ( coal ), Dầu mỏ ( oil ) và Khí tự nhiên ( Natural gas ). Những nguồn năng lượng thay thế này bao gồm: Năng lượng hạt nhân ( Nuclear power ), Năng lượng mặt trời ( Solar power ), Năng lượng gió ( Wind power ),Năng lượng địa nhiệt ( Geothermal energy ), Năng lượng sinh khối ( Biomass energy ), Năng lượng nước ( Hydropower ) và một...

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  • Improvements in agriculture health and medicine have produced a dramatic rise in the human population This increase in population size leads to an increase in pollution and higher demand for the world’s resources. Humans are using up the earth’s resources, including fossil fuels.

    ppt23p kinhthuytinhmau 05-08-2010 183 78   Download

  • With the depletion of oil resources as well as the negative environmental impact of fossil fuels, there is much interest in alternative energy sources. Focusing on some of the most important alternate energy sources for the foreseeable future, the Handbook of Plant-Based Biofuels provides state-of-the-art information on the status of the production of biofuels, in particular, bioethanol and biodiesel. After profiling plant-based biofuels, the book gives an overview of the production of biofuels from biomass materials by thermochemical and biochemical methods.

    pdf292p ktct_1669 03-05-2012 88 51   Download

  • Tình trạng năng lượng ngày càng khan hiếm trên thế giới, đặc biệt là các loại năng lượng hoá thạch (fossil fuels) như dầu khí và than đá. Hiện nay, giá dầu thô đã bước qua ngưỡng cửa 90 Mỹ kim và có nhiều chỉ dấu sẽ tăng lên 100 Mỹ kim trong một tương lai không xa cũng như trữ lượng dầu ...

    doc19p nguyenhanh92 26-06-2013 121 48   Download

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