Discover the world's most endangered species Wildscreen's Arkive project was launched in 2003 and grew to become the world's biggest encyclopaedia of life on Earth. With the help of over 7,000 of the world’s best wildlife filmmakers and photographers, conservationists and scientists, Arkive.org featured multi-media fact-files for more than 16,000 endangered species. Freely accessible to everyone, over half a million people every month, from over 200 countries, used Arkive to learn and discover the wonders of the natural world. Since 2013 Wildscreen was unable to raise sufficient funds from trusts, foundations, corporates and individual donors to support the year-round costs of keeping Arkive online. Therefore, the charity had been using its reserves to keep the project online and was unable to fund any dedicated staff to maintain Arkive, let alone future-proof it, for over half a decade. Therefore, a very hard decision was made to take the www.arkive.org website offline in February 2019.
Periodic Table of the Elements by WebElements Origin of the Chemical Elements During the process of stellar evolution nuclear fusion reactions take place within a star. These give rise to the formation of the chemical elements. Clues to the processes involved may be deduced from the graph below, which shows the cosmic abundances of elements (y-axis) plotted against atomic number (x-axis). The abundances are measured relative to 1 million silicon atoms and the y-axis is a logarithmic scale. There are three important observations to be made from this graph: The graph has (overall) a smooth trend from left to right, that is from light to heavy elements. It is thought that the early Universe consisted almost entirely of the element hydrogen, with a small amount of helium present too. Early in star development hydrogen is utilised to manufacture the element helium. Elements heavier than iron are formed by the addition of neutrons which are absorbed by the atomic nucleus. You may wish to follow up this section with visits to the following sites:
How to teach ... gravity As the saying goes, what goes up must come down (unless it goes into hyperbolic orbit). Felix Baumgartner's spectacular skydive from the edge of space was a perfect demonstration of gravity at work – gravity pulled the Austrian sportsman as closely as it could towards the Earth's centre and 10 heart-stopping minutes later he landed safely on the ground in a triple world record, including breaking the sound barrier for the first time. Students will be fascinated to find out all about the Austrian sportsman's record-breaking skydive and to watch the mesmerising video. For Lego fans don't miss this incredible reconstruction. So what is gravity and how does it work? The Guardian Teacher Network has plenty of resources to help you explore this fascinating force. First of all it's worth pointing out the surprising fact that despite being responsible for the formation of whole galaxies, gravity is a very weak force.
Games@NOAA Elements 4D by DAQRI Sustainability & Endangered Elements | Chemistry Description of Contents I. "Rare Earths: Resource Sustainability". Abstract of an article to be published in The Rare Earth Elements: Fundmentals and Applications (October 2012). II. To obtain a copy of the Endangered Elements Periodic Table (shown below) and to get more information on this subject see: III. A. B. C. IV. I. Chapter in The Rare Earth Elements: Fundamentals and Applications, October 2012 David A. Abstract Rare earth elements have unique electronic, optical, luminescent, and magnetic properties that make them critically important in a broad range of products and applications. Keywords: Sustainability, Strategic Elements, Endangered Elements Article Contents: II. Choice Literacy - Articles & Videos - Full Article "Do you know what I've been thinking and reading about?" asked Will as we settled into an out-of-the-way spot in my grades 3-4 multiage classroom. It was time for reading workshop and the room was quietly buzzing as readers gathered books and other resources, settled into their places, and the hum of engaged learners slowly crept across the room. Will's green eyes were sparkling with excitement as we began our reading conference. "What's on your mind?" "I'm studying the creek for my micro-habitat study, right?" He showed me two books and an article printed from a website. "So what's your plan for today?" "I want to use my time today to answer a few of my wonder questions about raccoons. "Tell me more," I prompted, starting to jot notes in my conference notebook. I was eager to see what Will had to share. After posting students' micro-habitat questions on our Wonder Board, students worked with a partner and selected at least three of their wonder questions to answer. . He was puzzled.
Wildlife & Nature Videos | Clips | Photos | Programmes - itvWILD K12 Periodic Table of the Elements