Pulse of the Planet : Sounds of science, nature and culture Vocabulary Strategies It is vital that teachers give students the tools for acquiring their own rich vocabulary. Students will learn many words when they encounter them in meaningful contexts, but other words must be directly taught . Repeated meaningful encounters with words in read-alouds, in conversation, in personal reading, in discussion, or in media viewing can lead students to build vocabulary over time. Think Aloud Vocabulary Self-Selection Strategy Contextual Redefinition PAVE Procedure List-Group-Label Language Collection Sheet Student VOC Strategy Word Banks 12 Powerful Words That Challenge Students on Standardized Tests Websites on Vocabulary Strategies: Vocabulary Strategies for Secondary Students A List of Vocabulary Strategies All America Reads Vocabulary Strategies - PDF
Exploratorium: the museum of science, art and human perception Free Resources Close If you are trying to view the videos from inside a school or university, your IT admin may need to enable streaming on your network. Please see the Internet Filtering section of our Technical Requirements page. DVDs AND OTHER COPIES Videos on this page are not available on DVD at this time due to licensing restrictions on the footage. Subscribers to NBC Learn may download videos and play them back without an internet connection. Still have questions? The Science of the Olympic Winter Games videos are only available to visitors inside the United States due to licensing restrictions on the Olympics footage used in the videos. The Science of the Olympic Winter Games is not available on DVD at this time due to licensing restrictions on on Olympic footage.
Deutschlandfunk - Programmtipp Von Frank Grotelüschen 2012 erlebte die Physik einen heiß ersehnten Triumph - die Entdeckung des Higgs-Teilchens durch den Genfer Superbeschleuniger LHC. Das Higgs war der letzte noch fehlende Baustein des "Standardmodells", des derzeitigen Theoriegebäudes der Physik. Fieberhaft fahnden Fachleute inzwischen nach einer noch umfassenderen und grundlegenderen Theorie. Bislang hat der LHC zur Enttäuschung mancher Experten noch keine Indizien aufgespürt. Hinweis: Die ist der zweite Teil der Serie "Vorstoß in die Schattenwelt".
Journal home : Nature Raphael Lis, Charles C. Karrasch, Michael G. Poulos, Balvir Kunar, David Redmond, Jose G. Barcia Duran, Chaitanya R. Badwe, William Schachterle, Michael Ginsberg, Jenny Xiang, Arash Rafii Tabrizi, Koji Shido, Zev Rosenwaks, Olivier Elemento, Nancy A. Speck, Jason M. Q&A: What is dark matter? And how do we know it exists? - Science - News How do we know it exists if we cannot see it? We know it is there from the gravitational effect it has on the objects we can see, like the stars and galaxies. Scientists estimate that about 24 per cent of the Universe is composed of this “missing mass”, with the rest made up of dark energy, which is forcing the Universe to expand at an ever-faster rate. What is dark matter made of? There have been two competing theories. How does the AMS work? It cannot detect neutralinos directly, but can detect the particles given off when they collide in a process known as annihilation. What are the results of AMS? It has detected an excess of positrons, indicating the existence of neutralinos, but these could still come from distant pulsars – rotating neutron stars.
NOVA Can Wind Turbines Make You Sick? Residents living in the shadows of wind turbines say the sound is making them sick. But so far the science isn't there. From NOVA Next | Jun 27, 2018 Thirty Years Ago Today, Global Warming First Made Headline News On June 23, a NASA climate scientist, James Hansen, told a U.S. From NOVA Next | Jun 23, 2018 New Middle Eastern Particle Accelerator’s Motto is “Science for Peace” In a region in turmoil, an unprecedented joint venture of scientists and policymakers is working together on Jordan’s new particle accelerator under the motto "science for peace." From NOVA Next | Jun 21, 2018 Psychological Damage Inflicted By Parent-Child Separation is Deep, Long-Lasting Here's what happens in the brain and the body when a child is forcibly separated from his or her parents.
An end to our darkest secret? Scientists close to explaining dark matter - Science - News The first results of a £1.3bn experiment on the International Space Station suggest that dark matter is composed of sub-atomic particles that permeate all regions of space, with a combined gravitational force that influences the movements of the biggest objects, from planets and solar systems to stars and galaxies. For decades, cosmologists have argued over the nature of dark matter. Estimates show that we can see only about 5 per cent of the matter in the universe – composed of visible objects such as stars and galaxies – and that a further 24 per cent of mass is in the form of invisible dark matter, with the rest of the Universe composed of something even more mysterious called dark energy. Now the alpha magnetic spectrometer (AMS) instrument on the space station has detected the strongest signs yet that dark matter may indeed be composed of sub-atomic particles known as neutralinos, which are so weakly-interacting that they pass straight through the Earth without stopping.
Life on Earth under threat from CO2 levels, say scientists - Climate Change - Environment Current CO2 emissions are currently tracking on the highest trajectory envisaged by climate scientists. That means if nothing is done to reduce emissions significantly over the coming decades, over half of common plants and one-third of the animals could see a serious decline, the study concluded. Scientists came to the assessment by estimating the current and future geographical ranges of nearly 50,000 widespread and common species to see how rising temperatures are likely to affect their territorial limits as defined by the sort of climate they are adapted to live in. Plants, amphibians such as frogs and toads, and reptiles such as lizards are the groups that are likely to suffer the most from a changing climate because of their relative vulnerability to rising temperatures and inability to move rapidly from one territory to another, the study found.
EZB-Entscheidung: Draghi gibt Banken Zucker – und droht mit der Peitsche - Konjunktur Soziale Netzwerke dauerhaft einschalten BratislavaDie Banken in der Euro-Zone können sich noch mindestens ein Jahr lang unbegrenzt Geld bei der Europäischen Zentralbank (EZB) leihen. Diese Regelung werde mindestens bis zum 9. Juli 2014 verlängert, kündigte EZB-Präsident Mario Draghi am Donnerstag an. „Unsere Maßnahmen kommen allen Banken zu Gute“, sagte Draghi. Ursprünglich wäre die Rundumversorgung im Juli 2013 ausgelaufen. Bei ihrer Sitzung in Bratislava senkte die Europäische Zentralbank ihren Schlüsselzins von 0,75 auf das Rekordtief von 0,5 Prozent. Billiges Geld: Schlechte Zeiten für Sparer Warum macht die EZB das Geld im Euroraum noch billiger? Die EZB könnte die Banken zu einer stärkeren Kreditvergabe animieren, indem sie künftig eine Art Strafgebühr zahlen müssen, wenn sie Geld bei der Zentralbank parken. Banken können Geld bei der EZB parken, wofür sie in normalen Zeiten Zinsen bekommen. Stimmen zum Zinsentscheid der EZB Die Zinsschritte der EZB in der Krise 8.
Every Black Hole Contains a New Universe Inside Science Minds presents an ongoing series of guest columnists and personal perspectives presented by scientists, engineers, mathematicians, and others in the science community showcasing some of the most interesting ideas in science today. (ISM) -- Our universe may exist inside a black hole. This may sound strange, but it could actually be the best explanation of how the universe began, and what we observe today. Successful as it is, there are notable unsolved questions with the standard big bang theory, which suggests that the universe began as a seemingly impossible "singularity," an infinitely small point containing an infinitely high concentration of matter, expanding in size to what we observe today. But these theories leave major questions unresolved. The idea that our universe is entirely contained within a black hole provides answers to these problems and many more. The first is general relativity, the modern theory of gravity.
Field Guide to X-ray Astronomy :: Stellar Evolution Stellar Evolution The Milky Way Galaxy contains several hundred billion stars of all ages, sizes and masses. One of the central quests of astronomy is to understand how these star form, shine for billions of years, and eventually fade quietly into the dark as white dwarf, or go out with a bang as supernovas. Chandra and other X-ray telescopes focus on the high-energy action of this drama - sudden outbursts on the turbulent surfaces of stars, gale-force outflows of gas from hot, luminous stars, and awesome shock waves generated by supernova explosions. Overview of Stellar Evolution A Star is Born A star is born when a cloud of gas and dust collapses to the point where the material in the center of the clump is so dense and hot that the nuclear fusion of hydrogen nuclei into helium nuclei can occur. Hydrogen Burning Core (Main Sequence) Fusion of hydrogen into helium in the core of star can sustain a star such as the Sun for billions of years. Red Giants. Mass Matters.
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