The Shapes of Snowflakes Click to Enlarge In the Northern Hemisphere at least, the idealised vision of Christmas involves snow. Whilst no one snowflake is exactly the same as another, at least on a molecular level, scientists have none-the-less devised a system of classification for the many types of crystals that snow can form. Chemistry resources for Teachers and Students Search over 2000 substance pages for compound structures, properties, spectra, and more. Teaching analytical chemistry? Spectraschool is a great place to start.
Bear Sleeping Bag Cool bear shaped sleeping bag, designed by Eiko Ishizawa from Amsterdam, will keep you warm and scare your friends when you go camping. Please be warned that, according to the artist, it is not his responsibility if a wild bear attacks you, or some silly hunter hunts you down. For more designs, check out: Unique and Creative Sleeping Bags
Chemistry Review Activities I re-organized the course during the 2014 - 2015 school year. Some review activities were moved to new units. This has resulted in a change to some of the file names, so direct links to the individual activities may need to be changed. These are not graded assignments. How to Trick Your Brain for Happiness This month, we feature videos of a Greater Good presentation by Rick Hanson, the best-selling author and trailblazing psychologist. In this excerpt from his talk, Dr. Hanson explains how we can take advantage of the brain’s natural “plasticity”—it’s ability to change shape over time. gobyg
The Haber process - Daniel D. Dulek Haber received much criticism for his involvement in the development of chemical weapons in pre-World War II Germany, both from contemporaries and from modern-day scientists. The research results show the ambivalence of his scientific activity: on the one hand, development of ammonia synthesis for the manufacture of explosives and of a technical process for the industrial manufacture and use of poison gas in warfare; but on the other hand, development of an industrial process without which the food supply for today's world population would be greatly diminished. For more information, read Between Genius and Genocide: The Tragedy of Fritz Haber, Father of Chemical Warfare by Daniel Charles.
December 15 - On This Day in Chemistry He discovered radioactivity from uranium (U) salts and was awarded the Nobel Prize in Physics in 1903 along with Pierre and Marie Curie. Related Resources Bizarre sea slug is half plant, half animal It looks like any other sea slug, aside from its bright green hue. But the Elysia chlorotica is far from ordinary: it is both a plant and an animal, according to biologists who have been studying the species for two decades. Not only does E. chlorotica turn sunlight into energy — something only plants can do — it also appears to have swiped this ability from the algae it consumes. Native to the salt marshes of New England and Canada, these sea slugs use contraband chlorophyll-producing genes and cell parts called chloroplasts from algae to carry out photosynthesis, says Sidney Pierce, a biologist at the University of South Florida in Tampa.
chemsoc - for everyone interested in the chemical sciences We want everyone to experience the excitement and value of the chemical sciences. Our members and supporters reach out to connect people - from schoolchildren to scientists to political leaders - with chemistry. Whether you want to attend or run an event, set up a meeting or spend a few minutes writing an email, find out in this section how to get involved. Also in Campaigning & outreach: GoFlow: a DIY tDCS brain-boosting kit Did you know that by attaching a 9-volt battery to your scalp — with the help of some electrodes and some wet sponges (or conducting gel) — you can more than double your brain’s learning rate and boost peak performance? It sounds crazy, but it has now been proven by multiple studies that transcranial direct-current stimulation (tDCS) can significantly speed up your brain. In one case, the US Air Force used tDCS on trainee drone pilots to halve their learning time; likewise, DARPA has used tDCS to speed up the training of snipers. In another study, carried out by the University of New Mexico, test subjects learned how to play a video game twice as quickly while under tDCS, and played the game with heightened performance. Furthermore, tDCS has been shown to have therapeutic effects on people with neurological issues, such as Parkinson’s disease or post-stroke motor dysfunction. And best of all, it’s safe!
Under the hood: The chemistry of cars - Cynthia Chubbuck Based on the graph above, maximum protection from freezing the liquid in the cooling system occurs with a mixture of 66% ethylene glycol and 34% water. Based on the graph above, the minimum percentage of ethylene glycol that must be used in a radiator to prevent the fluid from freezing at –25°C is 40%. There are two substances that are commonly used as the solute in a car radiator. Ethylene glycol (EG) is the traditional choice, but propylene glycol (PG) is gaining a foothold in the market. In comparing solutions using the two substances, an EG solution is more effective at lowering the freezing point and is better at transferring the heat away from the engine. A 50:50 mixture of EG and water freezes at -37°C while a similar solution of PG freezes at -34°C.
CEF (Chemical Educational Foundation): You Be The Chemist Welcome to You Be The Chemist! The Chemical Educational Foundation's You Be The Chemist® (YBTC) programs are designed to enhance K-8 science education by introducing the central role of chemistry in all the sciences and in our everyday lives. To accomplish its mission, CEF relies on the collaboration of industry, educators, and all members of a community to enhance science education among every generation, beginning with our youth. CEF's current YBTC programs include: YBTC Essential Elements YBTC Essential Elements is designed to assist K–8 educators—our “essential elements” in education—in teaching chemistry concepts through hands-on learning and connecting those concepts to students’ everyday lives.
5 of the Coolest Staircases Ever Anyone wanting or already in the process of redesigning their multi-level home should take a look at these cool staircases, which break away from the standard design and add some creative flair. Continue reading to see them all. [via Toxel] 1. Top 10 Amazing Chemistry Videos Fiery explosions, beautiful reactions, and hilarious music videos are great reasons to be excited about chemistry. Here are some of our favorites. 10. Thermite vs. Liquid Nitrogen The British science show Brainiac asked one of the greatest scientific questions of all time: can liquid nitrogen freeze molten iron? 9.