Chemistry game online,free science games for kids to play on PC,fun interactive activity for middle,high school students Chemikul is an online science/ chemistry-based game that will send you on an atomic mind-bender of confusion – as well as provide endless hours of enjoyment! With super-slick ambient graphics and simple acoustics, it’s a learning experience that anyone can enjoy. The goal is to create molecules using all of the atoms floating in the game screen. Win the game by using up the Valence of each atom. How To Play: Use your computer mouse to make connections between the atoms by holding down the left mouse button and then joining to the other atoms.
Babies See Pure Color, but Adults Peer Through Prism of Language When infant eyes absorb a world of virgin visions, colors are processed purely, in a pre-linguistic parts of the brain. As adults, colors are processed in the brain’s language centers, refracted by the concepts we have for them. How does that switch take place? And does it affect our subjective experience of color? Such tantalizing questions, their answers still unknown, are raised by this developmental shift in color categorization, described today in the Proceedings of the National Academy of Sciences. To test the phenomenon, a team of British and English researchers asked adults and infants to focus on a briefly flashing target circle. Sometimes the target appeared in the subjects’ right visual fields – roughly speaking, the right half of a person’s field of vision, which is transmitted from the eyes to the brain’s left hemisphere, where language processing also takes place. Does this mean that adults and infants see the same colors differently? But might adults see colors differently?
Quantitative chemistry Quantitative chemistry is a very important branch of chemistry because it enables chemists to calculate known quantities of materials. For example, how much product can be made from a known starting material or how much of a given component is present in a sample. Quantitative analysis is any method used for determining the amount of a chemical in a sample. The amount is always expressed as a number with appropriate units. Understand the core ideas in quantitative chemistry Explain how the core ideas of quantitative chemistry develop and progress throughout secondary education Identify common misconceptions and know how these can be addressed Confidently and competently teach aspects of quantitative chemistry to secondary aged students Access a range of activities and resources to support students in their learning of quantitative chemistry
How Much Sleep Do You Really Need? Sleep is one of the richest topics in science today: why we need it, why it can be hard to get, and how that affects everything from our athletic performance to our income. Daniel Kripke, co-director of research at the Scripps Clinic Sleep Center in La Jolla, Calif., has looked at the most important question of all. In 2002, he compared death rates among more than 1 million American adults who, as part of a study on cancer prevention, reported their average nightly amount of sleep. Q: How much sleep is ideal? A: Studies show that people who sleep between 6.5 hr. and 7.5 hr. a night, as they report, live the longest. Morbidity [or sickness] is also "U-shaped" in the sense that both very short sleep and very long sleep are associated with many illnesses—with depression, with obesity—and therefore with heart disease—and so forth. I think we can speculate [about why people who sleep from 6.5 to 7.5 hr. live longer], but we have to admit that we don't really understand the reasons.
General Chemistry Online Common Compound Library A searchable database of over 800 common compound names, formulas, structures, and properties. Companion Notes Hyperlinked notes and guides for first semester general chemistry. Construction Kits Flash-based kits for building chemical formulas, names, equations, and problem solutions. Articles Featured articles, books, and tutorials. Toolbox Interactive graphing, popup tables, and calculators. Tutorials Index of self-guided tutorials, quizzes, and drills on specific topics. How Believing Can Be Seeing: Context Dictates What We Believe We Scientists at UCL (University College London) have found the link between what we expect to see, and what our brain tells us we actually saw. The study reveals that the context surrounding what we see is all important -- sometimes overriding the evidence gathered by our eyes and even causing us to imagine things which aren't really there. The paper reveals that a vague background context is more influential and helps us to fill in more blanks than a bright, well-defined context. This may explain why we are prone to 'see' imaginary shapes in the shadows when the light is poor. Eighteen observers were asked to concentrate on the centre of a black computer screen. Every time a buzzer sounded they pressed one of two buttons to record whether or not they had just seen a small, dim, grey 'target' rectangle in the middle of the screen. "Illusionists have been alive to this phenomenon for years," continued Professor Zhaoping.
Welcome to the Chemical Education Digital Library A Beginner's Guide to Muslim Bioethics | Wired Science from When Sunni and Shiite scholars disagreed over the ethics of cloning animals, I wondered whether there were other bioethical conflicts in the Muslim world. Are Muslims split over stem cell research and genetically engineered crops? Generally speaking, do they approach biotechnologies in the same way — or variety of ways — as Western cultures? I posed the question to a handful of Muslim bioethicists. The first to respond was Brown University anthropologist Sherine Hamdy. Wrote Hamdy, I think it would be easy and reductionist to make this into yet another ‘Shiite vs. Would it be a bit too easy and reductionist, I asked, to then say that Muslims are less inclined to take an absolutist position and instead base their judgments by weighing the risks and benefits of each case? King Faisal University bioethicist Hamza Eskandarani [pdf] followed up with a list of medical and reproductive technologies permitted under Sharia law: Interesting stuff, and in some ways more progressive than I expected.
ChemCollective Health | Single brain cell's power shown There could be enough computing ability in just one brain cell to allow humans and animals to feel, a study suggests. The brain has 100 billion neurons but scientists had thought they needed to join forces in larger networks to produce thoughts and sensations. The Dutch and German study, published in Nature, found that stimulating just one rat neuron could deliver the sensation of touch. One UK expert said this was the first time this had been measured in mammals. The complexity of the human brain and how it stores countless thoughts, sensations and memories are still not fully understood. Researchers believe connections between individual neurons, forming networks of at least a thousand, are the key to some of its processing power. However, in some creatures with simpler nervous systems, such as flies, a single neuron can play a more significant role. This could mean that, within a single neuron, different synapses could be storing or processing completely different bits of information.
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