Build an Atom - Phet Topics Atoms Atomic Structure Isotope Symbols Atomic Nuclei Description Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas! Sample Learning Goals Use the number of protons, neutrons, and electrons to draw a model of the atom, identify the element, and determine the mass and charge.Predict how addition or subtraction of a proton, neutron, or electron will change the element, the charge, and the mass.Use the element name, mass, and charge to determine the number of protons, neutrons, and electrons.Define proton, neutron, electron, atom, and ion.Generate an isotopic symbol for an atom, given the number of protons, neutrons, and electrons. Pictures, stories, and facts about the element Hydrogen in the Periodic Table Actinolite asbestos. The name "asbestos" used to mean a wonder-material, an insulator without equal and a strengthening fiber so cheap and strong it was used in building materials worldwide. Today the name means nothing but death and ruin. Asbestos had been used so widely and for so long that it must have seemed beyond credibility when evidence first started appearing that it might be harmful. The answer lies in its shape. The fibers are not just fine, they are ultra-fine: The ends of the natural fibers taper down to molecular sharpness, with a tip that is literally no more than a few atoms across. The ability to touch, and damage, DNA makes asbestos fibers potent carcinogens: Remarkably, unlike virtually all other carcinogens, they cause cancer purely mechanically, not chemically or by radiation. In principle asbestos could cause cancer anywhere in the body, but it's the lungs that are most vulnerable. The most serious disease caused by asbestos is mesothelioma, a form of cancer.
Top 10 Mad Science-Worthy Chemistry Experiments Chemistry is a fascinating science, but it's often taught poorly in today's boring schools. Here's how chemistry should be taught: by mad scientists! Here's Neatorama's list of the Top 10 Mad Science-Worthy Chemistry Experiments: 1. [YouTube Clip] The Briggs-Rauscher reaction is a well known example of oscillating chemical reactions, also known as chemical clocks because the periodicity can be used to tell time. 2. Who'da thunk that Gummy Bear can be so ... violent? [YouTube Clip] 3. Mentos in various carbonated liquids. You've all seen this before. MythBusters explain: According to Hyneman (he's the mustachioed MythBuster), it's a process called "nucleation," in which the particular chemistry of the Mentos candy interacts with the chemistry of the carbonated Diet Coke, causing the carbon dioxide gas, or CO2, to suddenly come out of suspension in the liquid and make a break for freedom. [...]Hyneman says, "There's a cascade that happens with -- it's a little esoteric -- an ion exchange.
Physics I: Classical Mechanics | Physics Jeux en classe - web pédagogique Grâce à Ghislaine Bellocq, je découvre sur Facebook une série de 25 images, « Iconic Painters to Guess », à partir de laquelle on peut faire deviner des peintres célèbres. Travail sur la description, sur la narration, sur l’hypothèse, sur l’argumentation, etc. en perspective. C’est certes fort pointu par moments, mais on n’est pas obligé d’utiliser toutes les cartes, et on peut en faire fabriquer d’autres (et pourquoi pas, tant qu’on y est, des icônes d’écrivains, de chanteurs, de…) Pour découvrir les images, dont je n’ai pas retrouvé l’auteur original (elles sont sur le site flickr de M. Spezzapria). c’est par ici: PS: la liste des artistes n’est pas fournie en suivant le lien; la voici:
Chemistry is EASY! How do you write electron configurations? Practical Physics This website is for teachers of physics in schools and colleges. It is a collection of experiments that demonstrate a wide range of physical concepts and processes. Some of the experiments can be used as starting-points for investigations or for enhancement activities. Many have links to carefully selected further reading and all include information and guidance for technicians. Physics is a practical science. Practical activities are not just motivational and fun: they can also sharpen students’ powers of observation, stimulate questions, and help develop new understanding and vocabulary. Good quality, appropriate physics experiments and investigations are the key to enhanced learning, and clarification and consolidation of theory. We have published a new set of resources to support the teaching of practical science for Key Stages 3-5.
Références - Nombres et opérations Dans cette partie, vous trouverez l'ensemble des livres que j'ai consultés lors de l'écriture de ce cours. Les livres sont donnés par ordre alphabétique de leurs auteurs. Physique - Aristote - GF Flammarion - 1999 Nouvelles tables de logarithmes - Bouvart et Ratinet - Librairie Hachette - 1957 Élémentaire, mon cher Watson ! - C. Œuvres complètes - Buffon G. A History Of Mathematical Notations - Vol I: Notations In Elementary Mathematics - F. The book of Numbers - J. Encyclopédie Kangourou des mathématiques au collège - A. L'étoile mystérieuse - Hergé - Casterman - 1942 On the notion of mean (Selected works of A.N Kolmogorov, Mathematics and Mechanics) - A. Les casse-tête mathématiques de Sam Loyd - S. "Haha" ou l'éclair de la compréhension mathématique - M. Zéro - D. Des mathématiciens de A à Z - B. Erdös, l'homme qui n'aimait que les nombres - P. L'algèbre au temps de Babylone - J. Quelques aspects de la pensée d'un mathématicien - P. Dr. Philosophiae Naturalis Principia Mathematica - I.
Matter: Chemical vs. Physical Changes It is important to understand the difference between chemical and physical changes. Some changes are obvious, but there are some basic ideas you should know. Physical changes are usually about states and physical states of states. When you melt an ice cube (H2O), you have a physical change because you add energy. Chemical changes happen on a much smaller scale. Melting a sugar cube is a physical change because the substance is still sugar. Iron (Fe) rusts when it is exposed to oxygen gas in the air. Some chemical changes are extremely small and happen over a series of steps. The sugars glucose, galactose, and fructose all have six carbon atoms, twelve hydrogen atoms, and six oxygen atoms (C6H12O6). Each of the sugars goes through different chemical reactions because of the differences in their molecular structure. Or search the sites for a specific topic.
High School Physics and AP Physics Online Welcome to the Frontpage D’ores et déjà, en prenant en considération les remarques du conseil de classe du 2nd trimestre vous devez déterminer quels sont vos vœux d’orientation et les hiérarchiser. Vous pourrez en faire au maximum trois. On vous donnera la semaine du 13 mai une feuille : « la fiche navette » sur laquelle vous pourrez les écrire. · Si vous demandez une première technologique (STMG, STI2D, STAV, ST2S …) ou une première S spécialité SI : vous devez télécharger et remplir la fiche PAM (pré affectation multi critères) suivante : ici · Si vous demandez un redoublement, une seconde professionnelle ou un CAP il vous faudra télécharger et remplir la fiche PAM suivante : ici · Si vous demandez une 1ère professionnelle vous devez télécharger et remplir la fiche de demande d’adaptation du parcours de formation suivante : ici ou si votre ordinateur ne peut lire les fichier XPS : imprimez les pages 9 et 10 du document ici Moyennes Pièces à fournir Une enveloppe timbrée à 20g à l’adresse de la famille. Date limite