10 Incredible Chemical Reaction GIFs Explained We encounter thousands of chemical reactions every day: plants use them in photosynthesis, metals rust over time, and combustion reactions provide us with heat and light, among thousands of other daily uses. Chemical reactions occur when reactants transform into new substances, called products, through creating and breaking bonds between atoms. Sometimes the process creates some pretty wild effects. Wolf and the Owl There once was a wolf that lived in a great valley known by many animals. One night on an evening hunt, the wolf heard from a distance, mysterious but beautiful songs. He had never heard them before. He was so enchanted by these strange yet wonderful songs that he went to investigate where they were coming from.
Electron Distributions Instructions Before viewing an episode, download and print the note-taking guides, worksheets, and lab data sheets for that episode, keeping the printed sheets in order by page number. During the lesson, watch and listen for instructions to take notes, pause the video, complete an assignment, and record lab data. See your classroom teacher for specific instructions. Note Taking Guide
WebGL Water Loading... Made by Evan Wallace This demo requires a decent graphics card and up-to-date drivers. Elements & Periodic Table Now we're getting to the heart and soul of the way the Universe works. You know that a generic atom has some protons and neutrons in the nucleus and some electrons zipping around in orbitals. When those pieces start combining in specific numbers, you can build atoms with recognizable traits. If you have eight protons, neutrons and electrons, you will have an oxygen (O) atom. Glossary 09 October 2007 Glossary Absentee voting Absentee voting allows voters who cannot come to polling places a means to cast a ballot. A variety of circumstances, including residency abroad, illness, travel or military service, could prevent voters from coming to the polls on Election Day.
Dark matter is the thread connecting galaxy clusters Simulations of the Universe on the largest scales show an unexpected resemblance to nerve cells in the human brain, with galaxy clusters playing the role of the cell body and thinner filaments of matter linking them like axons. Galaxy surveys (such as the Sloan Digital Sky Survey, or SDSS) show that galaxies do cluster like our simulations predict. But the filaments that should connect them have been harder to find. Most of the mass in the Universe is dark matter—material that neither emits nor absorbs light—and filaments are predicted to be mostly dark matter: no galaxies, little hot gas. Einstein's general theory of relativity, however, tells us mass affects the path of light, and a group of astronomers have identified a dark matter filament by measuring this effect.
ChronoAtlas - The Interactive Historical Atlas of the World The Second Punic WarContributed by caadmin Carthage had suffered immensely from the First Punic War, not only had she lost Sicily, but she also lost her naval superiority over Rome. Furthermore the war indemnity Rome forced upon Carthage bankrupted her. Four New Elements Added To The Periodic Table Enlarge The periodic table of the elements Scientists just filled in a few gaps in the periodic table of elements. Elements with atomic numbers 113, 115, 117, and 118 have been added to the periodic table. The Official Epic Rap Battles of History Website Albert Einstein Hello there. I’m a theoretical physicist from Germany. I created the the theory of general relativity that unifies the ideas of gravity. I also created the idea of “spacetime,” which combines space and time and might actually prove time travel is possible . I know, I know, science can get a little boring, which is why I’m also crazy eccentric.
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.