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Science fair smokefall


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Science fair smokefall

  1. 1. The Smokefall Hyejin Lee
  2. 2. QuestionHow to make asmokefall?
  3. 3. HypothesisIf we put on fire thepaper, then the smokeis going to fall.
  4. 4. MaterialsEmpty bottleLighterPiece of paper
  5. 5. ProcedureMake a hole in the top of your bottle.Stick it in the hole the piece of paper.Light on the fire in the piece of paper.
  6. 6. ResultThe smokefall is formbecause of the air andgases.
  7. 7. Background
  8. 8. ProyectosSimilares How to Make a Smoke Ring Launcher How can you make the invisible ring of air visible? With a little smoke, of course. The best smoke rings are made by filling the trash can with theatrical smoke. Smoke machines (foggers) are commonly used in stage productions. Check to see if your theater department has one, or see if you can borrow one from the disc jockey who plays for your school dances. The best smoke rings are also made by gently tapping the shower curtain. A hard smack results in a fast blast of air that is difficult to see. The flying vortices are best seen against a dark background with light coming from either side.
  9. 9. Does smoke rise or goes down?First we do a couple of holes in the bottle of plastic, one in the top part and another onenear the base of the bottle.Then we take the sheet paper and cut away a rectangle of 10x15 cm.We coil the paper to obtain a small cylinder of approximately 15 cm of length.Finally the small tube of paper interferes for the top hole of the bottle.On having ignited the small tube of paper with a match a small flame is formed and isobserved that for another end of the bead there goes out a column of very dense smokethat falls down inside the bottle. In the exterior scarcely there is smoke.If we cover the low hole with a finger the small tube of paper goes out and smoke doesnot go out.Explanation:On having burned the small tube it departs from the paper it is clear in the shape ofparticles that, together with the gases that are formed in the combustion and the air theyform the smoke.In normal circumstances, the smoke ascends dragged by the warm air of thecombustion (currents of convection).In our experiment, the smoke that takes place is produced in the interior part of the smalltube travels along it.Inside the bottle there is no warm air, so that when the smoke goes out for the low end ofthe small tube there do not take place (there are not produced rising currents ofconvection) and the smoke (denser than the air) it rushes to the bottom of the bottle.
  10. 10. Smoking beagle experimentsDr. Oscar AuerbachAt one point, He"trained" 86 beagles tosmoke in experiments where 12developed cancer. It was said to be thefirst instance of tumors produced inlarge animals exposed to tobaccosmoke. However, it is not clear why thisparticular study was given validity overprevious studies in large (and small)animals, which failed to producecancer. The American Cancer Society,which financed much of the research,announced that the results "effectivelyrefute contentions by cigarette-manufacturing interests that there wasno cigarette-cancer link." The responseof the Tobacco Institute, an industrytrade group, was that it was"impossible" to draw conclusions fromwork on dogs subject to such"stressful" laboratory conditions."
  11. 11. Ferias Mundiales de Ciencia Feria Mundial de Ciencias de Google La feria de ciencias de Google ha comenzado. Y Google cree que fomentar la competencia en el campo de las ciencias así como se fomenta en los deportes o en la música, sobre todo en los mas jóvenes, es el verdadero futuro. Por lo que junto a CERN, The LEGO Group, National Geographic and Scientific American idearon la Google Science Fair, La Feria de Ciencias de Google en la que los participantes deberán tener entre 13 y 18 años y el único requisito es tener una computadora, una conexión a internet y un navegador.
  12. 12. Ferias Mundiales De Ciencia Las ferias mundiales y la fascinación con la ciencia y el progreso. A partir de la segunda mitad del siglo XIX, tres tipos de exhibiciones y exposiciones adquirieron presencia: La primera fue la Exhibición Industrial, dedicada al estímulo de una industria específica, o de todas las industrias de un determinado país o región. Ejemplos de este tipo fueron la exhibición de productos de cuero en Berlín, 1877;de impresión en Nueva York, 1900; y de artes modernas, decorativas e industriales en París, 1925. Un segundo tipo de exhibición, fue regional y dedicada a la conmemoración de eventos históricos. Este tipo de ferias es particularmente popular en los Estados Unidos. Dentro de este tipo estan la exposición de los grandes lagos en Cleveland, 1936. El tercer tipo, son las Exposiciones Mundiales que generalmente son patrocinadas por un gobierno nacional y presentan una amplia variedad de productos. Estos eventos han llegado a convertirse en elaborados sitios de exhibición para desarrollos técnicos y culturales, así como