Video science

http://sciencehack.com/

GAMES-VIDEOS

http://www.sciencekids.co.nz/gamesactivities.html

http://www.sciencemuseum.org.uk/onlinestuff/games/

http://resources.woodlands-junior.kent.sch.uk/revision/science/

http://www.scienceworld.ca/sites/default/files/flash/games/engagingscience/index.html

http://www.physicsclassroom.com/Class/newtlaws/u2l1a.cfm

http://science.discovery.com/games-and-interactives/newtons-laws-of-motion-interactive.htm

http://science.k12flash.com/newton3lawsmotion.html

http://teachertech.rice.edu/Participants/louviere/Newton/laws.html

SCIENCE FAIR

Science fair ppt:

http://www.slideshare.net/matias_lopera-A/science-fair-ppt?utm_source=ss&utm_medium=upload&utm_campaign=quick-view
Br: Matias Lopera

Science fair

   hairspary science fair


http://es.slideshare.net/7054839/hairspray-scf


by: Andrés correa

Chemical proces

§Chemical:

§-Burning

§-Electrolisis

§-Neutralization

§- Corrison

§-Reduction

§-Ionization

§-Fermentation

§What is chemical: In its most basic form, a chemical is an element, in that it has a specific molecular composition and may be produced by or used during a natural chemical process.

§ An element is a chemical substance made of specific kinds of atoms that cannot be broken down any further; in short, elements are the purest forms of chemicals known to man.

§When multiple chemicals combine, a chemical compound is formed, which exists in order to combine different types of elements, and therefore, different reactions.

§What is chemical burning: Most chemical burns occur on the face, eyes, hands, arms, and legs. Usually a chemical burn will be relatively small and will require only outpatient treatment. Chemical burns can be deceiving, however. Some agents can cause deep tissue damage that is not readily apparent when people first look at it.

§Tissue damage from chemical burns depends on several factors.

§Chemical Electrolisis: how electrolysis can cause a chemical reaction to occur, suppose we pass a direct electrical current through 1 M HCl. The H3O+ ions in this solution will be attracted to the cathode, and the Cl– ions will migrate toward the anode. At the cathode, H3O+ will be reduced to H2 gas according to the half-equation.

§2H+ + 2e– → H2      (1a) 

§Chemical neutralization:  chemical reaction, according to the Arrhenius theory of acids and bases, in which a water solution of acid is mixed with a water solution of base to form a salt and water; this reaction is complete only if the resulting solution has neither acidic nor basic properties. Such a solution is called a neutral solution. Complete neutralization can take place when a strong acid, such as hydrochloric acid, HCl, is mixed with a strong base, such as sodium hydroxide, NaOH. Strong acids and strong bases completely break up, or dissociate, into their constituent ions when they dissolve in water.

§Chemical Ionization: (EI) was introduced by Field and Munson (1966).  Their work stemmed from earlier observations that some molecules introduced into an EI source at high pressure would generate ions of the type [M+H]+ rather than the conventional M+ molecular ion.  This process, which became known as "self - CI" generated stable molecular species, so Field and Munson sought to deliberately generate this type of species from a wide range of molecular classes.

§§Chemical Fermentation: originally, the foaming that occurs during the manufacture of wine and beer, a process at least 10,000 years old. That the frothing results from the evolution of carbon dioxide gas was not recognized until the 17th century. Louis Pasteur in the 19th century used the term fermentation in a narrow sense to describe the changes brought about by yeasts and other microorganisms growing in the absence of air (anaerobically); he also recognized that ethyl alcohol and carbon dioxide are not the only products of fermentation.

By: Matías lopera

PHYSICAL AND CHEMICAL PROPERTIES

§Physical and Chemical Properties

§All substances have properties that we can use to identify them. For example we can identify a person by their face, their voice, height, finger prints, DNA etc.. The more of these properties that we can identify, the better we know the person. In a similar way matter has properties - and there are many of them. There are two basic types of properties that we can associate with matter. These properties are called Physical properties and Chemical properties:

§

§Physical properties:  Properties that do not change the chemical nature of matter

§Chemical properties:  Properties that do change the chemical nature of matter

§Physical properties are those that can be observed without changing the identity of the substance. The general properties of matter such as color, density, hardness, are examples of physical properties. Properties that describe how a substance changes into a completely different substance are called chemical properties. Flammability and corrosion/oxidation resistance are examples of chemical properties

§Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density. There are many more examples. Note that measuring each of these properties will not alter the basic nature of the substance.

§

§Examples of chemical properties are: heat of combustion, reactivity with water, PH, and electromotive force.

§

§The more properties we can identify for a substance, the better we know the nature of that substance. These properties can then help us model the substance and thus understand how this substance will behave under various conditions.

§The difference between a physical and chemical property is straightforward until the phase of the material is considered. When a material changes from a solid to a liquid to a vapor it seems like them become a difference substance. However, when a material melts, solidifies, vaporizes, condenses or sublimes, only the state of the substance changes. Consider ice, liquid water, and water vapor, they are all simply H2O. Phase is a physical property of matter and matter can exist in four phases – solid, liquid, gas and plasma.

PHYSICAL PROCES

§A sustained phenomenon or one marked by gradual changes through a series of states

§DESTILATION:Distillation is a widely used method for separating mixtures based on differences in the conditions required to change the phase of components of the mixture. To separate a mixture of liquids, the liquid can be heated to force components, which have different boiling points, into the gas phase.

§

§EVAPORATION Evaporation is the process by which water is converted from its liquid form to its vapor form and thus transferred from land and water masses to the atmosphere. Evaporation from the oceans accounts for 80% of the water delivered as precipitation, with the balance occurring on land, inland waters and plant surfaces.

§FILTRATION:The act or process of filtering, especially the process of passing a liquid or gas, such as air, through a filter in order to remove solid particles.

§

§DECANTATION:Decantation is a very quick method for separating a mixture of a liquid and a heavier solid.

BY: MATIAS LOPERA