We must be careful what we drink ...

I found a very cute and funny video about energy drinks as it is a really important issue as their consumption is increasing in adolescents and especially mixed with alcohol, I found very good video for students to see and well perhaps consider.

Best of video is that it provides a solution for those times when we feel tired, we tomarsi instead of reloading the energy body.

Do you think it is necessary to teach teenagers about energy drinks?

With that theme each year it could link high school students?

Greenhouse...

I found a wonderful video on the Greenhouse Effect.
It explains very well why it happens.
What axions considered important to care the ozone layer?
How to prevent pollution?

Do you think you can really change the world?

I propose a CHALLENGE...

                                                                                                           

When water begins to evaporate quickly heats up to a
the point where boiling starts.


What do we do?
We will use a paper cup or a balloon piñata to heat water without these

harm comes containers!

Materials

Candle or a lighter

metal support

metal ring

Paper cups or rubber balloons

Procedure

Select a paper cup or a balloon piñata
Place the paper cup into a hoop attached to a support
Adds water to the glass or fill the balloon with water and tie it to the hoop or a clamp

Gently heated the glass with its contents using a candle or a lighter

with the appropriate calls and taking care not to burn

Continue heating. Can you make the water ebulla?

Remove the heat source and allow the water to cool

What happened?

The water absorbs the heat energy rather than paper, and no vessel temperature
rises above the water temperature.
Water is a liquid with a great capacity to absorb heat itself before
heated, thanks to the structure and arrangement of its molecules. It is known that
Water molecules in the solid and liquid states are connected by links 21
hydrogen and therefore large quantity of caloric energy is expended in such break
links; addition, the ignition point of the rubber is much lower than the point of
boiling water and burn before it reaches the water to boil.
It should be noted that the flame should not be too much for the Heat have the time
enough to be absorbed by the system without exceeding the boiling point
water.

To think ...

Why water is the ideal liquid to put out fires?
If water is heated in a glass beaker, why glass gets hotter
the water while the paper?

Chemistry Home and Daily Living

       The chemical industry, manufacturing cleaning products, personal care products and care for children, developing materials for building appliances and enabling optimal food preservation, has contributed decisively to facilitate housework. In primitive economies, engaged 16 hours a day for basic needs, and in the modern world, only two, due to detergents, easy to iron clothes and clean, or frozen foods, for example.

       Starting with the kitchen, she found coated plastic utensils that do not adhere food containers and furniture of the same material, ceramic plates, transparent wrapping films, skid pans, canned and prepared foods internally protected against the effect of fungi and bacteria.

If we move to the living room there are TV, video, audio player, CDs, and tapes ... all made ​​of chemical materials from the lining of the television screens, to magnetic media, passing compact discs.

And in all rooms are chemicals derived elements: carpets, upholstery, fabrics, stuffing pillows, soap, perfume, paint, adhesives, toys, detergents, insecticides, cosmetics ... Look around and find some object for which component not chemistry has played an important role ... and this exercise will be repeated in the plane, car or on the street.

        The chemistry we dress for every occasion: go to the field, swim in the sea, play sports, climb a mountain or go to a party. Natural fibers are difficult to modify and produce a relatively inefficient manner. Synthetic fibers can be altered to meet specific needs and are produced in large quantities easily. In addition, natural fibers are not as natural as they seem. Did you see the wool as the sheep produce, or how is the cotton, having no chemical protection is attacked by a plague of beetles?

      Chemistry also helps us gain higher yields in the use of food, allowing its storage and refrigerated transport, preserving their properties and extending their life, both in slaughterhouses, as in department stores, shops, and Finally, domestic refrigerators and freezers. All these devices work with cryogenic gases "clean" and are thermally insulated with synthetic foams.

Finally must be mentioned the enormous importance of packaging manufactured chemicals for food preservation. These innocent-looking containers are admirable technological pieces. They should be light and strong, and there composed of numerous different film layers, each with specific properties and functions. The selective permeability to gases such as carbon dioxide and oxygen and to moisture and light, polymer-based materials has been used to develop packaging inside a modified atmosphere. If barrier properties are suitably selected, a packaging material can maintain a modified atmosphere within the container, extending the "shelf life" of the product.

Dehydrated products must be protected from moisture during storage. Fatty foods must be protected from the air to reduce oxidation. The fresh fruit, by contrast, must breathe, and it is necessary that the gases circulate container. For all these needs, sometimes contradictory, chemistry has the necessary materials.

        It is also important to highlight the importance of plastics in reducing packaging waste. Because of its strength and light weight allow to develop the main strategy, which consists of the reduction at source, on the other hand paying for recycling and reuse, thus showing their eco-efficiency.

       I think the chemistry is really important because it is in everything we see constantly in our daily lives, so it is very important to teach. But teach it from this point of view, students can see that chemistry is tangible, is, that exists in the life of each one of them, not a scientifically unattainable world. How about you?, Would not it be much easier and fun for our students bring to reality what we teach?, How do you think you could teach chemistry and life at a time?