Will we run out of breathable oxygen?

The scientists think that the fitoplancton, principal source of atmospheric oxygen, may reach a critical point of dearth.

According to some American scientists, in some decades, humanity will face the problem of the lack of oxygen in the atmosphere due to the decreasing of filoplancton in the aquatic surface.

A group of scientists of Michigan’s University, observed the effect that the increasing temperature had on the fitoplancton’s metabolism while they were investigating the surface of the world’s oceans. The scientists confirm their theories about what will happen at the end of the century, a lack of filoplancton.

After examining about 130 species of filoplancton, especially the ones that develop on the temperature zone and the ones at the areas near the polar regions. finally, the biologists concluded that the fitoplancton must reproduce in lower temperatures that the ones that are present during the year.

So, according to some preliminary conclusions, the tropical species of filoplancton are more sensible to the global warming. Due to all these processes of climate change and the increasing of the temperatures, all the plankton of the tropical area could be reduced to the poles, where it can also disappear.

Burning oil, coal, gas, wood or other organic materials uses molecular oxygen, the O2 we breathe, to break carbon-hydrogen bonds and release energy. This reaction, better known as combustion, also pairs each broken-off, positively charged carbon atom with two negatively charged oxygen atoms, forming carbon dioxide, or CO2.

Although that does cut into the amount of O2 in the atmosphere, there's no need to fill your basement with oxygen tanks. Molecular oxygen, the O2 that we breathe, is the runner-up, at 20.94 percent.

Because of this relative bounty of oxygen, scientists don't fear that carbon emissions will cut off our oxygen supply. "Even if we were to burn another 1,000 billion tons of fossil fuels, we would only decrease the oxygen in our atmosphere to 20.88 percent," he says. And even then, the effects that action would have on the environment—more particulate pollution, hotter temperatures—would be far worse than oxygen depletion.

The conclusion is: It depends on the scientist. Personally I think that we will run out, but that would happen in a hypothetical situation, for example, if the sun disappears, if all the plants die…

https://youtu.be/TU1Ub6aXMqA

What would happen if all the elements of the periodic table came into contact simultaneously ?  by Eduardo Platas

        

The periodic table is the most important chemistry reference that exists. Is formed by all the chemical  ,ordered by their atomic number (number of protons), electron configurations, and recurring chemical properties. This ordering shows periodic trends, such as elements with similar behavior in the same column. Was invented by Russian scientist Dmitri Mendeleev in the 1869
 The gaseous oxygen would react with the lithium and sodium and it would inflame , the  temperature of the container in which we join the elements would increase until seemed hell.  There are lots of flammable elements in the periodic table , so the would all burn. There are  more or less twenty­five radioactive elements that if they are heated they produce a terrible  mixture. Plutonium and radioactive other elements , if they’re burnt they contaminate the air ,  which if we inhale , it causes the immediate death. But if we leave all the elements together  for a time , they would reach an equilibrium , and it would be a mixture of common and  stable compounds 

Reaction (Explosion) of Alkali Metals with Water

https://www.youtube.com/watch?v=HvVUtpdK7xw

Do dogs sweat from their tongues?

Do dogs sweat from their tongues?

Most people believe that the dog's tongue contains sweat glands, but this is not true.

Most of the dog's sweat glands are located around its foot pads. That is why, when a dog is overheated, you will sometimes see a trail of wet footprints that he has left behind as he walked across the floor.

But if this is proved, why is some people still thinking the other way round? That’s because the dog's tongue and mouth are associated with many salivary glands that produce different forms of saliva. For this reason we think that they just run with their mouth opened for not swallowing the sweat, but it’s for panting (a way cooling that moves air across saliva-moistened surfaces of the mouth cavity) which helps them to eliminate some heat.

Dogs also have other methods to keep cool, such as vasodilation which consists on dissipating heat by dilating (expanding) blood vessels in the face and ears. This helps to keep the dogs’ blood cooler by causing it to flow closer to the surface of the skin allowing it to cool before returning back to the heart. This mechanism works better if the overheating is due to exercise, rather than a high outside temperature. 

On a hot day, especially if the dog is very active, he can overheat (hyperthermia). This can eventually lead to heat stroke. A dog that is overheated will seem sluggish and perhaps confused. If you look at his gums and tongue they may appear bright red, and he will probably be panting very hard. If left unattended to, the dog may collapse, vomit, have a seizure, or even go into a coma.

If the sun disappeared today, how long would it take before Earth was uninhabitable?

 8.3 minutes is the time after which the Earth will not receive any sunlight forever but it will take some months to the Earths surface to cold down, all living things wich are used to cold weather won´t have a big problem with it until the Earth reached very low temperatures, temperatures all over the planet would reach around -140º making it uninhabitable.

The Earth won´t cold down completely until millions of years happened due to the molten rock inside the Earth and the inner energy and it´s movements.

There could be a posibility to the humans, or the living things in the Earth to survive but unfortunately it´s very difficult to carry out.

The nearest solar system is alpha centaury and as the sun dissapeared the Earth will stop rotating around it so all the energy will go as an impulse in wich the Earth will reach a new body to orbit around, that will be the only posibility tu survive but it would be imposible to reach Alpha Centaury on time, once the Earth cold down all humans will die and it will be almost imposible to a similar species to develop in the resolution of the years passing.  

 

As the sun dissapeared the Earth won´t rotate anymore around it so the magnetic field will be destroyed, and if solar radiation was still in the universe that could also ´cause damage to living organisms.        

As the centrifugal force was lost the shape of the Earth will change and the new distribution of the gravity will alter the oceans and some countries will sumerge, as the Earth loses the forces of the sun and the moon it will get completely flat becoming a perfect sphere.

WHY DO MOSQUITOES BITE SOME PEOPLE MORE THAN OTHERS?

WHY DO MOSQUITOES BITE SOME PEOPLE MORE THAN OTHERS?

Mosquitoes choose their victims based on the amount of carbon dioxide (CO2) emitted to breathe and not, as stated in the popular belief, the "sweetness" of the blood, according to a study published recently in Nature.

A human being produces every day about one kilogram of CO2 and exhales every time-about 13 times per minute, expelling more than one hundred milligrams of this gas. Mosquitoes detect a pulsating stream of CO2, from which they infer that behind there is "fresh blood" to suck. The carbon dioxide emitted breathing is higher in adults than in children, and its amount varies depending on diet and exercise that followed.

In fact, entomologists at the University of Florida (USA) have developed traps for these insects which emit carbon dioxide as a person or an animal.

Lactic acid we emit breathing or through sweat also attracts these insects. Taller people and pregnant women emit more CO2 and lactic acid, so they are a perfect target for mosquitoes. People who just do intense physical exercise are also very attractive for these insects.

https://youtu.be/qF513aVV9jc

what is the smallest animal in the world?

The smallest animal in the world is one type of species in anglerfish with a scientific name that is photocorynus spinice, in the family of linophrydinae.the mature male has a length between 6.2 and 7.3;it is consider also one of the strangests underwater animal because of its depth( 990-1,420 m)

The female is less longer than the male and their body is 55milimettres ;the male is attached to the middle of the back of a 46 mm long female because that is how they mate. It’s called sexual parasitism and in five of the 11 families of anglerfishes, the males are tiny compared to the females and fuse for life to their mates by biting onto the sides, backs or bellies of a female.

WHY DON´T SNOW STORMS PRODUCE THUNDERS AND LIGHTNINGS???

There is lightning in SOME snowstorms, only the strongest one.

Almost every summer there is a storm with lightning and Thunder. But even in the fiercest snow storms there is a sparkle in the air. Thunderstorms with snow are not impossible (although in all United States only are on average six a year), but winter air is not the most suitable for conditions requiring the lightning to form, says meteorologist Robin Tanamachi of the University of Oklahoma.

During  the summer, the troposphere is full of hot and humid air. Above, the air is cold and is full of ice crystals. When hot air rises, carrying water vapor molecules rubbing ice crystals and the friction creates an electric field in the cloud. Ice crystals acquire a slight positive charge and the updraft takes them to the top of the cloud, so that at the bottom is a net negative charge.

Lightning is caused by particles (liquid drops & ice) hitting against each other, which causes charge differences in the cloud. To get particles to hit, you need some upward motion of air which carries some particles up while others fall down.

Thundersnow: Rara tormenta de nieve con truenos en Kansas, EEUU (21/2/2013) CNN

PAULA MIGUEL GÓMEZ

               2B E.S.O