Wet Soil Smell After Rain

     Do you like the scent of wet earth after rain? If so, you are not alone. In fact, some scientists believe that people inherit their love for the scent of rain from their ancestors who rely on rain for their survival. But what makes the scent of wet earth after rain?

     There are some aromas associated with rainfall pleasant smelling man. One of the smell, which is called "Petrichor", the aroma that comes up when it rains after a prolonged dry spell.

     Petrichor - the term was coined in 1964 by two Australian scientists studying the smell of wet weather. Petrichor derived from the word 'Petros' Greek, which means stone and 'ichor', which means that the liquid flowing in the veins of the gods. It is defined as "a distinctive aroma that accompanies the first rain after a long dry season"

Petrichor comes from a pair of chemical reactions:

     Some plants produce oil during dry periods, and when it rains, this oil is released into the air. The second reaction which creates Petrichor occurs when chemicals called geosmin produced by Streptomyces bacteria that live on the ground, are released into the air. Both of these aromatic compounds combine to create Petrichor, pleasant aroma when the rain hits the ground.

     Bactrian camels can detect water from a distance of 50 miles away. This is because the aroma of Streptomyces easily carried across the desert and camel picked up by a sensitive nose. In return, the spores of the bacteria can be spread around. Musty earth scent of some cactus flowers are also derivatives of geosmin. Make pollinating insects comes with the promise of water. This is known as mimicry interest. Unfortunately, the fish also absorb some of the water geosmin not really feel it.

     Another scent of rain is associated with ozone. During storms, lightning can separate oxygen and nitrogen molecules in the atmosphere, and they in turn can recombine into nitric oxide. This substance interacts with other chemicals in the atmosphere to form ozone, which has a pungent smell fresh.

     When someone says they can smell the rain coming, maybe that wind from the storm has made ozone down from the clouds and into the nostrils of the person.

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What Happens If Suddenly the Earth Stopped Spinning ?

     As we all know, the Earth rotates on its axis, so that we experience day and night. Then what would happen if the earth suddenly stopped spinning? Remember, this will not be possible. Earth will only be slowed and slowed and then stopped in a few billion years, so do not worry. And these are the things that will happen if the earth suddenly stopped rotating.

Everything Will Be Launched on Ballistic trails.

     The first thing that needs to be taken into account is the momentum of everything on the earth's surface. We are all pressed by gravity and moving through space at a speed of rotation of 1674.4 km/h (at the equator). We did not feel it, because the momentum. Just as we do not feel as they move along an oncoming car on the highway. But we will feel the effects if the car suddenly stopped, or me-brake suddenly. So, if the earth suddenly stopped spinning, everything on the surface of the Earth's equator will suddenly moving with an initial velocity of 1.600 km/hour to the east. The escape velocity of the Earth is about 40.000 km/h, so the speed of the above is not enough to make us fly into space. But this is obviously going to cause some damage terrible because everything flew a ballistic trajectory to the east. Imagine the ocean water in the equatorial suddenly moving to the east at a rate of 1.600 km/h. The same thing is also experienced by the air that would cause a powerful storm that never happened !

     Earth's rotation speed decreases if we are far from the equator, toward the poles. So if we were further south or further north of the equator, the initial velocity of motion of our current earth suddenly stopped rotating, will be smaller than 1600 km/h. The more we get closer to the poles of the earth, our initial velocity will be smaller, even if we stand right at the north pole or south pole, we would barely feel it.

The day will last for 365 Days.

     The next problem is the day and night will never be the same again. When the Earth rotates on its axis, the Sun back to the same position every 24 hours. But if the Earth stopped spinning, it would take 365 days for the Sun to 'move in the sky' and return to the same position. Not only that, the direction of motion of the sun in the sky is no longer from east to west, but from west to east. Half of the Earth will be roasted light for half a year, while the other hemisphere in darkness. Earth will be very hot on the bright side and a very cold on the dark side. Such an event is obviously going to destroy plants and animals. And at the poles of the earth, only to experience a night for a whole week and then lunch also for a full week, and so on.

Earth will be shaped ball that Almost Perfect.

     This is a glimpse may be a small thing compared to other disasters, but the earth would be almost perfect sphere. When the earth is spinning on its axis, completing one revolution approximately every 24 hours. This causes the rotation speed of the Earth around the equator stand out, changing the shape of our planet into an oblate spheroid (flattened balls). If the earth is not rotating, the Earth's gravity will be able to form an almost perfect sphere. This sounded good and harmless, but actually it creates a big problem. Because the earth bulge in the middle, a sea of ​​stalling on the equator as far as 8 km. If the earth transformed into a ball, the world's oceans will pitch redistributed, inundating many regions of the planet with a large volume of water. We will end up with a single continent around the middle of the planet, the oceans surrounding the north pole and a south pole.

Earth No More Italic.

     The tilt of the earth is determined by how the planet rotates compared to the sun. Tilt the axis of rotation is defined seasons on earth. But if the earth without rotation, the concept does not make sense anymore. There is still a planet's north pole, where the radiation from the Sun is at its lowest angle, and the equator, a place that receives the most direct sun radiation. But there will be no season.

Earth will not be Protected from Radiation Dangerous to Life.

     If the Earth stopped spinning, there will be no magnetic field of the earth, because of the rotation of the earth was rotating molten metal core of the earth and generates a magnetic field. As a result, there will no longer Aurora and the Van Allen radiation belts that protect us from cosmic rays and other high-energy particles, will disappear. Things like this will destroy Life on planet Earth significantly.

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