So as you know rain has a distinct smell much like a pleasent and relaxing one so today we are gonna learn and know all about it. So let's startSo That pleasant, earthy scent unleashed by a downpour has a name, and it's the result of a reaction between the soil and the rainAnd the smell of rain is actually called petrichor

What Is All About The Smell Of Rain

Petrichor (/ˈpɛtrɪkɔːr/) is the earthy scent produced when rain falls on dry soil. The word is constructed from Greek petra (πέτρα), "rock", or petros (πέτρος), "stone", and īchōr (ἰχώρ), the fluid that flows in the veins of the gods in Greek mythology. Petrichor is the term coined by Australian scientists in 1964 to describe the unique, earthy smell associated with rain. It is caused by the water from the rain, along with certain compounds like ozone, geosmin, and plant oils

What Is Petrichor And Where Does It Come From

So plants and mud have a smell just like your ice-cream so when the water droplet touches the mud and makes it wet When lightning strikes,diatomic molecules of oxygen and nitrogen (containing 2atoms) are split, and rearrange to create nitric oxide (NO)and ozone, or O3. Ozonemolecules are carried down by droplets of rain to contribute to the scent. It is also helped by Actinomycetes, a type of bacteria found in soil, secrete a compound called geosmin , which is released from soil into the air by raindrops. Geosmin in the air can be detected by the human nose at less than 5 parts per trillion

How Does It Form

And also During dry weather, plants produce compounds that accumulate in between rocks and in soil. When it rains, these compounds are released into the air to add to the earthy smell of petrichor It also used the help of Stearic acid and palmitic acid they are common plant oils. They are fatty acids with a long hydrocarbon chains with a carboxyl group on one end and a methyl group on the other.Palmitic Acid (C16H32O2) Stearic Acid (C18H36O2)

How Does It Form Pt2

In 2015, scientists from the Massachusetts Institute of Technology (MIT) used high-speed cameras to record how the scent moves into the air. The tests involved approximately 600 experiments on 28 different surfaces, including engineered materials and soil samples. When a raindrop lands on a porous surface, air from the pores forms small bubbles, which float to the surface and release aerosols. Such aerosols carry the scent, as well as bacteria and viruses from the soil.

Extra/Fun Thing To Know

Raindrops that move at a slower rate tend to produce more aerosols; this serves as an explanation for why the petrichor is more common after light rains. Actinomycetes is the bacterium responsible for producing spores in soil.

End/Continuation

So in conclusion we got to learn a lot about the smell of rain or petrichor so I hope you enjoy the lesson and I will meet you again later

Conclusion

I have always wonder what the smell of rain is all about and I got to learn it and I was fascinated to I thought I should share it to you guys too

Creations

What is the smell of rain

Spring 2020 marked the largest drop in global seismic noise in recorded history. It took a pandemic to shut us up for a while. Listening to silence is not the absence of noise; it is the willingness to listen to ever-present non-human noise. By listening, we begin to see the world anew. A new book by nature photographer and explorer Pete McBride invites us to celebrate the art of listening to nature and to reconnect with our ancestral need of being in the world.

Seeing silence ...

We humans are a noisy bunch. With our machines, trucks, sirens, horns, beeps, loudspeakers, airplanes, and lawnmowers, we have surrounded ourselves with the deafening sounds of progress. To be in a city is to cordon nature on the outside. The timid tweets and cooing of birds, rain hitting the pavement, and the occasional thunder are a few of the only sounds we hear from within our homes, if we bother to turn off the TV or computer or smartphones to pause to listen.

We evolved to have a profound sound acuity. This was a must if our species was to survive in the jungles and the savannahs by protecting ourselves from predators and enemies and finding food and safe shelter. Being attuned to the natural world meant not only seeing things but hearing them. At night, seeing with our ears, building a spatial perception of our surroundings unaided by images, was a matter of life or death. Our ancestors could reconstruct a whole environment — the kinds of animals, the direction of the wind, if water was near or far, the weather patterns — by quietly listening.

Silence is not the opposite of noise; it’s the opposite of not wanting to listen. Even in the wildest, most remote places, there is noise. If there is air and atmosphere, there is sound. Unless you are in outer space (where there is no air and hence no support for propagating soundwaves), silence — understood to be the total absence of sound — is more an idea, an aspiration.

The beauty of this magical medicine called silence is that it is available to all of us, even in cities, if only we care to listen.

Words

Seeing silence: what nature tells us if we listen

As mentioned in Kojiki, a night shower beneath celestial maidens is something very spiritualIn addition, Japanese people known for being punctual,would prefer to do the thorough washing in the evening bwfode going to bed to cut down on prep time in the morning. Moreover, they work long and hard hours during the day thus making post-work relaxation full body bath an integral part of their lives.Many still like to take a quick shower in the morning even though they had a long bath the previous night. However, during harsh winters most opt out of the morning shower.

WhY do Japanese People Prefer To Take Bath At Night

Japan is a place where certain customs and rituals might seem unusual to a Westerner's eye. One of these is the fact that many Japanese people love to take a bath at night before they sleep, rather than in the morning before they head outside. Have you ever wondered why?,Related posts: The Road to Hell and Celebrating Death in Japan How to say “NO” in Japan? Why do the Japanese always clean? Cleanliness in Japan All about the Imperial Seals of Japan

Culture

Why Do Japanese People Love Taking a Bath at Night Before Going to Bed? – Japan Info

We are surrounded by sound waves. Sound has the power to communicate ideas, scare us, entertain us, even help us fall in love. Sound waves are a kind of energy that is launched when an object vibrates. These waves travel through a medium like air or water. When they reach your eardrum, the brain translates the pressure waves into words or music.

Sound waves are a type of power

The shape of waves is rolling peaks and valleys. If the wave moves faster, the peaks and valleys form closer together. If it moves slower, the waves spread out. <ul><li>The speed of a sound wave - how fast the waves move from peak to trough - is called frequency, but we also know it as pitch. We measure sound frequency in hertz (Hz), which is the cycles per second.</li><li>Understanding frequencies is useful. For example, you can tune an instrument - middle C on the piano is tuned to the frequency of 261.63 Hz.</li></ul>

Sound frequency

<ul><li>Amplitude (amps) describes the height of the sound waves and gets measured in decibels (dB).</li><li>Timbre is the perceived sound quality. You can distinguish the unique harmonics of timbre by the combination of notes in a chord.</li><li>Envelopes determine how a sound's amplitude changes over time. It can be quick and loud, like a door slamming, or it can slowly increase in volume, like a cello's note.</li></ul>

Other useful sound terms

Sound must travel through a medium like water, air or even sand. It means you will never hear an explosion in a vacuum. The speed of sound, or the sound's velocity, differs depending on how dense the medium is it's moving through. Generally, the speed of sound is 1,127 feet per second or 767.54 miles per hour.

The speed of sound

Musicians and content creators need knowledge of frequencies and amplitude in their home recording set-ups to ensure their voice sounds rich and clear. Understanding sound can help them choose microphones best suited and help to set up the room to reflect or dampen sounds.

Benefiting from understanding sound

Learn the basics of physics when it comes to sound waves. Learn about the types of sound waves, how they travel and more.

Stashed ideas

What are sound waves and how do they work? | Popular Science

Most people seem to be sleepy when the weather is dark and rainy. For the longest time I've had my own theory about it but I also decided to do some research. Here is the best explanation I could find for why rain and sleep go together.Bonus - see the last idea for my own, unproven theory.

The connection between rain and sleep

The absence sunlight triggers our bodies to stop producing the hormone melatonin, which makes us sleepy at night. When it’s raining and skies are overcast, we miss out on our body’s internal alarm clock. Naomi Rogers, a chronobiologist from Central Queensland University, told the Sydney Morning Herald, that when you don’t see the sunlight first thing in the morning, your body never gets the cue that it needs to shift into daytime mode.

Less sun, more melatonin

Earthy smell of rain can be soothing. Plants secrete oils during dry periods, possibly to stop seeds from developing when there aren’t enough resources for them to thrive. When it rains, the water brings out the accumulated oils and they mix with a chemical called geosemin, which is produced by soil bacteria, to create a “musky” smell.Bill Ypsilantis, a soil condition and health specialist at the Bureau of Land Management, told NPR that this is the same smell you feel when turning over the soil.

The smell of rain

Also there is the smell of ozone - a molecule made of three oxygen atoms, generated when lightning interacts with the air, breaking up and recombining oxygen molecules with two atoms into chains of three instead.It also creates a powerful association with rain.

Thunder & Ozone

Rain sounds are also comforting. The rhythmic pitter-pattern of rain hitting a roof, umbrella, or the ground below is called pink noise. Pink noise is a category of background noise that, like white noise, has all of the frequencies that humans can hear, ranging from 20 Hz to 20,000 Hz. Unlike white noise, which has the same volume at every frequency, pink noise has lower volumes at higher frequencies, which according to some research may improve our quality of sleep by decreasing our brain activity.

The sound of rain

So the combination of melatonin, smell and sound creates the conditions for being sleepy.My own theory has to do with preservation of energy. If it rains most animals have a harder time to foridge for food or you can even get sick if you prance around in the rain. If you can't eat you better not spend energy. And what better way to do it except by spending a rainy day in a borrow or our own beds? I think we just evolved to be lazy during rainy days. I still like my theory, although there is no proof for it.

What is the smell of rain

Seeing silence: what nature tells us if we listen

Why Do Japanese People Love Taking a Bath at Night Before Going to Bed? – Japan Info

What are sound waves and how do they work? | Popular Science

Why does rain seem to make you sleepy?

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