Knowledge N Fact4u

Because it is easier to spell dry than green. NO ,No,no😂😂 •It is because of ignition temperature. Ignition temperature is the lowest temperature at which a combustible substance starts burning. Now, green leaves have moisture or water in them. Wow.   •Water has a property of absorbing a huge amount of heat before evaporating.     •Hence, when we try to burn green leaves, a large amount of heat is required to first evaporate the water and then to reach the ignition temperature of leaves, thus not allowing the leaves to catch fire easily.   •However, dry leaves don't have water in them. Hence, they don't need much heat, making them burn easily.

•People say, "Human beings use only 10% of their brain on a daily basis." But, the truth is that we use all of our brain, all of the time.  •The majority of the brain is almost always active.  •One common brain imaging technique, called functional magnetic resonance imaging (fMRI) can measure activity in the brain.  •Using this method, researchers show that most of our brain is in use most of the time.  •A lot of the brain is even active, when a person is resting or sleeping.

Teens or young adults start smoking primarily because it feels glamorous and exciting. Watching friends as well as movie actors influences them as well. Cigarettes contain tobacco which contain a highly addictive chemical called nicotine which realsese some hormone. When taken in, nicotine enters the bloodstream and quickly travels to the brain, releasing feel-good chemicals and removing unpleasant feelings. This helps adult smokers to cope with stress and stay focused. Shortly after completing the cigarette, a smoker starts feeling irritated and anxious. He starts feeling a mild nicotine withdrawal. On smoking the next cigarette, nicotine reaches the brain in less than 10 seconds, instantly giving a pleasant feeling and sense of calmness. This makes it very difficult to stop as the person starts becoming emotionally and mentally dependent on nicotine. This leads to many people becoming chain smokers, needing multiple cigarettes a day.

The rings of Saturn can be remnants of a moon, comet, etc., that got ripped apart due to Saturn’s gravitational pull, or result of a large collision between two moons. Some even claim that rings are made up of debris left over during the formation of our solar system. So, how did this debris form Saturn’s rings? It’s got to do with Roche limit. It is the distance at which objects tend to be ripped apart by the planet’s gravitational pull. In case of Saturn, it is popularly believed that a celestial body like moon or comet got too close to it and exceeded the Roche limit. Hence, it got ripped apart into pieces, thus forming its rings. Now, earth also has a moon. But since it is beyond the Roche limit, it doesn’t get ripped apart into pieces to form rings .

As per Roman Mythology, Jupiter is the god of thunder, lightning and storms. It is the largest planet in our solar system and its mass is about 2.5 times the total combined weight of all the other planets in our solar system. Now, if Jupiter would have never existed, it is safe to say that even we would not have existed. This is because some scientists believe that during the initial stages of the formation of our solar system, Jupiter's inward migration towards the sun and then subsequent outward migration away from the sun and towards Saturn played a vital role in the formation of mercury, Venus and earth. Also, since ages Jupiter has been protecting earth from collisions with large asteroids and comets. Lastly, more than 70 moons of Jupiter would have wandered along the solar system as orphans.

CHARGED  PARTICLE  ARRANGED IN REGION AROUND THE EARTH The Van Allen Belt is a region about 700 to 60,000 km above the surface of earth which is populated by energetic charged particles.The shape of the region is like a torus or a doughnut and the charged particle which exist in the region are those which have been trapped by the earth magnetic field. This is closely related to the phenomenon of the auroras in the polar region-bright lights seen because charged particle from outer space hit the outer atmosphere and radiate light in the process. this belt was discovered by J.Van Allen in 1958 using the explorer stat-elite . There are two distinct torus shaped belts-the inner and the outer one-with density which are a maximum at the equatorial latitudes and which drop off to zero beyond latitudes of approximately 60 in each hemisphere. The outer belt,roughly in the region of 20,000 to 60,000 KM above the surface of the eart...

Most of the energy responsible for the geographical history of earth can be traced to the decay of the uranium,thorium and potassium isotope it contain. The earth is believed to have came into being perhaps 4.5 billion years ago as a cold aggregate  of the smaller bodies that consisted largely of metallic iron and silicate material that had been circling the sun. Heat of the radioactive origin accumulated in the interior of the infant earth and the time lead to partial melting.The influence of gravity then caused the iron to migrate inward to form the molten core of today's planet;the geomagnetic field comes from electric currents in the core. The lighter silicates rose to form the rocky mantle around the core that makes up about 80 percent of the earth's volume. Most  of the earth radioactivity is now concentrated in upper mantle and the crust, where heat it produces escapes and cannot collect to remelt the eart...

It is a natural way of our body to take a bath. Really?😕    The answer is a big NO.😉 Sweating helps in thermoregulation. Thermoregulation is the process by which organisms maintain their internal body temperature . Now, the internal body temperature of a human is about 37 degrees Celsius or 98.6 degrees Fahrenheit. Our enzymes and hormones work best at this temperature. Hence, thermoregulation is very important for us. On a sunny day or during exercise, when our body temperature increases, our sweat glands produce sweat. This sweat is about 99% water. Water is a very good heat absorbent.It absorbs much of our body heat and evaporates into the atmosphere, helping us lose heat and thus maintaining our body temperature