science knowledge

  When we see the sun in midday it looks yellow but at the sunset it looks red. do you know why.                  If you wants know that, you must know range of visible region .            Why sun looks yellow in midday ? Sun looks yellow in midday because, blue, violet colours have low wavelength but high frequencies , because of that, they scatter in all direction and sky looks blue . That means we just have to consider remained yellow, orange and red colours . This three colours  have low frequencies but high wavelengths, as compare to blue and violet colour . that is why they easily reach to earth surface.                           There are three colours eventhough sun looks yellow because if we compare just these three colours, then we can understand orange and red colours have high wavelengths and low frequencies. But yello...

    Air is the composition of different type of gasses. Let's see percentage of that gasses in the air. 1) Nitrogen   =             78.09% 2) Oxygen   =                20.95% 3) Argon   =                   0.93% 4) Carbon dioxide =  0.039% 5) Neon   =                     0.001818% 6) Helium   =                 0.000524% 7) Methane   =               0.000179% Oxygen  gas always present in air in molecular form. Everybody has seen at least one time, balloons always go upward direction in air.   Do you know this is why, because balloons  filled up  helium gas which is very light weight gas.         Methane  gas is responsible for gree...

 In twenty first century. We All know the importance of nature. Nature is the integral part of our life. without nature life is nothing, nature is the only one thing that is responsible for existane of human and all living organisms.                          We just know that but we are doing nothing to save that nature. Now We all know the importance of nature because that type of situations has been created in the whole world. Just Know the importance of nature is not big deal But execution is most important thing.                          Every mother and father teach to their babies, this is a tree, this is a mango etc. but they should know tress are not show piece. You should teach your babies in childhood, this is  a tree and we have to save them. Because if we take care of them now, they will take care of us in future. We ...

1) Human brain surface contain 100 billions neuromuscular cell's. 2) left side of human brain    contain 1860 lakh more neuromuscular cell's than right side. 3) human brain can stay alive without oxygen up to 4-5 minutes. After that brain cells will die . 4)  average weight of human  brain is up to  1400- 1500 gm. but weight of Albert einstein's       brain was just 1230 gm. 5)  per minute 750 - 1000 ml blood get flow from  our brain. 6)   different type of caves which present in our    brain called ventricles . (Hollow part) 7)   right side of  human brain control left side of body   and left side of brain control right side of body. 8)   left side of human brain control our conversations skills, writing and imaginations. 9)  right side of our human brain control our art abalitys .   Classification of human brain . 1) cerebrum:    ...

Humans are not only one who grow their babies by feeding milk.   There are also lot of animals who grow there baby's by feeding milk. Some of them are water type, air type and ground type animals. 1) AIR TYPE :     BAT          Image of Bat   Bat is the only one bird who grow their babies by feeding their milk. No other birds can do that.  There are 977 type of different species of bat's available all over the world.                                                   2) water type :                                                                  Image of whale                 Image ...

  What are antibiotics ?          Antibiotics are medicines that help us to stop infection caused by bacteria .they do that by killing them or stop their reproduction.           Sir Alexander Fleming was the first person who invented first antibiotic. That antibiotic was given name penicillin .                   Born :  6 August 1881, lochfield , Scotland    Died :  11 March 1955, London , United kingdom   Nobel prize :  They got nobel price in physiology or medicine in 1945 , for the invention of penicillin that work against bacteria.  Period of 1940 -1960 is known as golden age for antibiotics.  Up to the 1997 scientist made thousands antibiotics.     Type of antibiotics: 1) Broad spectrum antibiotics:                   ...

            fishes stay alive in water as we human can stay alive on earth surface.we humans are alive because we breath oxygen . Without oxygen we can't stay alive on earth surface. Water living organisms like fishes also breath oxygen  in water. respiratory organs of humans and fishes are totally different. Because we live on the earth and they in water.  Human Respiration.     Humans perform respiration through their lungs . Humans takes oxygen insides of their body and release carbon dioxide. In humans body,  inhaling of oxygen and exhaling of  carbon dioxide that both process carry out by  same organs. But in case of fishes it's totally different. Fishes respiration.          fishes perform respiration through their gills . You can see in first image, fishes takes oxygen reach water inside of their body and absorbe all oxygen which present in the water.during that pro...