science knowledge

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 of...

  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 process t...

     We all know we can use ice removal vehicle's To make clear roads. We pick that option when amount of ice is very large. But when amount of ice is very less then we can use two easy way.                                                                          1)  sodium chloride :                                                                                            we can spread that sodium chloride on ice. That sodium chloride will absorbe all moisture which is present on that ice then salt plus ice water solution will form called...

     Sound create just because of vibration of things. Sound need medium for its propagation. Sound can't propagate in vaccum. Sound can travel through all of three mediums solid, liquid, and gas.  Speed of sound varies with mediums.       1) Solid       2) liquid       3) gas      1)* In case of solids, speed of sound is very fast in glass. (  Nickel=6040 m/s, steal =5960 m/s, iron=5950 m/s)        2)* In case of liquid, speed of sound very fast in sea water.   ( sea water=1531m/s)      3)*  I  case of gas, speed of sound is very fast in hydrogen gas.   ( hydrogen gas=1284 m/s)        At normal temperatures speed of sound is= 340 m/s  In dry air speed of sound is =332 m/s. SOUND TRAVEL IN TWO WAYS   1)  Transverse wave =  it create when oscillations of wave are perpendicular to t...

  Light travell distance because our surroundings  weather  is the composition of atoms .that atoms are responsible  for travelling  of light.  The distance traveled by light is directly proportional to intensity of light.                          When you turn on the torch in your room ,it would be sufficient .because  your room has limited area. but when you turn on torch in open    Area ,you can see just limited area .you can't  cover larger area with torch, because it has limited energy.      LET'S SEE HOW ATOMS ARE RESPONSIBLE FOR THAT                When you turn on torch ,it emits  some radiation called  photons. Atoms absorb  that radiations and get excited. Means electrons which they contain,  goes low energy  level to high energy  level. This happens with lot of atoms at...

We all know, each and everything which is present in nature need oxygen to burn. Even SODIUM metal .sodium is not hard metal just like other metals .we can cut it by using just knife.                   We all knows SODIUM is burn able metal. Atomic number of SODIUM  is =11.             According  to electronic configurations there is only one electron in its outermost valence shell.         SODIUM METAL easily burn when it come in contact with water.                                                                                                                        ...