science knowledge

Please don't sleep under tree at night .  It is quite harmful.      See, during night you are not able to breathe properly, right? Do you know why? This is because during the day, in the presence of sunlight, plants takes in carbon dioxide and release oxygen in the process of photosynthesis . That is why production of oxygen is more than the production of  carbon dioxide during daytime.  Hence, if we sleep under a tree during daytime, we may get a  good amount of oxygen, thus giving us a nice sleep. However, at night, plants do not perform photosynthesis due to the absence of sunlight.  But respiration still goes on.  Hence, as compared to oxygen, the proportion of carbon  dioxide around the trees is more. It is not good for humans health.  Thus, if we sleep under a tree at night, we may feel suffocated due to lack of oxygen. Moreover, inhalation of excess carbon dioxide is harmful to  human beings. Therefore, it is not go...

        E lectricity is the flow of electrons through conductors . It always takes the easiest route, i.e., electricity always flows through a path of least resistance .      electricity flows are made of copper . Copper offers least resistance and is a very good conductor of electricity. However, the bird's body offers greater resistance and is not a good conductor as copper. Hence, electricity ignores the bird and flows through the cables and birds don't get electrocuted.      B esides this, electricity flows from its highest potential to its lowest potential . Now, the power cables usually run at different potentials. If bird's feet are on the same power cable, then they are at same potential. Thus, the bird doesn't get electrocuted. However, when the bird touches two cables with different potentials at the same time, then electricity will flow through the bird to go to the other cable with lower potential and the bird will get elec...

     At first we must know about our solar    system. Our solar system has been situated in Milky way   which is our galaxy. There are a lot  of galaxies and they all contain numbers of   solar systems just like ours milky way. One interesting fact is that all galaxies does have their own gravitational force and that all are held together by that gravitational force.  Just like galaxies, all planets which are situated in that different galaxies also have gravitational force and that force is responsible for the movement of planet's in there particular orbits around the sun. Sun is the centre of our solar system just like centre of any atom and other planets are moving around the sun just like electrons but in our solar system single orbit contain only one planet.  That all planet's have there different gravitational force. Ther are 8 planets in our solar system which have gravity and Jupiter have more gravity than other remaining s...

    Almost all animals and birds can see in dark. But humans cann't  see in dark or in night clearly. Just because of that ability to see in dark, some animals and birds can servive easily in this word ( owls ). We all know they can see during day too, but ability to see in the dark make them special than humans.     Let's see how they can see in the dark .   The animals which can see in dark called as nocturnal animals . Nocturnal means ability to see in the dark. They can see in the dark just because of there eyes structure. Nocturnal animals eye contain specific rods cells that carry rhodopsin in the eyes that helps in the night vision . that rhodopsin are very sensitive to longer red wavelength.          Retina is the composition of rods and cones . Rods are not able to capture light as sharply as cones do. but That rods are very sensitive to low light level and hence responsible for the vision in night. Different animals...

 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 ...

            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...

     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 call...