Separating Components of Mixture
If some substances are mixed by mistake, then they need to be separated from each other, but sometimes it is very difficult to separate them. In such situations we use a variety of special methods, such as filtering, gleaning, sublimation, evaporation, precipitation to easily separate substances.
How digested food from food pipe and absorbed food from body reaches every cell? Carbon dioxide from all body parts and other waste elements related to waste materials (kidney, lungs)? All there works are done by a pump (heart) and artery coming out and reaching there.
Skeleton and Muscle System
We are movable. We are not static at one place. We move from one place to another. We can also move our hands, legs, head and so on. All these movements are possible by the mixture of two systems in human body - bones and muscles. All bones together make skeleton system and all muscles together make muscle system.
There are some changes that we cannot see easily with our eyes easily. Many species of organisms are born on earth. These changes take a long time than a human life to be seen. Therefore, humans cannot see the sequence of development of these changes. But scientists have collected many proofs and facts to prove these changes.
Materials Used in Construction
Construction of home, bridges, roads and dams use natural stone wood, metals and bricks, lime, cement, concrete, etc. Natural stones like granite, marble and sand stone are also used. These materials have been used in the construction of nagarjun sagar dam.
Interdependence of Organisms
Everything, organisms and plants are dependent on each other. They are connected together. Nature has made us in a way that humans, plants, animals and organisms are connected to each other. This makes a balance in nature. If one of them slips out or get separated then the chain gets destroyed.
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