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Life process-Nutrition {biology}

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When we do any work, we require energy to do.Energy is needed to maintain a state of order in our body . We also need materials from outside in order to grow, develop,synthesis protein and other substances needed in the body. These requirements are fulfilled by food that we eat. How do living things get their food? The general requirement for energy and materials is common in all living beings but is fulfilled in different ways.Some organisms use simple food materials obtained from inorganic sources in the form of carbon dioxide and water. These organisms are known as autotrophs include green plants and some bacteria. Other organisms utilise complex substances. these complex substances have to be broken down into simpler substances. These organisms are known as heterotrophs  included animals and fungi. Nutrition in human beings -The alimentary canal is basically a long tube extending from the mouth to the anus.In our body various  regions are specified to perform different fun...

corrosion and rancidity{chemistry}

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CORROSION;YOU HAVE OBSERVED THAT IRON PARTICLES ARE SHINY WHEN NEW, BUT GET COATED WITH A REDDISH BROWN POWDER WHEN LEFT FOR SOME TIME. THIS PROCESS IS COMMONLY KNOWN AS RUSTING OF IRON. SOME OTHER METALS ALSO GET TARNISHED IN THIS MANNER.HAVE YOU EVER NOTICED THE  COLOUR OF THE COATING FORMED ON COPPER AND SILVER?  WHEN A METAL IS ATTACKED BY SUBSTANCES AROUND IT SUCH AS MOISTURE , ACIDS , ETC. IT IS SAID TO CORRODE AND THIS PROCESS IS CALLED  CORROSION.THE BLACK COATING ON SILVER AND THE GREEN COATING ON COPPER ARE OTHER EXAMPLES OF CORROSION. CORROSION CAUSES DAMAGE TO ALL OBJECTS MADE OF METAL, SPECIALLY THOSE OF IRON. CORROSION OF IRON IS A SERIOUS PROBLEM. EVERY YEAR AN ENORMOUS AMOUNT OF MONEY IS SPENT TO REPLACE DAMAGED IRON.  RANCIDITY;HAVE YOU EVER TASTED OR SMELT THE FAT/OIL CONTAINING FOOD MATERIALS LEFT FOR A LONG TIME ? WHEN FATS AND OILS ARE OXIDISED, THEY BECOME RANCID AND THEIR SMELL AND TASTE CHANGE. USUALLY SUBSTANCES WHICH PREVENT OXIDATION {ANTIO...

types of chemical reaction {chemistry}

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In our daily life,Varios chemical reactions take place around us . Also in our body chemical reaction takes place. chemical reaction also takes place in plants,This process is known as photosynthesis. there are five types of chemical reaction. 1.combination reaction  2.decomposition reaction  3.single displacement reaction  4.double displacement reaction 5.oxidation or redox reaction .