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Making a simple reflecting telescope A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitabl
AIDS: You have learnt about infectious diseases. For centuries, death from infectious diseases was common and whole populations were often affected. One of the remarkable achi
Introduction : In any laboratory dealing with biological experiments, hazards can occur mainly due to chemicals and biological materials. In the previous exercise you have done th
Emergence of Science: We gave you a glimpse of the social structure in India during the Iron Age. With the emergence of ordered urban societies, the stage was set for a tre
Method of science: We have seen above that science is an enaeavour to understand nature and to mould it to satisfy human needs. In earlier units we have seen that, in this pr
Define Red Cells – Component of Blood These are employed in the treatment of all kinds of anaemia which can't be medically corrected, like when rheumatoid arthritis or cancer i
In hydraulic machines a liquid that has filled a pipe is pushed at one end of the pipe. The liquid then pushes a machine part located at other end of the pipe. Why isn''t gas used
Describe the formation of igneous and metamorphic rocks? Ans) Igneous rocks are formed by volcanic action and due to of volcanic activity. Metamorphic rock is formed by a co
Requirements Glassware like flask, petri plates, test tubes, pipettes isi infect ant Cleaning brush Liquid soap solution Bucket Enamel tray/steel tray Aluminium
Enzyme inactivation The disappearance of activity of an enzyme (in vivo or in vitro due to presence of inhibitor molecules or inhibitory condition(changes in pH, temperature,
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