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Cement and concrete
Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it hardens. Study its appearance and its properties. Break a piece of cement and study it. Mix the dry cement with about twice as much sand or gravel. This will form concrete. After adding water and mixing thoroughly place it in moulds. Permit these to arden various days. Again study the appearance and the characteristics of these samples.
Explain the Mixing Movement of the Gastrointestinal Tract This movement helps the intestinal contents to be thoroughly mixed at all times. It is usually caused by the local con
Explain Cough reflex Actions - Respiratory Process Cough reflex causes cough due to irritation of some receptors in tracheo-bronchial tree. It is a protective reflex. The irrit
Explain what is Argininosuccinate Synthetase In a 2-step reaction catalyzed by the cytosolic enzyme argininosuccinate synthetase, citrulline and aspartate are condensed to form
What is the important role of Vitamin K Vitamin K , as you may already know, is a fat-soluble vitamin that plays an important role in blood clotting. It was first observe
Ecosystem: As far as we know, our earth is the only planet where life exists, though scientists su constantly searching for signs of life on other heavenly bodies. You have al
what is the mode of feeding of a lion
Question 1 Define Eco-labelling. Explain the environmental importance of eco-labelling with examples Question 2 Discuss the elements of environmental roadmap for eco
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
Symptoms of AIDS The HIV infection cannot be detected in early stages because the infected person does not show any sign of illness right away and appears a healthy normal indi
what are the problems
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