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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.
What is a hormone? A hormone, as you may already know, can be described as a chemical substance which having been formed in one particular organ or a gland is carried in the bl
Enzymes of intestinal juice Aminopepetidase is an exopeptidase and cleaves peptide bonds next to N-terminal amino acids of polypeptides and oligopeptides (unlike carboxypept
Brain: The centre piece of the nervous system is the brain which IS possibly the most organised form of matter known. It is unlike any other organ of the body, as ~t alon
Explain Presence of Foodstuffs - Movements of Gall Bladder Presence of foodstuffs: Fatty foods particularly cream, fatty acids and proteins to a less extent, stimulate the cont
give the importants segnificant figure in measure quantities
SEA WATER HAS TO BE FILTERED TO REMOVE MOST SOLID IMPURITIES IN IT BEFORE IT UNDERGOES MEMBRANE DESALINATION .SUGGEST ONE REASON.
what are the organs of respiration in the lower form of animals?
The industry dealing with hazardous materials should draw emergency disaster plan. Safety committees consisting of workers and management are required to review from time to tim
why is oxygen is important to plants?
what happens if one animal is not there
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