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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 chemical reation
Zoology: The domestication of animals like horses and elephants and their use in warfare necessitated the study of their anatomy and physiology. A survey of Vedic literature h
A famous downslope wind that occurs in North America on the East side of the Rocky Mountains is called a: chinook
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
what is biological sickness of soil and give mangement measures?
Give the common name of the historic mineral that was the original source of radium and the first substance in which helium was discovered on earth: Pitchblende
Requirements Glassware like flask, petri plates, test tubes, pipettes isi infect ant Cleaning brush Liquid soap solution Bucket Enamel tray/steel tray Aluminium
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How Complement System Helps To Handle Microbial Invasion 1) Some components of a complement system coat microorganisms. These organisms with such a coat can be easily phagocyt
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