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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.
I Want to study Zoology but I''m not sure which branch to study and how this all works. I want to study mammals, but how do I get there exactly? Also I was thinking about Vertebrat
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Explain the Organs of the Urinary System The figure illustrates the organs of the urinary system. As is evident, the organs of the urinary system consist of 2 kidneys, 2 uret
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in honey if fieshe''s test is negative then is it required to perform the hmf test. kindly let me know the relation between te two
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