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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.
Determine the hierarchical order of soil taxanomy Order: At this highest level of generalisation, the soils are distinguished on the basis of the degree of horizon developme
Enumerate in brief about the Earthworms There are several species of earthworms, having slender cylindrical bodies with varying diameters. These organisms ingest the dead organ
what is meant by this topic?
in a reaction 5.3g of sodium carbonate reacted with 6g of ethanic acid. theproducts were 2.2 g of carbon dioxide , 0.9g water and 8.2 g of sodium ethanoate, show that these observa
describe history of science
Fractures : It is not our intention to introduce you to many types of fractures that can occur or all the ways a first aider might deal with them. The essential thing is that you
Decribe the factors which decide the broad area of scientific activity
What happens if the elasticity of Price expectations is less than one?
OBLIGATIONS OF THE TEACHERS AND THE HEAD OF THE INSTITUTION TOWARDS MAINTAINING LABORATORY SAFETY Safety in laboratory work is the collective responsibility of the Head of the
Coenzyme : A molecule that binds to an enzyme and is essential for its activity, but is not permanently altered by the reaction. Many coenzymes are derived from vitami
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