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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.
Dissecting simple flowers Label each of five cards or pieces of White paper with one of the following words: stamens, pistil, petals,sepals, receptacle . Dissect a flower ca
what is monera
Explain the Serum Creatinine Test Creatinine is a breakdown product of creatine, an important component of muscle. A serum creatinine test measures the amount of creatinine in
Non-Specific Defence Mechanism The non-specific defence mechanism is implemented for different types of infections. It resists infection in two ways, firstly, by blocking the e
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What are the ratios allowed for three year olds and Child Care Centers in Colorado and what is the citation of the rules that addresses ratios?
Human Evolution: Charles Darwin in the 'Origin of Species' gave a lilechanism for the evolution of plants and animals in general, even though he had speculated about the o
Define the Factors That Are Affecting Colour Perception The two most important factors which influence colour perception include: Temperature, and Humidity How do these factors
Define Caecum - Part of Large Intestine This is the first part of the colon. Ileocolic valve opens from the ileum on the medial aspect of the caecum. The vermiform appendix is
Hard and soft water in cleaning Prepare two samples of dirty cloth. Wash one in soft water with soap unless it is clean. Wash the other cloth in hard water for the similar leng
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