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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.
A weather house Changes in the amount of water vapour are in the atmosphere can be indicated by variation in tension in a few strands of human hair or by using the hygroscopic
Explain the Normal Constituents of Urine The normal constituents of urine are of two types. These are the organic substances and the inorganic substances as listed Organic
Explain the Complex Cells - Primary Visual Cortex They are sensitive to both orientation and movement. For example, a line or edge with a particular tilt might stimulate a comp
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
Eicosanoids : Local hormone formed by body tissues during self-healing responses to stimuli.
Determine the role of Time in soil formation Time plays a very important role in the soil formation as it provides for the soil forming processes to act and cause significant c
RADIATION HAZARDS : We are sure that you would have studied about electromagnetic radiation during your studies at the school. You would recall that in electromagnetic radiatio
Explain the Mechanics of Respiration The process of respiration can be well understood by studying the mechanism of respiration. This can be explained through a respiratory cy
what is the first layer of the earth
Riboflavin (vitamin B2) Riboflavin was isolated in a crystalline form from milk by Kuhn and co-workers in 1933. Because of this, the early name of the vitamin was la
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