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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.
Drinking straw hydrometer Procure a drinking straw or a stout natural straw about 20 cm long. If it is not 'water-proof' dip it in melted candle wax and permit it to dry. Seal
what are characteristics of resistance
What is the mode of nutrition in tiger?
Minerals Minerals like coal, iron, copper, steel etc. are used in all kinds of industries and in every-day life. The rate of consumption of minerals is increasing every year.
In what layer of the Earths atmosphere does most of our weather occur? Troposphere
Explain the Sensory and the Motor Neurons The peripheral nervous system consists of 1. Sensory neurons running from stimulus receptors that inform the central nervous syste
Explain the Dichromates or Mild Colour Blindness A dichromate individual possesses only two cone pigments. Lack of the red pigment, called protanopia, makes distinguishing of t
To show how water rises in different types of soil Place about 15 cm of dissimilar types of soil in a series of lamp chimneys after tying a piece of cloth over the end of every
Explain the Adrenocorticotropic Hormone (ACTH) ACTH, also known as corticotrophin, is a polypeptide and is synthesized by corticotroph cells of the anterior pituitary gland. It
Normally,on flat surfaces,heavier objects don''t travel as far as lighter objects when pushed with the same force.how would I explain why its different?
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