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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.
what is soil erosion?
INTRODUCTION : Gas, Electricity and water are integral parts of any science laboratory. You would have realised from personal experience (if any) and in the course of your study o
Why Rainfall is imprtant factor in active soil formation Of the various climatic elements that take part in active soil formation, rainfall or precipitation is the most importa
Define Primary Transport Primary transport employes energy directly, light or chemical energy is transformed to electrochemical energy as electrochemical potential of the subst
To perform the specific biological func. for the normal maintenance of optium growthand health.
What do all optical instruments and devices have in common?
classification of various qualitative & quantitative health management technologies
Define Ribosomes Ribosomes are small, but complex structures, approximately 20 to 30 nm in diameter, containing two unequally sized subunits, referred to as large and small sub
Explain the Mucous Membrane This layer is lined by the epithelial cells. Parts of the tract which are subject to mechanical injury, the layer consists of stratified squamous ep
Special/Unique organelles and how they assist sarcodine
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