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Explain what Diffusion is? Diffusion, we learnt is a simple process of movement of individual molecules from one region to another. Figure illustrates passive transport where m
What is Pedology Pedology is concerned with the study of the composition, distribution and formation of soils as it occurs in nature. On the other hand edaphology is the study
The effect of soap on surface tension Select a large plate and rinse it unless you are sure that it is very clean. Fill the plate with cold water and let it stand for a time on
Aprons : Additional protection, such as a rubber apron is recommended for work with appreciable amounts of chromic acid, hydrofluoric acid and other highly corrosive liquids.
Explain Saliva - External Defence Mechanism Saliva contains microorganisms which are not the normal inhabitants. Dead microbes are passively flushed by the saliva and are swall
Explain about the Biosphere Besides the above two types of factors, biosphere (the living environment) is another important active soil forming agent. The activity of living
Emergence of chemistery: Chemistry The level of chemical knowledge and practices in the new ordered society is reflected in the pottery, iron tools and glass objects found at
The Water Cycle Heat some water unless it is near the boiling point. Place it in a drinking glass and rotate the glass so as to moisten the sides right to the top. Place some v
Question 1 What are the sources of water pollution? List some measures that can help overcome the problem of water pollution Question 2 Environmental accidents can b
Stellar Parallax If the Earth were stationary, a given line joining point A on the Earth, a nearby star C and any given distant star would never vary. However, if the Earth
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