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Softening water with chemicals Try making suds with a half test tube of hard water and a few drops of soap solution. Next boil a same sample and again try to make suds by usin
Question 1 Discuss the efforts introduced to manage of air and water pollution Question 2 Comment briefly on agricultural practices in Arid zone Question 3 Anal
A field trip to study erosion Find some place in the locality where running water has complete damage by cutting gulleys. Take the class to study the erosion. Why was it caused
A stone seems to weigh less in water Weigh a large stone on a pair of kitchen scales. Put a loop of heavy string around the stone and weigh it again suspended in a pail of wate
A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t
Life of a Star: A young star is thought to be composed largely of hydrogen gas. Hence, the most likely place for a star to be born is in one of the numerous clouds of hydrog
Explain the Osmosis Osmosis, quite simply, is the physical process, wherein there is transfer of a liquid solvent (water) through a semi-permeable membrane that does not allow
describe briefly the scientific and technical achivement of the bronze age
I really need help on cells
Define the uses of buffer method The buffer method of Shoemaker and coworkers for determining lime requirement is being widely used in India. In this method 5g of soil is added
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