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How to make a filter
A plant pot with a plug of cotton wool in the bottom and a layer of sand a few inches deep makes a satisfactory filter for many purposes.
Make some muddy water by stirring earth in a dish of water. Pour the water into the filter and catch it in a clear glass as it drips out. See if you can better the filter by building it up with alternate layers of sand and powdered charcoal. like a filter will work very well for clarifying water before it is boiled for drinking purposes.
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What''s electricity and what dangers, can heat cause?
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Leguminous crop grown under phosphate deficiency conditions may suffer from N deficiency as well. Explain. Rhizobium bacteria infect the roots of leguminous plants and lead to
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what is the weigt on earth of an object that has a mass of 22 kg?
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What is the earth made of? The overall composition of the Earth, in terms of elemental composition is as follows: Iron 34.6% Oxygen 29.5% Magnesium 12.7% Silic
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