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Collect water from two different water bodies around you and study them for ph, clarity and presence of any living organism |
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Answer» he center of the POND in a small boat.SLOWLY immerse the Secchi’s disc into water vertically holding the rope tightly till the black and WHITE segments of the disc disappear.On reaching a particular depth, the disc becomes completely invisible.Using a pin, mark the LENGTH of the rope when the disc disappears (say A cm).Slowly PULL up the disc till the black and white segments of the disc just reappear. |
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