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Observing sun spots
Use the telescope that you made in a last experiment. Set it up so that it points directly at the sun and focus it so that a clear and bright image of the sun is formed on a piece of white cardboard placed a short distance from the eyepiece lens. If sun spots are there on the surface of the sun you may be able to observe them as small dark spaces of irregular outline on the image. Caution. Do not look at the sun by the telescope, unless your eyes are protected by a dark glass filter.
AIDS: You have learnt about infectious diseases. For centuries, death from infectious diseases was common and whole populations were often affected. One of the remarkable achi
Explain the Parathyroid Glands The parathyroid and thyroid glands are neighbours in the neck. You would realize that parathyroid glands are the small glands that lie behind the
WHAT IS RESPIRATION ?
Describe about the Moles Molehills, frequently observed in some fields are composed of subsoil deposited by moles. They need a good reserve of calcium in soil.
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Slight Bleeding : Frequently, the bleeding stops of its own accord or is easily controlled by local pressure. The procedure for first aid treatment is as follows: (1) Reassure
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how effective is the LION KING movie in meeting the standards that relate to how energy flows through an ecosystem and how earth is inter connected?
What is the structure of the urinary bladder? The bladder is composed of four layers of tissues. The outermost serous membrane is a thin membrane lining the closed cavities of
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