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Demonstrating an eclipse of the moon
Use a flash light or a lighted candle in a darkened room to show the sun. Hold an 8 cm rubber ball in one hand to show the earth. Hold a 2-cm ball in the other hand to show the moon. Hold the ball demonstrating the earth in the beam of light from the flash light and observe the shadow cast by the earth. Next pass the smaller ball or moon at the back the earth into the shadow. The moon will be in eclipse while it passes by the earth's shadow.
Why are peaty and marshy soils highly acidic? The acidity is due to decomposition of organic matter under anaerobic conditions and formation of sulphuric acid.
The Fujita Scale is used to classify intensities of: Tornadoes
Explain Extrasystole and Compensatory Pause During the relaxation period, cardiac muscle is in the relative refractory period i.e. sleeping but only just. If a sufficiently st
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what is acid
Explain Abnormalities due to Changes in Serum Electrolytes The intracellular and extracellular electrolyte concentration difference is responsible for the resting membrane pot
Biogas You may have heard of the use of cattle dung for production of biogas which is used for cooking. Water weeds like water hyacinth, water lettuce, salvinia, hydrilla, du
The Copernican Revolution: It was right in the midst of these developments in the fifteenth century, that there came the first major break from the whole system of ancient thou
Determine the Pathways of Weathering Weathering and soil development proceed almost simultaneously in case of soft rocks, whereas in case of hard rocks weathering precedes soil
role of psycholgy
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