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To show the differences in soil particles
Secure some glass jars that hold about half Gallon or two litres of water. Place various handfuls of soil in a jar. Fill the jar with water and then methodically shake up the soil in the water. Let the jar stand for various hours. The heaviest particles will settle out first and the lightest ones last. The layers in the jar after settling will be in the order of the weight of the soil particles. Siphon the water from the jar with a tube. Next study a small sample from each of the layers with a magnifying glass.
TO SHOW THAT AIR HAS WEIGHT Drive a thin nail by the exact centre of a long rod such as a metre stick or a yard stick. Balance the stick by resting the nail on the rims of two
Describe the factors which decide the broad area of scientific activity?
life span of a roundworm
Explain Immunoglobulin A - Classification of Antibodies Present in secretions, protects mucosal surfaces. It is found in tears, saliva, and gastrointestinal secretion, respirat
discussion about mucic acid test
INTRODUCTION : In the first unit of this block you read about hazards due to electricity and gases in the science laboratories. 'The second unit deals with yet another type of com
An experiment with a floating candle Put a nail in the lower end of a candle. The nail should be just the right weight to make the candle float with its top a little above the
How to make a devil diver (Cartesian diver) Find a tall glass jar with a quite wide mouth. Wrap a few turns of copper wire about the thin part of the rubber bulb from a medicin
Nonionising Radiations : As stated earlier the radiation hazards are not limited to ionising radiations from radioactive materials. There are a number of other radiation sources i
Ask question mode of nutrion in tigers
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