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How to make a simple vacuum pump
Secure a bicycle or automobile hand pump. Open the pump and delete the piston. Un- screws the bolt that holds the leather washers. Reverse the washers by turning them over. Change the washers on the piston and insert in the pump cylinder. A pump of this sort will serve to do a lot of simple vacuum experiments
A cloud in a bottle You can make a cloud form in a bottle. Get a large glass bottle and fit with a rubber stopper carrying a 10-cm length of glass tubing. Place about 2.5 cm of
fertilization of an earthworm
To show how soil is formed from rocks Carefully heat a piece of glass in a flame and then plunge it into cold water. The unexpected cooling of the glass causes it to contract u
Explain the Hyposecretion during Adult Life Hyposecretion during adult life: It is only currently becoming recognized, the usual feature being low blood glucose level (hypoglyc
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Human Evolution: Charles Darwin in the 'Origin of Species' gave a lilechanism for the evolution of plants and animals in general, even though he had speculated about the o
Origins of Science: We have seen that the primitive human beings acquired different kinds of knowledge from the use of implements and tools, from cooking on fire. from huntin
Explain the Pyramids - Feature of Medulla Pyramids are the bulges of ventral surfaces, where most of the lateral corticospinal tracts originating from motor area of cerebrum de
Explain Active Transport - Mechanism of Urine Formation Active transport: When the substances are transported through a cell membrane against a concentration gradient, that is,
Factors decide the broad area of scientific activity
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