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Making a 'burp' bottle
Fit a bottle or flask with a single-hole stopper which carries a funnel. Put the stopper firmly in the bottle and then pour water into the funnel. The bottle will-'burp' at usual intervals.
describe the factors which decide the broad area of scientific activity
Why do organisms need water? Organisms need water for the following reasons: (i) All cellular processes need water as a medium. Usually, the reactions that take place in our
what is cutaneous respiration
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A simple balance Suspend a ruler by loops of cord a short distance above a table top, as shown in the diagram. When the ruler is in balance, place identical coins in dissimilar
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Functional unit of the nervous system-neuron: The human brain is composed of more than one hundred billion (100,000,000,000 or 1011) cells called 'neurons'. This number which
write an essay about electrical energy conservation
what are the four characteristics of respiratory surface
Emergence of Science: We gave you a glimpse of the social structure in India during the Iron Age. With the emergence of ordered urban societies, the stage was set for a tre
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