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Blowing soap bubbles
Soap films and bubbles serve very well for observations on surface tension. You can make a good soap bubble solution by placing three level tablespoonfuls of soap powder or soap flakes into four cups of hot water. Let the solution stand for three days previous to using. Try blowing bubbles with a bubble blower, a soda straw, a clay pipe and an old tin horn about 4 cm in diameter.
An experiment with a loop of thread Rinse a dinner plate methodically and then fill it with water. Make a loop with thread, open it a little and float it on the water. Touch th
Darwin and Natural Selection: The English naturalist Charles Darwin (1809-1882) explained how biological evolution took place, in his remarkable "The Origin of Species" in
Use of Fire Extinguishers : We know that one type of fire extinguisher cannot serve the purpose on all kinds of fire. In this subsection you will study about the use of different
Assembling First Aid Box : Your Counsellor will show you the contents of the first aid box available at the Study Centre. You observe the contents. As part of this activity, yo
can u explain me about ovaries and testes
Aggression as a Learned Response: To elaborate this further, let us assume that you are preparing for an exam or reading something that requires concentration. Your neighbou
Define the Fixed Type of Macrophages The fixed types are located permanently in certain organs, which include: Lungs - alveolar macrophages. Liver - kupffer cells.
The methods of food processing by covering the two major methods- thermal processing dehydration. Food processing methods which include freezing, microwave proces
Frost in the classroom Frost can be made in the classroom by using a tall metal container like as a tin can. Pack the can with exchange layers of ice and salt, using about doub
Explain Change of posture - Decreased Cardiac Output When a person stands up from lying down posture, there is an immediate but transient fall in systolic blood pressure. This
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