This is a crude thermometer. A stiff plastic bottle has a straw which dips in color water. Gently place warm palms on the bottle. DO NOT PRESS. Air will expand and water will climb up the straw. Now place the bottle in warm water to very graphically see the expansion of air.
http://www.arvindguptatoys.com/toys/Expansionofwarmair.html This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabli
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