Sand Sucks | Telugu | Little known fact about Water
Channel: Arvind Gupta
Date: 2014-10-20

For performing this very unique experiment you will just need a plastic bottle, some sand and water. Cut a Tetra Pak to make an improvised funnel. Place this funnel on the mouth of a plastic bottle and fill it three-quarters with dry and coarse sand. Keep adding little bits of water to the bottle. The sand will absorb water and soon it will be saturated with it. Let a little bit of extra water float on top of the saturated sand. If you tilt the bottle you will see the extra water clearly. 
Now when you press the bottle something amazing happens. The extra water disappears!! You would expect more water to come out but the opposite happens. The water disappears. What happens is that on pressing the bottle the structure of the sand breaks and this creates internal cavities which suck the extra water! 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 enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org