There are two dimensions of this experiment. One is when Ice floats in water and another is as mentioned in the question. When Ice floats in water, the level of water will remain unchanged when the ice melts away because in this situation, Ice replaced water which is ""equal to its weight"". But when the floating ice is taken down in the bottom of the bucket and tied over there with a string, and let melt away, the level of water will come down because now the ice was replacing the water ""equal to its volume "" and Ice has a lower density of water.

Recently, India became the first pioneer investor to have been allotted a site of 1,50,000 sq km in the Central Indian Ocean Basin (CIOB) by International Sea Bed Authority (ISBA) of United Nations for harnessing the Polymetallic Modules (PMN) lying on the seabed. The Polymetallic Modules (PMN) predominantly contain Manganese. They are made up of several metals and non metals. Chemical analyses of the nodules show that they contain manganese (29.40 %), iron (6 %), aluminium (2.9 %) nickel (1.34 %), copper (1.25 %), cobalt (0.25 %), titanium (0.6 %) as the majors components and some minor constituents like sodium, magnesium, silicium, zinc, oxygen and hydrogen (32.16 %).

Acetylene cannot be safely pressurized as a pure compound. Acetone is used for safe storage and transportation of Acetylene. Vessels containing a porous material are first filled with acetone followed by acetylene, which dissolves into the acetone. One liter of acetone can dissolve around 250 liters of acetylene.

Pure diamond should transmit visible light and appear as a clear colorless crystal. Colors in diamond originate from lattice defects and impurities. The diamond crystal lattice is exceptionally strong and only atoms of nitrogen, boron and hydrogen can be introduced into diamond during the  growth at significant concentrations (up to atomic percents). Nitrogen gives yellowish color while the Boron gives bluish color.

A plantation is a large farm or estate, usually in a tropical or subtropical country, where crops that are not consumed for food are grown for sale in distant markets, rather than for local consumption . Such crops include cotton, coffee, tobacco, sugar cane, sisal, and various oil seeds and  rubber trees. Farms that produce alfalfa, Lespedeza, clover, and other forage crops are usually not called plantations. The term `plantation`  has usually not included large orchards, but has included the planting of trees for lumber. A plantation is always a monoculture over a large area and  does not include extensive naturally occurring stands of plants that have economic value.