Do this experiment in groups of four friends. Each group will need a big pot filled with water and the things listed in the table. Put each thing one-by-one in water and observe. Mark [√] for the things that float. Mark [×] for those that sink. Things to be put in water I guessed, before I did it I saw, when I did it (a) Empty bowl (katori) (b) After putting in 6-7 small pebbles, one-by-one Iron nail or pin Matchstick (a) Empty plastic bottle with its lid closed (b) Bottle half-filled with water (c) Bottle full of water Aluminium foil (from medicine packing) (a) Open and spread out (b) Pressed tightly into a ball (c) In a cup-like shape (a) Soap cake (b) Soap cake on a small plastic plate A piece of ice Find out from the other groups which things floated and which sank in the water?After doing the experiment, fill in the blanks. The iron nail ________ in water but the katori ________. I think this happened because _______________________________________________________________________________. The empty plastic bottle _________ on water. The bottle filled with water _________ because ____________________________________________________________________________. The aluminium foil _________ when it was spread out. When pressed tightly into a ball it _________. This may have happened because_________________________________________________________________.