2006-12-05 12:17:29 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
Yup.. Special rocks called PUMICE alone floats.. these rocks are the by-product of volcanic activity.. when lava hardens it encloses the air and hence air gets clogged inside the rock.. the net density of the rock is less than that of the water which makes it float..
2006-12-06 01:21:41 · answer #1 · answered by Hellbound Angel 2 · 1⤊ 0⤋
Fletcherm is right. Small rocks don't float. You don't see any grains of sand floating, do you? A grain of sand is nothing more than a small rock or small piece of shell. Neither float. Pumice will float because it is filled with air pockets, making the density of the rock less than water.
2006-12-05 13:40:19 · answer #2 · answered by wires 7 · 0⤊ 0⤋
Actually, af flowating rock is not impossible. First it depends on the density of the rock. Much like a hot air balloon, if the density is less than that of the liquid it is in will allow it to float. It also depends on the liquid the rock is in. If it has a surface tension with a greater force than that of the downward force of gravity on the rock, then it will 'float.'
2006-12-05 15:48:37 · answer #3 · answered by arj7002 2 · 1⤊ 0⤋
ANY SUBSTANCE WHOSE DENSITY IS LESSER THAN THAT OF WATER OR ANY OTHER LIQUID FOR THAT MATTER CCAN FLOAT ON IT. MOST OF THE ROCKSS ARE DENSER THAN WATER. HOWEVER A VOLCANIC ROCK NAMED PUMICE CAN FLOAT ON WATER BECAUSE IT HAS A LOT OF AIR TRAPPE INSIDE ITS VESCICLES. IF YOU POWDER IT AND THEN PUT IN WATER THAT ALSO WILL SINK.
2006-12-06 02:32:21 · answer #4 · answered by MANU 1 · 0⤊ 1⤋
No.
Unless it's pumice.
2006-12-05 13:01:35 · answer #5 · answered by fletchermse 2 · 0⤊ 1⤋