Answers

2015-08-13T15:52:27+05:30
When Water freezes at 0*C and tries to become solid ice, it entraps gas molecules inside the solid ice during the process....therefore gas being less dense than water lets ice float on it...the same reason applies for the magnification in size an volume of a specific amount of water.

hope that helps you! 
1 5 1
2015-08-13T16:15:36+05:30
Becoz of difference in densities
0