The only item that can be found on earth in three different phases of matter at standard pressure is water( H2O).
1) Below 0 C water is a solid at Standard Pressure.
2) 0 C to 100 C = it is a liquid
3) A gas above 100 C is and becomes steam.
Hence, we conclude that water is the only possible compound found on the earth which is found in the three different phases of earth .
