the bottom of the space is made of 70% sky & most california over 50% of something ->  most of earth's surface is made of oceans  most of earth's surface is made of oceans & the father is a thin sinking of land dinosaur the space 's bottom ->  most of the hydroshpere is made of oceans  most of the hydroshpere is made of oceans & the coil of inorganic birthplace is usually lost in the sky -> most of the formation of organic rocks in the hydroshpere occurs in the oceans