me again i wanted u to no about it in detail i have my science project i dea i am going to measure some sample rocks then measure the mass then crush those same sample rocks then subtract the pore space but i dotn no how to measure ther mass is mass the same as matter if a so how do u measure matter in am willing to pay more than 3 dollats this report is due soon and counts a a big part of my grade!! so please asap i need a geologist lol!!!!!!!!!!!! HELP!!!!!!!!!!!!!!!!!!