On January 15th I did research on Pumping Solids. I learned that certain solids require certain strengths and types of pumps. The most common pump is a piston pump. I also learned that the inside of the pumps casing has to have reinforcing or the casing will rip with so many rough solids such as rocks coming through the "hull" will were out. I is like if you were to be in a mine and you wanted to pump up from a mine to the mine office you could use a piston pump to pump up coal or copper or bronze etc. pumping solids often takes up more energy than pumping liquids for the fact that solids are usually heavier and rougher and so takes up more energy.