Pressing Oil from Seeds 　　【T1】________________by using pressure. A machine【T2】________________is often used. The first step in p

Pressing Oil from Seeds
        Oil is separated from seeds by using pressure. A machine called a press is often used. The first step in pressing the oil from seeds is to crush the seeds between two stones. A cloth container or bag is filled with the crushed seeds. Then the bag is hung up. Some of the oil will flow out of the bag and can be collected. But some oil will remain in the crushed seeds inside the bag. The easiest way to get the rest of the oil out is to place heavy rocks on the crushed material.