sentence: Water pushes the wheel causing it to spin.
sentences_before: A 'grist mill' consists mainly of a waterwheel and 2 stones for grinding grain into flour.
sentences_after: This movement causes an axle inside to turn. The axle is connected to a gear which causes the grinding stones to spin. At the top, there is a chute filled with grain. The grain slowly falls through into the grinding stones.
concept_name: water
headings: Gristmill
categories: Grains