Sealing the Dike- To seal a dike you need a sheet of plastic to improve water tightness. Put sandbags on top and bottom of the dike to weight the plastic down. Try not to puncture it. Sand- Sand is a mass of minerals. It is made of very fine grains.
Sand is made of Mica, feldspar, magnetite, and other minerals.
It is very important to soil. Sand is formed through the process of erosion. When sand is first formed it is very sharp. After a while it becomes smaller and more rounded by wind and water. Sand is used to make many things.