In contrast, horticulturalists usually leave the big trees in place in and around their farm plots. Tree roots help to stabilize the soil. Burning the other wild vegetation converts chemical compounds locked in the plants to a form that is readily useable by their food crops.
Mary Altaffer / Associated Press. The book collection of Maurice Sendak, author of Where the Wild Things Are, is the subject of a lawsuit. The book collection of Maurice Sendak, author of Where the Wild Things Are, is the subject of a lawsuit.
We call materials that have not yet been processed raw materials. Raw materials are made into other things. When raw materials are in the form in which they are found in nature, we can call them natural materials. A natural material is any material that comes from plants, animals, or the ground.NSTRUCTIONS: 1  Your task is to find examples of processed materials in the world around you, particularly non-metals. 2  You must look at why that material has been used and how its properties make it useful to us.