This document discusses different types of materials including natural materials that come from plants, animals or the ground and man-made materials that are made by humans. It provides examples of materials like wool, plastic, cotton, stone and wood and describes some of their properties such as being transparent, opaque, hard, rigid, soft or flexible. The document also notes that metal is attracted to magnets and that objects have mass and volume. Materials can be changed by heating, cooling or bending them and exist as solids, liquids or gases. Houses are made from various materials like windows, walls, doors and chimneys.