A: Styrofoam does not decompose in the environment under normal circumstances. Much like plastic, Styrofoam is made from a polystyrene-based petroleum product that is not biodegradable. Plastic takes hundreds of years to decompose, and Styrofoam takes much longer because it is a stronger form of plastic.
View Full Document. Zone of wastage: Is the area in which melting or ablation rates exceed those of snowfall (Fig.2). â¢ The snow line: Is the boundary between the zone of accumulation and that of wastage, and could therefore be defined as the highest level at which winter snow melts in the summer. VI- Internal structure of a glacier.
Fitness Zone. Exercise in the fitness zone is consistent with a heart rate of 60 to 70 percent of your maximum heart rate. This zone also is a fat-burning zone, with 85 percent of your calories being burned from fat stores.The higher the heart rate, the more calories you will burn.itness Zone. Exercise in the fitness zone is consistent with a heart rate of 60 to 70 percent of your maximum heart rate. This zone also is a fat-burning zone, with 85 percent of your calories being burned from fat stores.