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.
4. How big is the hadal zone? The hadal zone comprises a series of disjointed trenches and other deep spots. There are 33 trenches and 13 troughs around the world â 46 individual hadal habitats in total. The mean depth of the trenches is 8.216km. The total area of the hadal zone is less than 0.2% of the entire seafloor but accounts for 45% of the total depth range. It is therefore surprising that the deepest 45% of the sea is rarely mentioned in deep sea literature.