They will be able to explain characteristics of a physically constructed model and make judgements about design effectiveness. Students will also be able to analyze the data collected and come to the conclusion that prevention is easier than clean up. Background Some types of metals, like gold, silver, brass and copper are so valuable you would never dream of throwing them away. Steel is the most recycled material in America. Steel is made from iron ore which is magnetic.
Steel cans are magnetic so magnetic belts can be used to separate cans from other garbage.
Some communities team up with other localities and send there garbage to a materials recycling facility for processing. These plants, MRFs, sort the trash into glass, metal, and other recyclable products. Magnets, sieves, and blowers are used to help separate the trash into separate recycling categories. Steel can be recycled again and again,saving energy and natural resources each time. Ask students for examples of litter.