The first subunit deals with getting to know plastic, its marking, separation and recycling. Due to its
properties, plastic has a wide range of use in all spheres of human activities. In competition with classical materials, mainly metals, polymers have succeeded mostly because of their easy processing, low density and a convenient ratio of utility qualities and price.
Pupils acquire knowledge of plastic from everyday life and they will deepen it in this subunit. They will learn to identify symbols used to mark plastic and those on plastic packing and they will verify different properties of plastic by experiment.