The dissolved salts in the sea come from freshwater tributaries, which contain a small amount of salt that remains in the sea as the corresponding water evaporates. This means that the salt in the ... read more
Concerning a conception of functional groups based on biological processes
The functional groups of classical organic chemistry prove highly suited for classification purposes when their ... read more
Transformation forces of the air
a contribution to the chemistry main lesson of the 9th class of Waldorf schools
We present a guide for the chemistry main lesson of the 9th clas... read more
Aspects of a natural classification of plant substances according to their formative processes
The question of the classification of plant primary and secondary substances is repeatedly r... read more