Small school children comes to school,in the preparatory class,with different empirical concepts(notions) about nature and its phenomena,formed following discussions with the adults (parents,educator,etc.)or by their own experience.At this age, the child has knowledge about plants and animals, but these "refers to fragmentary realities, to particular phenomena existent in their experience"(Bogdan and Stanculescu,1970,p.165). this knowledge is related to external,visible,features of the known plants and animals,such as their shape.