The study concerning an experimental learning material was carried out in the primary school. A specific feature of the innovative material is topic based on notions related to physics. Seven years old pupils' pre-knowledge of scientific notions have been analysed in the current study. A sample of the vocabulary suggested by the physicists was tested with different groups of respondents: pupils of the first grade, pupils additionally involved in extracurricular activities in the club "Friend of Science" and the students of a teacher training department. The notions selected by the physicists denote the phenomena of energy, space science, atomic and digital study area that up till now were not included in the actual primary school curriculum. As a result of this study, the fact has to be reported that the pupils – not having had any previous lessons on these themes – have given 72% right answers altogether, but the pupils involved in the special club, know nearly all presented notions. There are conclusions drawn from the current study for compiling of texts for beginning reader and for introducing the scientific themes in primary school lessons.