TY JOUR TI Propaedeutic Acquaintance of Fourth-Grade Students with Physics KW subjects of the natural science cycle; the logic of constructing content in a comprehensive school; a modern schoolchild; sensitive period of childhood; information rich environment; early familiarization with physical principles and laws; the formation of scientific thinking; cognitive interest; elective courses. JO Primary Education AU Kartunov, V.A. PY 2018 IS 6 PB INFRA-M Academic Publishing LLC.