00592nam a2200169Ia 450000500170000000800410001702000220005804100080008008200100008810000170009824500390011526400330015430000210018752001940020865000060040265500140040820260914083142.0260914s9999    xx            000 0 und d  a978 0 7496 9603 0  aeng  a535.31 aRILEY, Peter10aEssential Science : LIght & Seeing  aSidneybFranklin Wattsc2010  a32 hlm.c26,5 cm  aWher does light come from? Why can't we see in the dark? Why do we have shadows? This book answers all these questions and more through: factual information and practical investigation etc. 4a0  aGrade 7-9