00679nam a2200169Ia 450000500170000000800410001702000220005804100080008008200090008810000170009724500440011426400330015830000210019152002770021265000060048965500140049520260914083142.0260914s9999    xx            000 0 und d  a978 0 7496 9602 3  aeng  a523.1 aRILEY, Peter10aEssential Science : Earth, Moon and Sun  aLondonbFranklin Wattsc2010  a32 hlm.c26.5 cm  aHow can you use shadows to tell the time? How big is the moon? What happens during an eclipse? This book answers all these questions and more through :  *factual information an practical investigation  *diagrams and data to help interpret results  *summaries of each topic 4a0  aGrade 7-9