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GENERAL SCIENCE FOR CLASS 9 UNIT NO.1

UNIT# 01   IMPORTANT DEFINITIONS  Element :         A substance composed of atoms with same atomic number is called element. Compound             A substance containing more than one element is called compound. For example water, carbon dioxide, sugar etc. Molecule         A group of atoms bonded together is called molecule. Photosynthesis           The conversion of water and carbon dioxide by plants into glucose and oxygen is called photosynthesis Q-A      Select the best answers for the following questions. 1. Science is originated from a Latin world Scientia, which means to…… a.                     Know b.      ...