UNESCO Source Book for Science Teaching

acid aluminium angle apparatus Attach balance ball balloon beam blade blotting paper blow boiling bottle bottom bulb candle carbon cardboard cell centre clothes peg cm in diameter cm long coil coloured copper wire cork diagram dish drill drinking straw dry cell edge electric experiment Fasten Fill flame flask funnel glass jar glass tube hard water heat hold hole inside iron knitting needle lamp length of glass lens light lime water liquid magnet metal mirror monthly nail observe paper pencil piece Place plants plate pole pressure pupils Remove rheostat rubber band rubber tube science teaching screw Secure sheet shown side simple soap soda straw solder solution specific gravity steel wool stick stopper string strip sulphuric acid surface surface tension teachers temperature test tube thermometer thread vibrations weight wind wood wooden year's subscription zinc