实验步骤:1.点燃前,先观察_颜色_._状态_._气味_,用刀切割,并投入水中。2.燃烧时:(1),观察___现象___(2).取1根火柴梗拿住其一端___插入火焰约1s后取出____(3)取一只干燥烧杯罩在____蜡烛上____(4)取下烧杯_____加入澄清石灰水____震荡,观察。3.熄灭后,观察到______有白烟_____现象,用火柴取点燃______白烟______,蜡烛能重新燃烧。实验现象:1.蜡烛的外形是____圆柱____-.蜡烛由__()__和__()__组成。颜色__白__,状态__固态__,气味___无__.投入水中后______浮在水面上______2.(1)火焰分为__外焰___.___内焰___.____焰心____3层(2)_________________________(3)________________________________(4)_________________________________3._______________________________________分析结论:1.硬度__小__,密度__比水小__,溶解性____差_____.2._____________________________________3._____________________________________