“物态变化”小实验──纸“锅”烧水

“物态变化”小实验纸“锅”烧水DIV.MyFav_1288926641465 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 DIV.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 P.MsoBodyTextIndentTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 LI.MsoBodyTextIndentTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 DIV.MsoBodyTextIndentTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1288926641465 SPAN.text11COLOR: #4b5029; LETTER-SPACING: 3291.2ptDIV.MyFav_1288926641465 DIV.Section1page: Section1【提出问题】纸的着火点是183，一般火焰的温度约600，能用纸做的锅在火上把水烧开吗？【猜想与假设】根据纸的着火点、水的沸点。我猜想：_。【制定计划 设计实验】实验材料：牛皮纸、蜡、火柴、水。实验方法与步骤：1剪一块边长为10cm的正方形牛皮纸，在纸面上打一层薄蜡，放在炉子上烘烤一下，蜡即熔化，全部浸在纸里了。图1 图22把浸过蜡的牛皮纸按图1所示的虚线折叠起来，用胶水粘牢、晾干，即成一个小纸盒，如图2所示。3在纸盒里装半盒水，放在用粗铁丝制成的支架上，用酒精灯从底部加热，不多时就能够把水烧开，而纸盒完好无损。友情提示：纸盒必须是不渗水的，否则由于不断有水渗出，由于水