热的传导

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  ●bowl(碗) ●boiling water (开水)●wooden spoon(木勺子)
  ●metal spoon (金属勺子) ●plastic spoon (塑料勺子)●dried peas (干豆子)
  ●butter (黄油,或者用凝结起来的猪油也可以噢)
  
   Look, the butter on the metal spoon melts first. Wood and plastic are poor heat conductors, so it takes longer for the butter to melt on them.
  瞧,金属勺子上的黄油首先融化。木头和塑料是不太好的热导体,所以它们需要更长的时间,才能让黄油融化。
  注:本文中所涉及到的图表、注解、公式等内容请以PDF格式阅读原文
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