自然教材有一实验是这样设计的:将黑色铁片和白色铁片同时放在阳光下晒10分钟,然后用手摸一摸,他们的热有什么不同?但这个实验做起来,不仅需要的时间长,而且效果也不明显。为此,我制作了这样一个实验,方法是: 1.找一个易拉罐,把顶和底去掉,然后对半剪开,将其中一半的里面涂成黑色,另一半不涂色。 Natural textbook An experiment is designed like this: the black iron and white iron at the same time in the sun for 10 minutes, and then touch the hand, what is the difference between their heat? But this experiment to do it, not only the time Long, but the effect is not obvious. To that end, I made such an experiment by: 1. Locating a can, removing the top and bottom, then half-cutting, half of the inside painted black and the other half untainted.