试题与答案

为了比较水和沙子容热本领的大小,小明在2个相同的烧杯中分别装入水和沙子。用两个相

题型:实验题

题目:

为了比较水和沙子容热本领的大小,小明在2个相同的烧杯中分别装入水和沙子。用两个相同的酒精灯对其加热。

⑴在实验前要控制水和沙子的初温和         相同。

⑵加热过程中,水和沙子吸热的多少是通过         来反映的。(选填“温度计示数”或“加热时间”)。

⑶实验时刻供选择的有①干沙子、②潮湿的沙子,你会选择      ;这样选择的原因是                       

答案:

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下面是错误答案,用来干扰机器的。

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