二年级语文上册课文11《小蝌蚪找妈妈》同步阅读小蝌蚪的饲养观察记录素材新人教版.doc

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1小蝌蚪的饲养观察记录一在水田里,我发现了许多白色的小颗粒,像油菜籽那样大,外面是白色的,摸起来软、滑;里面是黑色的。我小心地把它们用手捧起来,放在瓶子里带回家。在家里,我用一个大口的瓶子,装上干净水,放入一些碎菜叶,给小蝌蚪的卵搭建一个舒适的家。二每隔两天我就给它换一次水,顺便观察小蝌蚪卵的变化。一天,我突然发现有几个小黑点在水里动来动去的,仔细观察才发现它长着圆身子,拖着一小点尾巴。小蝌蚪终于诞生了,我感到既惊奇又高兴。此后,我天天给它喂洗干净了撕碎的小菜叶,小家伙开始排便,要帮它们打扫卫生,一天要给它们打扫一次,真累呀!三尽管有点累,看到小家伙一天天长大,它们快活地在水里游来游去,我还是坚持给它们换水、打扫卫生、喂菜叶。我还在水瓶里放入几块露出水面的石头。大约过了两个星期,小蝌蚪长出了两条后腿。又过了18天,前腿也长出了。四自从小蝌蚪长出前腿和后腿后,它们游得更快了,吃得也多了。有些时候,它们会把小嘴露出水面,好像在呼吸空气。过了20天左右,我悄悄地走进水瓶,发现有两只爬在石头上,它们似乎发现了我,一下子钻进水里,小蝌蚪为什么要爬到石头上去呢?我仔细观察才发现,原来小蝌蚪已经没有腮了,它爬到石头上去,可能是为了呼吸空气吧,因为我们人也要呼吸空气才能够活下去的。五大约有过了14天,小蝌蚪的尾巴也不见了,它们已经变成真正的青蛙了。我和我的好朋友一起把它们放回水田里。2

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