三年级有关大自然中一次有趣的发现习作300字200字400字

我家楼下住着一大群蚂蚁。别看它们身材小巧玲珑，它们的秘密可多着呢！　　今天下午，我撕了一粒面包屑兴致勃勃地去观察蚂蚁，我把面包放在泥土上，等待蚂蚁来搬走它。不一会儿，一只瘦小的蚂蚁似乎闻到了香味，来到面包边，咬了一小口，仿佛在说；“真香啊！”它马上要搬面包，可它哪里搬得动。于是，它快速跑到蚁穴旁，找了一只身强力壮的蚂蚁，用触角碰撞那只蚂蚁，身强力壮的蚂蚁心领神会，又去通知第二只、第三四只、第四只……哦，原来蚂蚁交流信息时，是用触角碰撞的，而不是用语言的，我发现蚂蚁了第一个秘密。
　　不过几分钟，蚂蚁已经聚集了很多了，黑压压的一大片，足有几十只，他们雄赳赳、气昂昂地在向面包进军。“奇怪！他们走的路线怎么和第一只蚂蚁一模一样？”我迷惑不解地想。我查了查资料，才恍然大悟：原来，蚂蚁会在爬过的地方留下一种气味，蚁群就可以按照这种气味认路。我又发现了蚂蚁的第二个秘密。
　　这时，蚁群已经到了面包屑旁，它们想齐心协力把面包搬回蚁穴，可还是搬不动。于是，几只蚂蚁迅速爬上面包，把面包撕成一小粒一小粒的，放在地上，然后两三只蚂蚁抬起一小粒面包直奔蚁穴。不一会儿，我的面包全被蚂蚁带回家了。我再次发现了蚂蚁的秘密：搬食物时有时会齐心协力搬回家，有时会把食物分成小块，各自搬回家。
　　看着陆续回巢的蚂蚁，我突然想，如果蚂蚁的气味断了，它们还能认到路吗？我用树枝把蚂蚁爬过的路划了条横线，后面的蚂蚁在横线前停了一下，换了条路，继续向蚁穴奔去。原来，蚂蚁还可以用景物辨别方向。这又是蚂蚁的秘密。
　　只要做个生活的有心人，善于观察，你一定会发现大自然中的许多秘密哦！     

我发现太阳的妙用了
　今天我们上学时，看到太阳挂在天边。远远望去像一个大火球在天空滚滚流动，近看却像一面明亮的大镜子。

　　它放射出的光芒，给人们带来光和热，万物生长全靠它。它的光比金子还宝贵，谁也捉不住它，就像时间一样。

　　我盯着它看了一会儿，一眨眼，眼前就会冒出无穷无尽的小光球，太阳周围的云彩却变成红红的金光了。

　　太阳真美丽！它的奥秘真多，长大后我一定要开发利用它，发明一种设备，平时把太阳的光和热收集起来。转化成电能和光能。那时人们不会有停电的烦恼，在寒冷的冬天，可以有无污染的太阳能供热，不像有污染的烟了。那时，我就是超级大富翁，是世界电王了！哈哈！

　　现在我要努力学习，就像李四光那样善于思考，坚持探究，成为一个有出息的人！

小学

绿色圃贵宾
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板凳
发表于 2011-5-7 17:21:00 |只看该作者
有趣的发现
在我的生活中,有许多的发现,但是,最神奇而有趣的是我发现了鱼是睁着眼睛睡觉的。

　　在我六岁那年，一次，我到伙伴家去玩。刚走进客厅，就被他家的大鱼缸吸引了，我迫不及待地坐到鱼缸前，目不转睛地看着五颜六色、形态各异的鱼。看了好半天，我发现鱼儿的眼睛都是睁着的，眨也没眨一下。我想：“难道鱼不能闭眼吗？睡觉也睁着眼吗？”我问小伙伴，她说也不知道。可是鱼的确是睁着眼睛的呀！我回去问爸爸：“鱼是睁着眼睛睡觉的吗？”爸爸说：“对。”我又问：“那鱼儿为什么睡觉睁着眼呢？死后是睁着眼的吗？”爸爸说：“孩子，你自己动动脑筋就会找到答案。”

　　我带着疑问朝新华书店跑去，我投入书海寻找《十万个为什么》，终于找到了。我全神贯注地查找有关鱼的资料，工夫不负有心人，我终于查到了，原来鱼是没有眼睑的，没有办法闭上眼睛。我们看见鱼在静止的时候，就表示它在休息。但是，它的眼睛仍然是睁开的。我这才恍然大悟，明白鱼睡觉时眼是睁开的，即使在死了之后，仍是睁着眼的。我合上书，喜出望外地走出书店，连忙跑回家去告诉爸爸，爸爸听了我的解释，也很满意，连连夸我是个善于观察、爱动脑筋的好孩子。听了爸爸的夸奖，我心里像吃了蜜一样甜。

　　那天，我发现了鱼在任何时候都是睁着眼睛的。这也让我明白：做任何一件事，都要善于观察，勤于思考，才能得出正确的结果。

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　今天我们上学时，看到太阳挂在天边。远远望去像一个大火球在天空滚滚流动，近看却像一面明亮的大镜子。

　　它放射出的光芒，给人们带来光和热，万物生长全靠它。它的光比金子还宝贵，谁也捉不住它，就像时间一样。

　　我盯着它看了一会儿，一眨眼，眼前就会冒出无穷无尽的小光球，太阳周围的云彩却变成红红的金光了。

　　太阳真美丽！它的奥秘真多，长大后我一定要开发利用它，发明一种设备，平时把太阳的光和热收集起来。转化成电能和光能。那时人们不会有停电的烦恼，在寒冷的冬天，可以有无污染的太阳能供热，不像有污染的烟了。那时，我就是超级大富翁，是世界电王了！哈哈！

　　现在我要努力学习，就像李四光那样善于思考，坚持探究，成为一个有出息的人！

　　山西省原平市青年街小学三年级：武豪吉
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作文网友  发表于 2012-9-2 19:17:37
我家楼下住着一大群蚂蚁。别看它们身材小巧玲珑，它们的秘密可多着呢！　　今天下午，我撕了一粒面包屑兴致勃勃地去观察蚂蚁，我把面包放在泥土上，等待蚂蚁来搬走它。不一会儿，一只瘦小的蚂蚁似乎闻到了香味，来到面包边，咬了一小口，仿佛在说；“真香啊！”它马上要搬面包，可它哪里搬得动。于是，它快速跑到蚁穴旁，找了一只身强力壮的蚂蚁，用触角碰撞那只蚂蚁，身强力壮的蚂蚁心领神会，又去通知第二只、第三四只、第四只……哦，原来蚂蚁交流信息时，是用触角碰撞的，而不是用语言的，我发现蚂蚁了第一个秘密。
　　不过几分钟，蚂蚁已经聚集了很多了，黑压压的一大片，足有几十只，他们雄赳赳、气昂昂地在向面包进军。“奇怪！他们走的路线怎么和第一只蚂蚁一模一样？”我迷惑不解地想。我查了查资料，才恍然大悟：原来，蚂蚁会在爬过的地方留下一种气味，蚁群就可以按照这种气味认路。我又发现了蚂蚁的第二个秘密。
　　这时，蚁群已经到了面包屑旁，它们想齐心协力把面包搬回蚁穴，可还是搬不动。于是，几只蚂蚁迅速爬上面包，把面包撕成一小粒一小粒的，放在地上，然后两三只蚂蚁抬起一小粒面包直奔蚁穴。不一会儿，我的面包全被蚂蚁带回家了。我再次发现了蚂蚁的秘密：搬食物时有时会齐心协力搬回家，有时会把食物分成小块，各自搬回家。
　　看着陆续回巢的蚂蚁，我突然想，如果蚂蚁的气味断了，它们还能认到路吗？我用树枝把蚂蚁爬过的路划了条横线，后面的蚂蚁在横线前停了一下，换了条路，继续向蚁穴奔去。原来，蚂蚁还可以用景物辨别方向。这又是蚂蚁的秘密。
　　只要做个生活的有心人，善于观察，你一定会发现大自然中的许多秘密哦！
着一大群蚂蚁。别看它们身材小巧玲珑，它们的秘密可多着呢！　　今天下午，我撕了一粒面包屑兴致勃勃地去观察蚂蚁，我把面包放在泥土上，等待蚂蚁来搬走它。不一会儿，一只瘦小的蚂蚁似乎闻到了香味，来到面包边，咬了一小口，仿佛在说；“真香啊！”它马上要搬面包，可它哪里搬得动。于是，它快速跑到蚁穴旁，找了一只身强力壮的蚂蚁，用触角碰撞那只蚂蚁，身强力壮的蚂蚁心领神会，又去通知第二只、第三四只、第四只……哦，原来蚂蚁交流信息时，是用触角碰撞的，而不是用语言的，我发现蚂蚁了第一个秘密。
　　不过几分钟，蚂蚁已经聚集了很多了，黑压压的一大片，足有几十只，他们雄赳赳、气昂昂地在向面包进军。“奇怪！他们走的路线怎么和第一只蚂蚁一模一样？”我迷惑不解地想。我查了查资料，才恍然大悟：原来，蚂蚁会在爬过的地方留下一种气味，蚁群就可以按照这种气味认路。我又发现了蚂蚁的第二个秘密。
　　这时，蚁群已经到了面包屑旁，它们想齐心协力把面包搬回蚁穴，可还是搬不动。于是，几只蚂蚁迅速爬上面包，把面包撕成一小粒一小粒的，放在地上，然后两三只蚂蚁抬起一小粒面包直奔蚁穴。不一会儿，我的面包全被蚂蚁带回家了。我再次发现了蚂蚁的秘密：搬食物时有时会齐心协力搬回家，有时会把食物分成小块，各自搬回家。
　　看着陆续回巢的蚂蚁，我突然想，如果蚂蚁的气味断了，它们还能认到路吗？我用树枝把蚂蚁爬过的路划了条横线，后面的蚂蚁在横线前停了一下，换了条路，继续向蚁穴奔去。原来，蚂蚁还可以用景物辨别方向。这又是蚂蚁的秘密。
　　只要做个生活的有心人，善于观察，你一定会发现大自然中的许多秘密哦！
着一大群蚂蚁。别看它们身材小巧玲珑，它们的秘密可多着呢！　　今天下午，我撕了一粒面包屑兴致勃勃地去观察蚂蚁，我把面包放在泥土上，等待蚂蚁来搬走它。不一会儿，一只瘦小的蚂蚁似乎闻到了香味，来到面包边，咬了一小口，仿佛在说；“真香啊！”它马上要搬面包，可它哪里搬得动。于是，它快速跑到蚁穴旁，找了一只身强力壮的蚂蚁，用触角碰撞那只蚂蚁，身强力壮的蚂蚁心领神会，又去通知第二只、第三四只、第四只……哦，原来蚂蚁交流信息时，是用触角碰撞的，而不是用语言的，我发现蚂蚁了第一个秘密。
　　不过几分钟，蚂蚁已经聚集了很多了，黑压压的一大片，足有几十只，他们雄赳赳、气昂昂地在向面包进军。“奇怪！他们走的路线怎么和第一只蚂蚁一模一样？”我迷惑不解地想。我查了查资料，才恍然大悟：原来，蚂蚁会在爬过的地方留下一种气味，蚁群就可以按照这种气味认路。我又发现了蚂蚁的第二个秘密。
　　这时，蚁群已经到了面包屑旁，它们想齐心协力把面包搬回蚁穴，可还是搬不动。于是，几只蚂蚁迅速爬上面包，把面包撕成一小粒一小粒的，放在地上，然后两三只蚂蚁抬起一小粒面包直奔蚁穴。不一会儿，我的面包全被蚂蚁带回家了。我再次发现了蚂蚁的秘密：搬食物时有时会齐心协力搬回家，有时会把食物分成小块，各自搬回家。
　　看着陆续回巢的蚂蚁，我突然想，如果蚂蚁的气味断了，它们还能认到路吗？我用树枝把蚂蚁爬过的路划了条横线，后面的蚂蚁在横线前停了一下，换了条路，继续向蚁穴奔去。原来，蚂蚁还可以用景物辨别方向。这又是蚂蚁的秘密。
　　只要做个生活的有心人，善于观察，你一定会发现大自然中的许多秘密哦！