乐乐课堂-小小科学家

• file:32.对人体吸入的空气和呼出的气体的探究.mp4
• file:17.光的折射.mp4
• file:34.明矾净水.mp4
• file:19.探究凸透镜成像的规律.mp4
• file:30.摩擦起电.mp4
• file:29.磁场对通电导线的力的作用.mp4
• file:31.对蜡烛及其燃烧的探究.mp4
• file:27.汤勺变磁铁.mp4
• file:26.探究浮力大小的影响因素.mp4
• file:28.影响电磁铁磁性强弱的因素.mp4
• file:33.铁与氧气的反应.mp4
• file:37.制取炭黑.mp4
• file:35.软水和硬水的鉴别.mp4
• file:18.透镜的作用（会聚,发散）.mp4
• file:03.探究可传声的介质.mp4
• file:21.物体间力的作用是相互的.mp4
• file:05.影响音调的因素.mp4
• file:38.鸡蛋壳和醋精的反应.mp4
• file:11.纸杯烧水.mp4
• file:07.神奇的水瓶.mp4
• file:36.自制简易净水器.mp4
• file:24.连通器.mp4
• file:06.探究音调与琴弦的关系.mp4
• file:14.光沿直线传播.mp4
• file:09.探究水沸腾.mp4
• file:22.探究影响压力作用效果的因素.mp4
• file:42.自制白糖晶体.mp4
• file:15.探究光反射时的定律.mp4
• file:39.淬火和回火.mp4
• file:43.自制汽水.mp4
• folder:乐乐课堂-小小科学家