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通过前面的学习,学生已经将声音与振动联系起来。在本课,学生将探索声音的另一属性——音高。本课有以下活动:
1.探索铝片琴发出高低不同声音的原理
2.探索口琴发出高低不同声音的原理
3.探索尺子发出高低不同声音的原理
","type":1},{"ext":{"unique_id":"addfe86ad433baf19d89048c69920b7f"},"img_height":2000,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/9bfdebb7e7f742f8830d308049eee55b__jpeg.heic","img_width":2666,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"999f7f1d5bfa58a2576d13950b8c8d04"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"二、课堂反思活动一:探索铝片琴发出高低不同声音的原理
1.这一活动比较简单,让学生敲击琴片,边敲边听边思考:高低不同的声音是怎样产生的?活动前我担心学生不明白什么是高音,什么是低音,如果学生不清楚需要老师提醒。
2. 爱牛为每个铝片琴配了2根敲击棒,课上建议老师只给学生1根,这样可以避免小组内有2名同学同时敲击铝片琴,不便于观察。
3. 每个铝片琴还有一张乐谱,课前我还想带领孩子们一起玩一下,课上确没有留出时间敲击乐谱,有点遗憾。
","type":1},{"ext":{"unique_id":"285d52ab6d7abac7c7aacf6654d9063c"},"img_height":1712,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/9adc0ec6-01fd-4680-8903-86e70f7bfae2__jpg.heic","img_width":1284,"source":1,"source_platform":"local","splicing_template_id":201,"type":1},{"ext":{"unique_id":"7ec6417bc63b5b0639fad0844c93cc29"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"活动二:探索口琴发出高低不同声音的原理这一活动主要是了解口琴的结构,探究口琴发出高低声音的原理。只有一个口琴,活动中找一个同学上来吹口琴,其余同学说说自己的发现。在探究口琴发出高低不同声音时,我将口琴拆开,大屏幕展示,学生很快就会发现簧片有的长、有的短,得出声音的高低与口琴簧片的长短有关。
","type":1},{"ext":{"unique_id":"aeac6a52425596d8660955b9156f3874"},"img_height":2000,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/c4c91457bbac48ee9deb0f3d50e62a6a__jpeg.heic","img_width":2666,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"d0b708abd3910170f3ab424b7f2e5bdd"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"活动三:探索尺子发出高低不同声音的原理这一活动中,我们选取了长短不一的4个数据,学生反复实验,探究声音的高低与物体的长短之间的关系,以及声音的高低与物体振动之间的关系。教学中,需要提醒学生不仅要听尺子发出声音的高低,还要从侧面观察尺子振动的快慢。活动中学生容易发现伸出桌面长的发出声音低,振动慢;距离短的发出声音高,振动快。
","type":1},{"ext":{"unique_id":"5621631d82abd505cc8b55c45ee82727"},"img_height":2666,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/30e16eb1a9ce484c84692afc0384c3b3__jpeg.heic","img_width":2000,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"d2e7b4cd0fe32e9f50fa8bcbb6f30fb5"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"三、爱牛材料反馈本课实验材料很多,铝片琴、尺子都足够本课的实验。口琴我只看到一个,如果能满足每个小组实验,学生亲手拆开,组装,这一实验效果可能会更明显。
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1.探索铝片琴发出高低不同声音的原理
2.探索口琴发出高低不同声音的原理
3.探索尺子发出高低不同声音的原理
","type":1},{"ext":{"unique_id":"addfe86ad433baf19d89048c69920b7f"},"img_height":2000,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/9bfdebb7e7f742f8830d308049eee55b__jpeg.heic","img_width":2666,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"999f7f1d5bfa58a2576d13950b8c8d04"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"二、课堂反思活动一:探索铝片琴发出高低不同声音的原理
1.这一活动比较简单,让学生敲击琴片,边敲边听边思考:高低不同的声音是怎样产生的?活动前我担心学生不明白什么是高音,什么是低音,如果学生不清楚需要老师提醒。
2. 爱牛为每个铝片琴配了2根敲击棒,课上建议老师只给学生1根,这样可以避免小组内有2名同学同时敲击铝片琴,不便于观察。
3. 每个铝片琴还有一张乐谱,课前我还想带领孩子们一起玩一下,课上确没有留出时间敲击乐谱,有点遗憾。
","type":1},{"ext":{"unique_id":"285d52ab6d7abac7c7aacf6654d9063c"},"img_height":1712,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/9adc0ec6-01fd-4680-8903-86e70f7bfae2__jpg.heic","img_width":1284,"source":1,"source_platform":"local","splicing_template_id":201,"type":1},{"ext":{"unique_id":"7ec6417bc63b5b0639fad0844c93cc29"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"活动二:探索口琴发出高低不同声音的原理这一活动主要是了解口琴的结构,探究口琴发出高低声音的原理。只有一个口琴,活动中找一个同学上来吹口琴,其余同学说说自己的发现。在探究口琴发出高低不同声音时,我将口琴拆开,大屏幕展示,学生很快就会发现簧片有的长、有的短,得出声音的高低与口琴簧片的长短有关。
","type":1},{"ext":{"unique_id":"aeac6a52425596d8660955b9156f3874"},"img_height":2000,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/c4c91457bbac48ee9deb0f3d50e62a6a__jpeg.heic","img_width":2666,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"d0b708abd3910170f3ab424b7f2e5bdd"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"活动三:探索尺子发出高低不同声音的原理这一活动中,我们选取了长短不一的4个数据,学生反复实验,探究声音的高低与物体的长短之间的关系,以及声音的高低与物体振动之间的关系。教学中,需要提醒学生不仅要听尺子发出声音的高低,还要从侧面观察尺子振动的快慢。活动中学生容易发现伸出桌面长的发出声音低,振动慢;距离短的发出声音高,振动快。
","type":1},{"ext":{"unique_id":"5621631d82abd505cc8b55c45ee82727"},"img_height":2666,"img_url":"https://ss-mpvolc.meipian.me/users/5995583/30e16eb1a9ce484c84692afc0384c3b3__jpeg.heic","img_width":2000,"source":0,"source_platform":"local","splicing_template_id":0,"type":1},{"ext":{"unique_id":"d2e7b4cd0fe32e9f50fa8bcbb6f30fb5"},"source":0,"source_platform":"local","splicing_template_id":0,"text":"三、爱牛材料反馈本课实验材料很多,铝片琴、尺子都足够本课的实验。口琴我只看到一个,如果能满足每个小组实验,学生亲手拆开,组装,这一实验效果可能会更明显。
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