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时间:2019-05-09
《7_空气有重量吗》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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5、u/科学课件:www.1ppt.com/kejian/kexue/物理课件:www.1ppt.com/kejian/wuli/化学课件:www.1ppt.com/kejian/huaxue/生物课件:www.1ppt.com/kejian/shengwu/地理课件:www.1ppt.com/kejian/dili/历史课件:www.1ppt.com/kejian/lishi/托盘天平的特点把天平调平衡后,两边放上物体,如果重量相等,天平就会保持平衡,如果重量不相等,天平的指针就会偏向重的一边。简易天平简易天平保持平衡简易天平取下其
6、中一个气球,充足气,再放回原来的位置,观察天平有什么变化?简易天平重轻简易天平保持平衡简易天平取下其中一个气球,放掉气,再放回原来的位置,观察天平有什么变化?简易天平重轻形状占据空间体积流动重量固定不固定能不能易压缩不易压缩能不能较重很轻石头√√√√水√√√√空气√√√√√√√空气是什么样的?透明无色无味会流动易压缩能占据空间重量较轻空气挑战课外一个像课桌一样大的箱子里装的空气约有500克,差不多有两个苹果那么重,而弥漫在天空和地球周围的空气有多重呢?查阅资料,班内交流。只要细心观察,主动探究,你就会成为科学的主人!PPT模板下载
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