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苏科版物理教材八年级5.4 世界是运动的练习设计
世界是运动的同步练习1
上传人： ekteacher 公开等级： 完全共享 等级： 四星级 下载积分： 67
四、世界是运动的 课前热身     1962年11月，美国马里兰州上空一架飞机与一只天鹅相撞，发动机受到严重破坏，酿成飞机坠毁、机上17人全部遇难的悲剧。为防止“鸟蛋”的侵害，大型机场都配备了驱鸟设备。天鹅的质量和飞行的速度并不大，为什么体型庞大的飞行却害怕天鹅或其他的小鸟呢？   同步探究（重点设计部分） 一、选择题 1．下列运动中不是机械运动的是（    ）   a．天空飘动的白云                   b．流动的河水 c．放在水中的食盐正在溶解           d．自行车在公路上转弯 第2题 2．如图，受油机与大型加油机在空中以两样的速度向同一方向水平飞行。下列说法中，正确的是  （    ） a．选地面为参照物，受油机是静止的 b．选受油机为参照物，加油机是静止的 c．选加油机为参照物，受油机是运动的 d．选地面为参照物，加油机是静止的 3．一人骑自行车由东向西行驶，这里有辆汽车从他后面向西疾驶而过，若以这辆车为参照物，此人（    ）   a．向东运动                    b．向西运动   c．不运动                    

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