<div style="layout-grid:;
"><div style="text-align: center;"><strong>小学四年级科学(上)第三单元</strong></div><div style="text-align: center;"><strong><br></strong></div><span><div style="text-align: center;"><strong><span>形成性测试参赛试卷(</span><span>时间:60)</span></strong></div></span><br><span><strong>一、填空(每空2分,共28分)</strong></span><br><br><span>1、声音是由__________产生的,声音通过______、_______和_______的________传播。</span><br><br><span>2、向空瓶的口吹气,发出的声音主要是瓶子里的______在振动。</span><br><br><span>3、声音的强弱是指_______ ,声音的_______ 是指音调。</span><br><br><span>4、而不的主要作用是____________;鼓膜的作用是_____________。</span><br><br><span>噪声是听起来__________的声音,噪声和_______、_________一样,已被列为主要的____________之一。</span><br><br><span><strong>二、判断(正确的打“√”,错误的打“×”,每题3分,共15分)</strong></span><br><br><span>1、生意是由物体振动引起的,振动消失后声音不会消失。( )</span><br><br><span>2、太空是一个静悄悄的世界,这是因为太空中没有声音传播的介质。( )</span><br><br><span>3、声音的调节与振动物体的松紧、粗细有关,与物体长短无关。( )</span><br><br><span>4、优美的歌声人人爱听,它不可能是噪音。( )</span><br><br><span>5、保护听力要做到以下三点:①戴上耳塞 ②捂住耳朵 ③离开噪声( )</span><br><br><span><strong>三、排序(1题3分,2题7分,共10分)</strong></span><br><br><span>1、按声音传播的效果将括号中的物质由好到差排序:(气体、固体、液体)</span><br><br><span>①_______ ②_________ ③_______</span><br><br><span>2、按声音的传播路径给标题内的听觉系统排序:(①外耳通 ②耳廓 ③声源 ④听小骨 ⑤耳蜗 ⑥听神经 ⑦鼓膜)</span><br><br><span>①_____ ②____ ③____ ④____ ⑤____ ⑥____ ⑦____</span><br><br><span><strong>四、我会解释(15分)</strong></span><br><br><span>敲小鼓,纸屏加上吊着的小球会跳动起来,请说说其中的道理。</span><br><br><span> <img src="//www.szxuexiao.com/uploadimages/2012/1129/20121129204834.png?m=0.619706854224205"> <img src="//www.szxuexiao.com/uploadimages/2012/1129/2012112920495.png?m=0.9996480860281736"></span><br><br><span style=" text-decoration:underline ; "> </span><span style=" text-decoration:underline ; "></span><br><br><span style=" text-decoration:underline ; "> </span><span style=" text-decoration:underline ; "></span><br><br><span style=" text-decoration:underline ; "> </span><span style=" text-decoration:underline ; "></span><br><br><span style=" text-decoration:underline ; "> </span><span> </span><br><br><span><strong>五、你问我答(每题8分,共16分)</strong></span><br><br><span>1、为什么用力弯曲尺子它不发出声音,而轻轻拨动,它却能发出声音?</span><br><br><span>________________________________________________________________________________________________________________________________</span><br><br><span>2、在“在伏罂而听”的故事中,挖掘声是怎样侦察兵的耳朵里?</span><br><br><span>________________________________________________________________________________________________________________________________</span><br><br><span><strong>六、动手做(16分)</strong></span><br><br><span> 实验:用牙刷把划过梳子齿上,第一次快些,第二次慢些,你发现什么现象?这一现象说明了什么?</span><br><br><span>实验现象:_____________________________________________________</span><br><br><span>________________________________________________________________________________________________________________________________________________________________________________________________</span><br><br><span>结论:__________________________________________________________</span><br><br><span>________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________</span><br><br><br><br></div>
四年级上