<div style="text-align: center;"><font color="#ff0000"><span style="font-family: 宋体; font-weight: bold;">2015年小学</span><span style="font-family: 宋体; font-weight: bold;">三年级科学下册期中测试题</span></font></div><br><span style="font-family: 宋体; font-weight: bold; ">一、</span><span style="font-family: 宋体; font-weight: bold; ">填空</span><span style="font-family: 宋体; font-weight: bold; "></span><br><br><span>1、天平是人们根据____________________原理制成的。用托盘天平测量物品,左盘放________,右边放______,取用砝码时要用</span><span style=" text-decoration:underline; text-underline:single; "> 。</span><br><br><span>2、磁铁指南的一端叫________,用____表示;磁铁指北的一端叫_______,用___表示。磁铁磁性最强的地方是____________。</span><br><br><span>3、太阳表面经常会出现</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>等太阳活动。</span><br><br><span>4、古人计时的工具有:</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>。</span><br><br><span>5、一个完整的电路主要由</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>、</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>四部分组成。</span><br><br><span>6、在一个电路中使用两个小灯泡同时发光的方法有两种,一种是把两个小灯泡</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>在电路里,一种是把两个小灯泡</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>在电路里。</span><br><br><span>7、人体、大地、不纯净的水等都是 </span><span style=" text-decoration:underline; text-underline:single; "> </span><span> 。</span><br><br><span>8、干电池有两个极:</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>和 </span><span style=" text-decoration:underline; text-underline:single; "> </span><span> 。正极用</span><span style=" text-decoration:underline; text-underline:single; "> </span><span> 表示,负极用 </span><span style=" text-decoration:underline; text-underline:single; "> </span><span>表示。</span><br><br><span>9、导体是指</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>的物体,比如:</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>;绝缘体是指_____________的物体,比如</span><span style=" text-decoration:underline; text-underline:single; "> </span><span>。</span><br><br><strong><span>二、</span><span>判断</span></strong><br><br><span>1、</span><span>给齿轮加点油可以减小摩擦力。 ( )</span><br><br><span>2、两个物体接触面的大小不会影响摩擦力的大小。 ( )</span><br><br><span>3、太阳是颗恒星,它的生命是没有尽头的。 ( )</span><br><br><span>4、一天中,阳光下同一物体的影子长短的变化是有规律的:从早晨到正午,影子越来越短,正午最短;从正午到傍晚,影子又会变得越来越长。 ( )</span><br><br><span>5、太阳在天空中位置的变化与我们的生活有着密切的关系。 ( )</span><br><br><span>6、太阳在天空中位置的变化与一天中温度的变化没有关系。 ( )</span><br><br><span>7、要想小灯泡亮起来,只要有电池就可以了。 ( )</span><br><br><span>8、电线的外皮、干电池外面的包装纸和塑料膜都是绝缘体。( )</span><br><br><span>9、干衣服能凉在电线上,因为干衣服不容易导电。 ( )</span><br><br><span>10、电视、冰箱、洗衣机、影碟机中用到的电大多是从发电厂来的( )</span><br><br><span><strong>三、选择题</strong></span><br><br><span>1、要使小灯泡发光,不需要用到下列材料中的( ) </span><br><br><span>A、电池B、导线 C、开关 D、灯座 E、小喇叭F、电池盒 G、导线夹</span><br><br><span>2、下列做法正确的是( )</span><br><br><span>A、湿手拔插头 B、看到高压线断落在地上,用手去捡 </span><br><br><span>C、修理电器时先断开电源 D、爬到变压器上去玩</span><br><br><span>3、发现有人触电,首先应该( )</span><br><br><span>A、赶紧去拉他 B、赶快拨打110 C、拉开电闸,断开电源</span><br><br><span>4、房间中的灯多采用( )的连接方式。 A、串联 B、并联</span><br><br><span>5、</span><span>太阳是一个旋转的高密度炽热气体球,大部分气体是( )。</span><br><br><span>A、氧气 B、</span><span>氦</span><span>气 C、氢气</span><br><br><span>6、</span><span>太阳的直径约为139万千米,是地球的( )倍;太阳的体积是地球的(</span><span> </span><span> );太阳的质量是地球的(</span><span> </span><span> )。 </span><span> </span><br><br><span>A、130万倍 B、33万倍 C、109</span><br><br><span>7、</span><span>人们利用一天中阳光下物体的影子的变化规律,制作了计时的仪器( )。</span><div><span><br></span></div><div><span>A、沙漏 B日晷 C、水钟</span><br><br><span>8、</span><span>下面的物品中,( )没用到磁铁。 </span><br><br><span>A、冰箱门</span><span> </span><span> B、电子表</span><span> </span><span> C、收音机</span><br><br><span>9、</span><span>被称为我国四大发明之一的指南针是用( )制成的。</span><br><br><span>A、火药 B、磁铁 C、木材</span><br><br><span>10、</span><span>将小钢珠放在磁铁各部位的磁性强弱与( )有关。</span><br><br><span>A、所涂的颜色不同 B、距磁铁两端的距离 C、磁铁的粗细</span><br><br><span><strong>三、简答题</strong></span><br><br><span>1.产生影子的条件有哪些?</span><br><br><span>2、现在有两节电池,两个小开关,两个灯泡和足够用的导线,请你设计一个电路,让两个开关分别控制两个小电珠的发光。</span><br><span style="font-family: 宋体; font-weight: bold; "><o:p> </o:p></span><br><br><div style="text-align: center;"><font color="#38761d"><strong>2015年小学三年级科学下册期中测试题答案</strong></font></div><br><strong><span>一、填空</span><span>(每空0.5分,共15分)</span></strong><span></span><br><br><span>1</span><span>、杠杆尺的平衡原理 被称量的物体 砝码</span><span> 镊子</span><span></span><br><br><span style=" ">2、</span><span style=" z-index:1; left:0px; "></span><span>南极S 北极N</span><span> 两极</span><span></span><br><br><span style=" ">3、</span><span>太阳黑子 耀斑 日珥</span><br><br><span style=" ">4、</span><span>沙漏 日晷 水钟 </span><span></span><br><br><span style=" ">5、</span><span>电源 开关 导线 用电器 </span><span></span><br><br><span style=" ">6、</span><span>串联 并联 </span><span></span><br><br><span style=" ">7、</span><span>导体 </span><span></span><br><br><span style=" ">8、</span><span>正极</span><span>,负极,</span><span>+</span><span>-</span><span> </span><span></span><br><br><span style=" ">9、</span><span>容易导电的物体,铁片(答对即可) 不容易导电的物体 陶瓷(答对即可) </span><span></span><br><br><strong><span>二、判断</span><span>(每个1分,共10分)</span></strong><br><br><span>1、√ </span><span>2</span><span> × </span><span>3</span><span> × </span><span>4</span><span> √ </span><span>5</span><span> √ </span><span>6</span><span> ×</span><span>7</span><span> × </span><span>8</span><span> √ </span><span>9</span><span> √ </span><span>10</span><span> √ </span><span></span><br><br><strong><span>三、选择</span><span>(每个1分,共10分)</span></strong><span></span><br><br><span>1、E</span><span> </span><span> 2、C </span><span>3、</span><span>C </span><span> 4、</span><span>A</span><span> 5</span><span>、C</span><span> 6</span><span>、C</span><span> </span><span> </span><span>7、</span><span>B</span><span> 8、</span><span>B</span><span> </span><span> </span><span>9、</span><span>B </span><span> 10、</span><span>B </span><span></span><br><br><strong><span>四、简答题</span><span>(第一小题10分,第二小题15分,共25分)</span></strong><span></span><br><br><span>1</span><span>、光和不透明的物体。</span><br><br><span>2</span><span>、</span><br><br><img src="//www.szxuexiao.com/uploadimages/2015/0429/2015429162034.png?m=0.08196106972172856"><br></div>
三年级下