<div style="text-align: center;"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: blue; FONT-SIZE: 14pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">小学五年级科学(下)第四单元测试题</span></strong></div><span style="border-width: thin; table-layout: fixed; border-color: white; height: 100%;" id="SPAN1">
<br><div style="text-align: center;"><span style="font-family: 宋体; font-size: 12pt; line-height: 150%;">班级</span><span style="font-family: 宋体; font-size: 12pt; line-height: 150%; text-decoration: underline;"> </span><span style="font-family: 宋体; font-size: 12pt; line-height: 150%;"> </span><span style="font-family: 宋体; font-size: 12pt; line-height: 150%;">姓名</span></div>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>一、我会填。(<span>3*15=45</span>分)</strong></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球自转和地球公转的方向都是(<span style="COLOR: red">自西向东</span>),即( <span style="COLOR: red">逆</span> )时针。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球的公转就是地球围绕( <span style="COLOR: red">太阳 </span>)运动,地球公转一周是( <span style="COLOR: red">一年</span> )。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球的自转就是地球围绕(<span style="COLOR: red">地轴 </span>)运动,地球自转一周是( <span style="COLOR: red">一天</span> )。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、昼夜交替是由地球( <span style="COLOR: red">自转 </span>)引起的,四季更替是由地球(<span style="COLOR: red">公转</span> )引起的。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">5</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(<span style="COLOR: red">傅科摆</span> )的实验证明了地球是在自转。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">6</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、南极圈和北极圈内经常会出现几个月看不到太阳的现象,我们把这种现象叫做( <span style="COLOR: red">极夜</span>),有时候几个月太阳不下山,我们把这种现象叫做( <span style="COLOR: red">极昼</span><span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">7</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球的(<span style="COLOR: red">自转 </span>)决定了不同地区迎来黎明的时间不同,东边(<span style="COLOR: red">早</span>)西边(<span style="COLOR: red">晚</span> )。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">8</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球转动时,地轴始终倾斜着指向(<span> </span><span style="COLOR: red">北极星</span> )。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>二、我会辨。(<span>3*6=18 </span>分)</strong></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">( <span style="COLOR: red">√</span><span> </span>)<span>1</span>、极地一年中有长长的白天或长长的黑夜现象。<span> </span></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">( <span style="COLOR: red">×</span><span> </span>)<span>2</span>、世界各地新年的钟声都是同时敲响的。<span> </span></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">( <span style="COLOR: red">√</span>)<span>3</span>、 北极星就是我们地轴北极的上空,所以在我们看来是一直不动的,永远在北方。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">( <span style="COLOR: red">√</span> )<span>4</span>、坐在向前行驶的车上,看窗外的物体是向后移动的。<span> </span></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">( <span style="COLOR: red">×</span><span> </span>)<span>5</span>、由于地球的自转,地球上出现四季更替的现象。<span> </span></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(<span> </span><span style="COLOR: red">×</span> )<span>6</span>、所有的日月星辰都是绕着地球旋转的。<span> </span></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>三、我来选择。(<span>2*10=20</span>分)</strong></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、太阳的东升西落,昼夜的交替,正确的解释是(<span> <span style="COLOR: red">A </span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球自转<span> B</span>、地球围着太阳转<span> C</span>、地球围着太阳公转的同时也自转</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、首先用实验证明地球在自转的科学家叫<span> ( <span style="COLOR: red">A</span> )</span>。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、傅科<span> B</span>、哥白尼<span> C</span>、托勒密</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球仪上连接南北两极,指示南北方向的线叫做(<span> <span style="COLOR: red"> C </span> </span>)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、赤道<span> B</span>、纬线<span> C</span>、经线</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、在北部的星空中,有七颗星组成勺子的模样,这七颗星被称为( <span style="COLOR: red"> B</span><span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、勺星<span> B</span>、北斗星<span> C</span>、北极星</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">5</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、下面最先迎来黎明的城市是(<span> <span style="COLOR: red">B</span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">.重庆<span> B</span>.杭州<span> </span> <span> C</span>.乌鲁木齐</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">6</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、在世界时区图中,每相邻的两个时区的时间就相差(<span> <span style="COLOR: red">C</span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">.<span>24</span>小时<span> B</span>.<span>12</span>小时<span> C</span>.<span>1</span>小时</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">7</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、“地心说”理论认为(<span> <span style="COLOR: red">B </span> </span>)是宇宙的中心。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">.太阳<span> </span> <span>B</span>.地球<span> </span> <span> C</span>.月球</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">8</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、<span>0</span>度经线在下列哪个国家?(<span> <span style="COLOR: red">C</span> </span>)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、美国<span> B</span>、法国<span> C</span>、英国<span> D</span>、中国</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">9</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球上的一年四季形成原因是:<span> </span>(<span> <span style="COLOR: red">B</span> </span>)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、太阳离我们的远近。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、地球的公转使太阳光线照射在我们地球上的角度不同。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、星星的位置在不断地移动。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">D</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、极昼极夜的影响。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">10</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、南极考察的最佳季节是北半球的(<span> <span style="COLOR: red">C</span> </span>)。</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、春季<span> B</span>、夏季<span> C</span>、冬季</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>四、让我来解释<span> </span>(<span>17</span>分)</strong></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1 </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">说说北极星“不动”的秘密是什么?(<span>4</span>分)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:北极星不动是相对的。是因为地球的自转和地轴倾斜产生的现象。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2 </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">说说极昼极夜现象的解释。(<span>4</span>分)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:极昼极夜是地球的公转和地轴倾斜产生的现象。由于太阳直射点不同,使得南极和北极都会出现大约半年时间的极昼和极夜。北极是极昼时,南极就是极夜。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3 </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">地球运动的方式有哪些?地球的这些运动方式会产生什么样的影响?(<span>5</span>分)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:地球运动的方式有自转和公转。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">地球的自转会产生:昼夜交替、北极星不动、不同地区迎来黎明的先后不同;地球的公转会产生:四季交替和极昼极夜现象。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4 </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">为什么一年有春夏秋冬四季?(<span>4</span>分)</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:由于地球绕太阳公转,地轴又是倾斜,使得太阳在地球上的直射点发生变化,太阳直射的地方温度高、斜射的地方温度低,因此出现春夏秋冬四季。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br></span>
五年级