<span style=" font-weight:bold; ">一、我会填空</span><span style=" font-weight:bold; ">（共15分） </span><span style=" font-weight:bold; "></span><br><br><span>1</span><span>．风向是指</span><span style=" text-decoration:underline ; "> </span><span>，</span><span>它可以用</span><span style=" text-decoration:underline ; "> </span><span>来测量。风向标的箭头指向风</span><span style=" text-decoration:underline ; "> </span><span>的方向。如指向标的箭头指向西北，就是</span><span style=" text-decoration:underline ; "> </span><span>风。</span><span style=" font-weight:bold; "></span><br><br><span>2</span><span>．</span><span>能溶解水的有</span><span style=" text-decoration:underline ; "> </span><span>、</span><span style=" text-decoration:underline ; "> </span><span>、</span><span style=" text-decoration:underline ; "> </span><span>，不能溶解的有</span><span style=" text-decoration:underline ; "> </span><span>、</span><span style=" text-decoration:underline ; "> </span><span>。</span><br><br><span>3</span><span>酒精灯的火焰分为</span><span style=" text-decoration:underline ; "> </span><span>、</span><span style=" text-decoration:underline ; "> </span><span>、</span><span style=" text-decoration:underline ; "> </span><span>三个部分。</span><span> </span><br><br><span>4、水能溶解</span><span style=" text-decoration:underline ; "> </span><span>体和</span><span style=" text-decoration:underline ; "> </span><span>体，还能溶解少量的氧气等</span><span style=" text-decoration:underline ; "> </span><span>体。</span><br><br><span style=" font-weight:bold; ">二、我会判断。</span><span style=" font-weight:bold; ">（对的打“√”，错的打“×” 共10分）</span><br><br><span>（ ）</span><span>1</span><span>．水能溶解任何物质。</span><span> </span><br><br><span>（ ）2、同一时间，阳光下和背阴处的温度一定是相同的。</span><br><br><span>（ ）</span><span>3</span><span>．已经溶解的物质还能用过滤的方法从水中分离出来。</span><span> </span><br><br><span>（</span><span> </span><span>）</span><span>4</span><span>．在相同条件下，不同的物质在水中的溶解能力是不同的。</span><span> </span><br><br><span>（ ）</span><span>5、 </span><span style=" letter-spacing:; ">过滤时漏斗里的液面要低于滤纸的边缘</span><br><br><span style=" letter-spacing:; ">（ ）6、</span><span>搅拌可以加快物质的溶解。</span><br><br><span>（ ）7、</span><span>食糖在水中溶解后，中间的地方最甜。</span><span> </span><br><br><span>（ ）8、</span><span style=" letter-spacing:; ">每天记天气很麻烦，也没必要。</span><span style=" letter-spacing:; "></span><br><br><span style=" letter-spacing:; ">（ ）9、天气预报中的不同符号表示不同的天气</span><span style=" letter-spacing:; "></span><br><br><span style=" letter-spacing:; ">（ ）10、</span><span>温度、风向、降水量、云量都是天气日历中重要的记录数据。</span><span style=" letter-spacing:; "></span><br><br><span style=" font-weight:bold; ">三、我会选择</span><span style=" font-weight:bold; ">（共57分）</span><br><br><span>1、猜测下面哪一种物体可能不会溶解于水（ ）。</span><br><br><span>A、薯片 B、奶糖 C、巧克力</span><span> </span><br><br><span>2、下列哪一种现象是属于五级风（ ）。</span><br><br><span>A、带叶小树摇 B、迎风走不便 C、叶动红旗展</span><br><br><span>3、在油里滴几滴水，水会（ ）。</span><br><br><span>A. 沉在油底，不能在油中溶解 B、浮在油上，不能在油中溶解</span><br><br><span>C、在油中溶解了</span><br><br><span>4、下列方法哪种使砂糖能很快溶解。（ ）</span><br><br><span>A、搅拌 B、既加热又搅拌 C、加热</span><br><br><span>5、我们可以用（ ）的方法，把食盐从盐水中分离出来。</span><br><br><span> A、过滤 B、蒸发 B、沉淀</span><br><br><span>6、 下列哪个图形表示的是多云。（ ）</span><br><br><img src="//www.szxuexiao.com/uploadimages/2012/1108/2012118144339.jpg?m=0.5298885714728385"><br><br><span>7、</span><span style=" letter-spacing:; ">24小时降水量是20毫米，它应该是（ ）。 </span><span style=" letter-spacing:; "></span><br><br><span style=" letter-spacing:; ">A、中雨 B、小雨 C、大雨</span><span style=" letter-spacing:; "></span><br><br><span>8、</span><span> 酒精灯熄火时，正确的方法是（</span><span> </span><span>）。</span><br><br><span>A．</span><span>用扇子扇灭 </span><span>B．</span><span>用灯帽盖灭后，需掀开再重盖一次</span><span> C．</span><span>用嘴吹灭 </span><br><br><span>9、当红旗的飘向西面时，这时的风向是( )。</span><br><br><span>A</span><span>.</span><span> </span><span>南风</span><span> B</span><span>. 西风</span><span> C</span><span>. 东风</span><br><br><span>10</span><span>．在利用酒精灯加热蒸发皿分离盐水中的盐和水时，下列说法中错误的是（</span><span> </span><span>）。</span><br><br><span>A</span><span>．注意使用酒精灯的安全</span><span> B</span><span>．在盐水还未完全蒸发之前熄灭酒精灯</span><br><br><span>C</span><span>．蒸发皿中的食盐颗粒十分细小</span><span> D</span><span>．加热完后，立即用手把蒸发皿放到桌面上</span><br><br><span>11</span><span>．一杯浓盐水的底部还有未溶解的盐，我们可以用下列哪种方法使杯底的盐溶解（</span><span> </span><span>）。</span><br><br><span>A</span><span>．往杯中加水</span><span> B</span><span>．不断搅拌</span><span> C</span><span>．使杯中的水蒸发</span><br><br><span>12</span><span>．把一杯浓盐水放在窗台上，让杯里的水蒸发。如果杯中的水全部蒸发了，原先溶解在水里的盐会（</span><span> </span><span>）。</span><br><br><span>A</span><span>．不会蒸发，会留在杯底</span><span> B</span><span>． 不见了，跟水一样蒸发了</span><br><br><span>13</span><span>．下列哪种方法在嘴里溶解方糖最快？（</span><span> </span><span>）</span><br><br><span>A</span><span>．含在嘴里不动</span><span> B</span><span>．咬碎并搅拌</span><span> C</span><span>．把糖块咬碎</span><span> D</span><span>． 用舌头翻动搅拌</span><br><br><span>14、（ ）放入水中后，会沉到水底。 </span><br><br><span>A、食用油 B、胶水 C、酱油</span><br><br><span>15、100毫升水中大约能溶解（ ）克食盐。 </span><br><br><span>A、25 B、50 C、36 </span><br><br><span>16、</span><span>石棉网的主要作用是（ ） </span><br><br><span>A．加热得更快。 B．不让蒸发皿底部变黑。 C．让蒸发皿均匀受热。</span><br><br><span>17、我们通常利用酒精灯火焰的（ ）给物体加热。 </span><br><br><span>A、外焰 B、内焰 C、焰心</span><span> </span><br><br><span>18、27℃读作（ ） </span><br><br><span>A、摄氏二十七度 B、二十七摄氏度 C、二十七度</span><br><br><span>19、酒精在水中溶解后，会分布在水的（ ） </span><br><br><span>A．上部。 B．下部。 C．各个地方</span><br><br><span style=" font-weight:bold; ">四、我会思考</span><span style=" font-weight:bold; ">（7</span><span style=" font-weight:bold; ">分</span><span style=" font-weight:bold; ">）</span><br><br><span>1、在完成“50毫升水里可以溶解多少食盐？”后，你认为食盐在水中溶解的多少与那些因素有关？ （3分）</span><br><br><span>2、食盐能溶解于水，请根据你做过的实验结果判断：它能无限地溶解在一定的水</span><span>中吗？（4分）</span><br><br><span style=" font-weight:bold; ">五、我会操作（11分）</span><span style=" font-weight:bold; "></span><br><br><span>1、根据“一天的气温记录表”，画出气温变化折线图，并回答后面的问题。（7分）</span><br><table><tbody><tr style="height:; "><td style=" border-left: solid ; mso-border-left-alt: solid ; border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>时间</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>6时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>8时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>10时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>12时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>14时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>16时</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top: solid ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>18时</span><br></td></tr><tr style="height:; "><td style=" border-left: solid ; mso-border-left-alt: solid ; border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>气温℃</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>15</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>16</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>18</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>20</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>22</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>20</span><br></td><td style=" padding: border-right: solid ; mso-border-right-alt: solid ; border-top:none; ; mso-border-top-alt: solid ; border-bottom: solid ; mso-border-bottom-alt: solid ; "><br><span>18</span><br></td></tr></tbody></table><br><span>气温（℃）</span><div><br></div><div><span></span><img src="//www.szxuexiao.com/uploadimages/2012/1108/2012118144524.jpg?m=0.18586595472879708"><br><span>你从气温变化折线图中获得了什么信息？（4分）</span><br></div><div><span><br></span></div><div><span><br></span></div>
四年级上