教科版（2017秋）四年级下册科学第一单元植物的生长变化测试卷（含答案）
文档属性
| 名称 | 教科版（2017秋）四年级下册科学第一单元植物的生长变化测试卷（含答案） |  | |
| 格式 | zip | ||
| 文件大小 | 353.3KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 教科版（2017秋） | ||
| 科目 | 科学 | ||
| 更新时间 | 2021-04-12 17:00:36 | ||
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文档简介
2020-2021学年度下学期四年级科学试卷
题号
一
二
三
四
五
六
总分
得分
一、填空题。（每空1分，共10分）
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1.???绿色开花植物几乎都是从____________开始新生命的。
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2.???选种要挑选____________的、____________的种子。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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3.???种子萌发先长____________，再长____________；植物的根总是向____________生长的。
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4.???花萼、花瓣、雄蕊、雌蕊四部分完全具备的花叫____________，缺少其中一部分或几部分的花叫____________。
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5.???凤仙花的叶具有____________及____________的作用。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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二、判断题。（每题2分，共20分）
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1.所有的植物都是用种子繁殖后代的。（???
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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2.???尽管种子的外部形态和内部结构有所不同，但它们都有种皮和胚。（???
）
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3.???观察一朵凤仙花，我们可以直接用手把它的各部分撕下来。（???
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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4.???凤仙花种子发芽时先长出来的是根。(????
)
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5.???无论种子怎么摆放，它的根总是向下生长的。（????
）
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6.???植物的茎只具有支撑植物的作用。(?????
)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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7.???“无心插柳柳成荫"，是利用柳树的茎来繁殖的。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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8.???凤仙花有许多果实，成熟时会自动爆裂，把种子弹射出去。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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9.???既有雄蕊、又有雌蕊的花是两性花,南瓜花就是两性花。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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10.植物生长发育所需要的养料都是农民伯伯给予的。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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三、选择题。（每题2分，共30分）
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1.下列各种工具中,可以帮助我们把风仙花的种子看得更加清楚的是(??
)。
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A.放大镜???????????
B.镜子????????????
C.近视眼镜
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2.种子萌发需要的外界条件是（?????
）。?
A.阳光、温度、水分?????
B.水分、空气、土壤?????
C.水分、空气、温度
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3.蚕豆种子中发育有成茎和叶的结构是(?????
)。
A.子叶????????????
B.胚芽????????????
C.胚根
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4.蚕豆种子的子叶俗称“豆瓣”，它的于叶的数最为（????
）。
A.1个?????????B.2个????????
C.3个
5.凤仙花般在春季播种,开始生长，到了(?????
)会开花。
A.夏季????????????
B.秋季????????????
C.冬季
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6.植物叶片交叉生长，伸向四面八方,主要是为了(?????
)。
A.保持植物身体的平衡
B.能最大限度地吸收太阳光
C.长得匀称漂亮
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7.植物的茎能(?????
)将根吸收的水分和无机盐运输到植物身体的各个部分。
A.从左向右?????????
B.从上向下???????
C.从下向上
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8.农民伯伯将蜜蜂引入草莓大棚中,让蜜蜂在草莓花丛中飞舞，主要目的是(?
)。
A.获取蜂蜜?????????
B.供人欣赏????????
C.传粉
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9.凤仙花的果实是(?????
)的。
A.纺锤形???????????
B.球形????????????
C.圆柱形
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10.下列植物的花属于不完全花的是(?????
)。
A.南瓜花???????????
B.油菜花???????????
C.桃花
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11.根据下列植物果实或种子具有的特点推测,利用风来传播种子的是(?????
)。
A.果实在成熟时会突然爆裂
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B.种子轻，带翅或绒毛
C.果实有小刺或多肉好吃
12.凤仙花的果实是由(?????
)发育而来的。
A.花?????????B.茎??????????
C.叶
13.每年的4月中旬,大街小巷经常会看到柳絮漫天飞舞的情景。柳絮是柳树
的种子,它传播种子的方式是（?????
）。
A.风力传播????????
B.水力传播???????????
C.弹力传播
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14.绿色开花植物的生长一般都要经历一定的生命周期，即(?????
)。
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A.种子萌发、生长发育、开花结果、枯萎死亡
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B.种子萌发、生长发育、枯萎死亡
C.种子萌发、繁殖、枯萎死亡
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15.小明不小心将蚕豆种子的胚根损伤了，如果小明给这粒蚕豆种子提供适宜的环境那么这粒蚕豆种子（?????
）。
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A.不能发芽??????B.能正常发芽?
C.能发芽，但是发芽的速度很慢
四、连线题。（共8分）
1.???将下列植物的茎与其对应的分类用线连接起来。（4分）
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????
?红薯的茎???????????????????直立茎
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??????凤仙花的茎?????????????????缠绕茎
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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\t
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??????牵牛的茎???????????????????攀缘茎
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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??????葡萄的茎???????????????????匍匐茎
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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2.???将下列植物的器官与其作用用线连接起来。（4分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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??????根?????????????????????????支持植物、运输水分和养料
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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??????茎?????????????????????????吸收阳光制造养料、蒸腾水分
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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??????叶???????
?????????????????发育成果实和种子
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
\l
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??????花?????????????????????????吸收水分、固定植物
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
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五、探究题。（共26分）
1.我们做过“研究植物的根的作用”的实验，你有信心接受以下挑战吗??(6分)
（1）在实验中，我们在水面上滴些植物油是为了(?????)。
A.让根吸收?????
B.防止水蒸发??????
C.为了美观
（2）为了更清楚地观察到水位是否发生变化，我们可以(?????
)。
A.在瓶子上做好记号?????
B.事先测量水的质量?????
C.大概估计一下
（3）第二天我们明显观察到水位下降了,这一现象说明(?????
)。
A.水蒸发了?????
B.水被根吸收了????
C.试管漏水
2.突如其来的新冠肺炎疫情，成为大家需要共同关注的社会问题。2020年2月17日，温州某地番茄种植户自发向湖北武汉捐赠了32吨番茄，为抗疫献出一份力量。番茄富含营养，深受大家的喜爱。小明利用所学知识进行以下的探究。(14分)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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生长时间/周
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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1
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
"https:?/??/?mp.weixin.?/?_blank?)
2
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
"https:?/??/?mp.weixin.?/?_blank?)
3
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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4
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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5
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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6
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
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7
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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8
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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9
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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10
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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11
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
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12
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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植株高度/厘米
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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2
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
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5
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
"https:?/??/?mp.weixin.?/?_blank?)
14
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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24
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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34
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
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41
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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\t
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47
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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52
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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56
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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59
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
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61
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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61
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（1）小明对番茄花进行解剖,解剖出花瓣、花萼雌蕊、雄蕊四个部分。他可以(?????
)解剖番茄花。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.直接用手???????
B.使用镊子????????
C.直接用手或使用镊子
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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（2）根据分析，可以判断番茄花是(?????
)。?(多选)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.完全花????
B.不完全花???
C.单性花????
D.两性花
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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（3）你按从外到内的顺序,对番茄花的四个部分进行排序:_______________。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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（4）小明还了解到番茄种植户为了提高番茄产量会进行人工授粉,使___________上的花粉落到____________的上端。只有完成传粉,植
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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"https:?/??/?mp.weixin.?/?_blank?)物的花才能发育成____________。
（5）番茄果实汁多味美，小明认为番茄种子最有可能是依靠(?????
)到远方的。
A.动物传播?????
B.水力传播?
????C.风力传播?????
D.弹力传播
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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3.小明切下一段新鲜的带叶的茎，向水中滴入红色色素并搅拌均匀,再将茎的下端浸入水中。(6分)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（1）小明向水中滴入红色色素是为了(?????)。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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A.为茎和叶提供营养?????
B.让实验现象更明显?????
C.没有作用
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（2）一段时间后,小明将这段茎横切，她发现（?????
）。
A.横切面全被染红了??B.横切面的一部分被染红了??
C.横切面没有被染红
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（3）这个实验能证明植物的茎具有(?????
)作用。
A.运输水分??????????
B.支撑植物????????
??C.制造养料
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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六、简答题。（6分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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401班科学小组在种植凤仙花时，我们获得了如下数据:（6分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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请根据凤仙花植株高度变化折线图,找出凤仙花植株高度变化规律。(至少写2条)
答案
一、
1.种子
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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2.饱满?
没有受过伤
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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3.根?
茎和叶?
下
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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4.完全花?
不完全花
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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5.吸收阳光?
蒸腾水分
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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二、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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1.×2.√3.×4.√5.√6.×7.√8.√9.×10.×
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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三、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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1.A??2.C3.B4.B5.A6.B7.C
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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8.C9.A10.A11.B12.A13.A14.A15.A
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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四、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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1.
?
2.
五、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
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1.（1）B?
（2）A??
（3）B
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2.(1)B?(2)AD?(3)花萼、花瓣、雄蕊、雌蕊?
(4)雄蕊雌蕊?
果实
(5)A
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
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3.(1)B?(2)B?(3)A
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
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六、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
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(1)从第2周开始快速长高。
(2)从第11周开始高度基本不再变化。(合理即可)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
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L
S
K
教科版
名校考+练·科学
四年级（下册）
第一单元测试卷
时间：60分钟
总分100分
第3页
（共6页）
第4页
（共6页）
第1页
（共6页）
第2页
（共6页）
题号
一
二
三
四
五
六
总分
得分
一、填空题。（每空1分，共10分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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1.???绿色开花植物几乎都是从____________开始新生命的。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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2.???选种要挑选____________的、____________的种子。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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3.???种子萌发先长____________，再长____________；植物的根总是向____________生长的。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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4.???花萼、花瓣、雄蕊、雌蕊四部分完全具备的花叫____________，缺少其中一部分或几部分的花叫____________。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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5.???凤仙花的叶具有____________及____________的作用。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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二、判断题。（每题2分，共20分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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1.所有的植物都是用种子繁殖后代的。（???
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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2.???尽管种子的外部形态和内部结构有所不同，但它们都有种皮和胚。（???
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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3.???观察一朵凤仙花，我们可以直接用手把它的各部分撕下来。（???
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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4.???凤仙花种子发芽时先长出来的是根。(????
)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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5.???无论种子怎么摆放，它的根总是向下生长的。（????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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6.???植物的茎只具有支撑植物的作用。(?????
)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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7.???“无心插柳柳成荫"，是利用柳树的茎来繁殖的。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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8.???凤仙花有许多果实，成熟时会自动爆裂，把种子弹射出去。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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9.???既有雄蕊、又有雌蕊的花是两性花,南瓜花就是两性花。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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10.植物生长发育所需要的养料都是农民伯伯给予的。（?????
）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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三、选择题。（每题2分，共30分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247503925&idx=8&sn=6d8efbf090e34a18cc376fe49efa7905&chksm=e96f3765de18be73dfeab1fe6c1579e2d5d88500492fde4354d5b8d77e0bcd3a8a970be9a813&scene=21"
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1.下列各种工具中,可以帮助我们把风仙花的种子看得更加清楚的是(??
)。
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A.放大镜???????????
B.镜子????????????
C.近视眼镜
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2.种子萌发需要的外界条件是（?????
）。?
A.阳光、温度、水分?????
B.水分、空气、土壤?????
C.水分、空气、温度
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3.蚕豆种子中发育有成茎和叶的结构是(?????
)。
A.子叶????????????
B.胚芽????????????
C.胚根
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4.蚕豆种子的子叶俗称“豆瓣”，它的于叶的数最为（????
）。
A.1个?????????B.2个????????
C.3个
5.凤仙花般在春季播种,开始生长，到了(?????
)会开花。
A.夏季????????????
B.秋季????????????
C.冬季
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6.植物叶片交叉生长，伸向四面八方,主要是为了(?????
)。
A.保持植物身体的平衡
B.能最大限度地吸收太阳光
C.长得匀称漂亮
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7.植物的茎能(?????
)将根吸收的水分和无机盐运输到植物身体的各个部分。
A.从左向右?????????
B.从上向下???????
C.从下向上
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8.农民伯伯将蜜蜂引入草莓大棚中,让蜜蜂在草莓花丛中飞舞，主要目的是(?
)。
A.获取蜂蜜?????????
B.供人欣赏????????
C.传粉
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=7&sn=67f4118916dbef23f049b287762b2445&chksm=e96f37d5de18bec3f3c8db133cbb54fcc5d6ede03f40c44fae0046a4a8d0af4b1592bf18dfab&scene=21"
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9.凤仙花的果实是(?????
)的。
A.纺锤形???????????
B.球形????????????
C.圆柱形
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10.下列植物的花属于不完全花的是(?????
)。
A.南瓜花???????????
B.油菜花???????????
C.桃花
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11.根据下列植物果实或种子具有的特点推测,利用风来传播种子的是(?????
)。
A.果实在成熟时会突然爆裂
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B.种子轻，带翅或绒毛
C.果实有小刺或多肉好吃
12.凤仙花的果实是由(?????
)发育而来的。
A.花?????????B.茎??????????
C.叶
13.每年的4月中旬,大街小巷经常会看到柳絮漫天飞舞的情景。柳絮是柳树
的种子,它传播种子的方式是（?????
）。
A.风力传播????????
B.水力传播???????????
C.弹力传播
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14.绿色开花植物的生长一般都要经历一定的生命周期，即(?????
)。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.种子萌发、生长发育、开花结果、枯萎死亡
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B.种子萌发、生长发育、枯萎死亡
C.种子萌发、繁殖、枯萎死亡
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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15.小明不小心将蚕豆种子的胚根损伤了，如果小明给这粒蚕豆种子提供适宜的环境那么这粒蚕豆种子（?????
）。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.不能发芽??????B.能正常发芽?
C.能发芽，但是发芽的速度很慢
四、连线题。（共8分）
1.???将下列植物的茎与其对应的分类用线连接起来。（4分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
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????
?红薯的茎???????????????????直立茎
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??????凤仙花的茎?????????????????缠绕茎
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??????牵牛的茎???????????????????攀缘茎
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??????葡萄的茎???????????????????匍匐茎
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2.???将下列植物的器官与其作用用线连接起来。（4分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504005&idx=2&sn=eec1db5922b82967861382b94438a6b3&chksm=e96f37d5de18bec34ea18aa3ff8cded3858b531d5d3b8f1088d474402df0563790147976e140&scene=21"
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??????根?????????????????????????支持植物、运输水分和养料
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??????茎?????????????????????????吸收阳光制造养料、蒸腾水分
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??????叶???????
?????????????????发育成果实和种子
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??????花?????????????????????????吸收水分、固定植物
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五、探究题。（共26分）
1.我们做过“研究植物的根的作用”的实验，你有信心接受以下挑战吗??(6分)
（1）在实验中，我们在水面上滴些植物油是为了(?????)。
A.让根吸收?????
B.防止水蒸发??????
C.为了美观
（2）为了更清楚地观察到水位是否发生变化，我们可以(?????
)。
A.在瓶子上做好记号?????
B.事先测量水的质量?????
C.大概估计一下
（3）第二天我们明显观察到水位下降了,这一现象说明(?????
)。
A.水蒸发了?????
B.水被根吸收了????
C.试管漏水
2.突如其来的新冠肺炎疫情，成为大家需要共同关注的社会问题。2020年2月17日，温州某地番茄种植户自发向湖北武汉捐赠了32吨番茄，为抗疫献出一份力量。番茄富含营养，深受大家的喜爱。小明利用所学知识进行以下的探究。(14分)
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生长时间/周
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
12
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\l
"wechat_redirect"
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"https:?/??/?mp.weixin.?/?_blank?)
植株高度/厘米
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
2
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
5
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
14
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
24
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\l
"wechat_redirect"
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34
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\l
"wechat_redirect"
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41
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\l
"wechat_redirect"
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"https:?/??/?mp.weixin.?/?_blank?)
47
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
52
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
"wechat_redirect"
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56
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
59
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
\l
"wechat_redirect"
\t
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61
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\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
61
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\l
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\t
"https:?/??/?mp.weixin.?/?_blank?)
（1）小明对番茄花进行解剖,解剖出花瓣、花萼雌蕊、雄蕊四个部分。他可以(?????
)解剖番茄花。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.直接用手???????
B.使用镊子????????
C.直接用手或使用镊子
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（2）根据分析，可以判断番茄花是(?????
)。?(多选)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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A.完全花????
B.不完全花???
C.单性花????
D.两性花
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
\l
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（3）你按从外到内的顺序,对番茄花的四个部分进行排序:_______________。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
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（4）小明还了解到番茄种植户为了提高番茄产量会进行人工授粉,使___________上的花粉落到____________的上端。只有完成传粉,植
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=3&sn=a7b3ee8478876b6597a302e5fa14f872&chksm=e96f37ecde18befab61d64c088c54755332f6ff2124bad11918c59f730c38bd8afaac0918528&scene=21"
\l
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"https:?/??/?mp.weixin.?/?_blank?)物的花才能发育成____________。
（5）番茄果实汁多味美，小明认为番茄种子最有可能是依靠(?????
)到远方的。
A.动物传播?????
B.水力传播?
????C.风力传播?????
D.弹力传播
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\l
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3.小明切下一段新鲜的带叶的茎，向水中滴入红色色素并搅拌均匀,再将茎的下端浸入水中。(6分)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（1）小明向水中滴入红色色素是为了(?????)。
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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A.为茎和叶提供营养?????
B.让实验现象更明显?????
C.没有作用
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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（2）一段时间后,小明将这段茎横切，她发现（?????
）。
A.横切面全被染红了??B.横切面的一部分被染红了??
C.横切面没有被染红
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（3）这个实验能证明植物的茎具有(?????
)作用。
A.运输水分??????????
B.支撑植物????????
??C.制造养料
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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六、简答题。（6分）
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=2&sn=c665eefd1d4ef734840097508a5424dd&chksm=e96f37ecde18befa43d183a3f77c66fa4c49b7fc576ba0ab555a0db0876043c0f8782a1a5a2f&scene=21"
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401班科学小组在种植凤仙花时，我们获得了如下数据:（6分）
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请根据凤仙花植株高度变化折线图,找出凤仙花植株高度变化规律。(至少写2条)
答案
一、
1.种子
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504206&idx=2&sn=4e0ea41792c30d60794b0873ae2541a4&chksm=e96f361ede18bf08819deddd37cf371408ee4c96b75ae73c3e3c74823efab63151a636b1d139&scene=21"
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2.饱满?
没有受过伤
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3.根?
茎和叶?
下
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4.完全花?
不完全花
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5.吸收阳光?
蒸腾水分
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二、
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1.×2.√3.×4.√5.√6.×7.√8.√9.×10.×
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三、
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1.A??2.C3.B4.B5.A6.B7.C
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8.C9.A10.A11.B12.A13.A14.A15.A
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四、
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1.
?
2.
五、
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1.（1）B?
（2）A??
（3）B
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2.(1)B?(2)AD?(3)花萼、花瓣、雄蕊、雌蕊?
(4)雄蕊雌蕊?
果实
(5)A
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"https:?/??/?mp.weixin.?/?_blank?)
3.(1)B?(2)B?(3)A
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
六、
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
(1)从第2周开始快速长高。
(2)从第11周开始高度基本不再变化。(合理即可)
(?http:?/??/?mp.weixin.?/?s?__biz=MzI0MzM5NzE4Mw==&mid=2247504060&idx=8&sn=50d86a2f0d68737743b909fa05ef8dd0&chksm=e96f37ecde18befa322503a936a7e7a77146b4dec04c3eed3da82d89dc1292abe8248cd01dc5&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
L
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教科版
名校考+练·科学
四年级（下册）
第一单元测试卷
时间：60分钟
总分100分
第3页
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第4页
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第1页
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第2页
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