小学三年级科学试卷_小学三年级科学试卷建议

三年级科学下册检测试卷

8．下列用品中，能找到磁铁的是B.

1.蚕一生经过卵、幼虫、蛹、成虫四个形态

小学三年级科学试卷_小学三年级科学试卷建议

小学三年级科学试卷_小学三年级科学试卷建议

绿叶依靠阳光提供的能量，利用二氧化碳和水，能制造出养料和氧气 ，这个作用叫光合作用。

自然界的水有三种形态，水蒸气属于气态的水；露、雾属于液态的水；霜、雪、冰属于固态的水。

蚕的幼虫和成虫样子是完全不同的，这种变化叫做 完全。

当两块磁铁互相靠近时，同名磁极互相排扯 ，异名磁极互相吸引。

磁铁有2个磁极，一个叫南极，用字母s 表示；另一个叫北极，用字母N表

在自然界中，有的动物是母动物直接生小动物的（胎生）；有的动物是产卵繁殖的（卵生），请你各举出2种卵生动物、胎生动物的名称。

卵生动物鸡、鸭 胎生动物猫和狗

．蚕蛾的身体可以分为 头、胸、腹三部分。

摄氏度是温度的单位，摄氏度可以用符号℃来表示。

盛有冰块的玻璃杯外会有许多小水珠，这是玻璃杯外的空气遇冷凝结成小露珠 。

水变成水蒸气的过程叫做蒸发。水蒸气是肉眼无法看见的。

．磁用温度计测量冰水混合物（盛在烧杯里）的温度，3分钟后，烧杯里的冰还没有全部融化掉，这时温度计的读数A铁隔着木头也能吸铁

蚕的生命周期大约为B天。

A、20 B、56 C、78

．读温度计的读数时，眼睛应该B温度计的刻度。

A、俯视 B、平视 C、仰视

下列测量水温的做法中，正确的是C。

A、把整个温度计放入水中 B、把温度计拿出水面读数

C．将温度计下端浸入水中

A、0℃ B、大于0℃ C、低于0℃

5．磁铁两端只标有A、B符号，用A端去接近小磁针的S极，发现是相排斥的，那么A端是B。

A、北极 B、南极 C、N极

6．刚孵出的小蚕要放到桑叶上去，最适合使用的工具是B。

A、毛笔 B、镊子 C、筷子

7．凤仙花属于的植物B。

A、电灯 B、电茶壶 C、电话机

A、来回摩擦 B、随便摩擦 C、沿一个方向摩擦

10．零下8摄氏度可以写成B。

A、8℃ B、－8℃ C、＋8℃

11．开水沸腾时，可以看到茶壶口的上方会出现“白汽”，这是 A。

A、水蒸气 B、空气 C、小水滴

人教版鄂教版小学科学三年级下册科学第二单元测试

2．用量筒可以测量水的体积。（ ）

题：

第二题：

第三题：

第四题：

扩展资料这部分内容主要考察的是植物生长期。的知识点：

作物生长期因作物种类、品种而异，不同光、热、水等条件及其组合，不良气象条件以及不同农业技术措施等，也会引起生长期的变动。如短日照作物水稻的同一粳稻品种，在同一地点作单季稻栽培比作双季稻栽培生长期长。

同一冬小麦品种在越冬期长短不同的地点栽培，其生长期也有较大异；在低温季节比高温季节栽培生长期长；水分过多、施肥过晚能延缓营养生长期和灌浆成熟期，并在后期易出现贪青晚熟。

在干旱地区，水分条件往往决定着生长期的长短。进行正常生活周期所必需的生长期，每因植物种类而异。生长期的长短多决定着植物（尤其是树木）分布的北限。生长期越短，植物可生育的纬度和海拔高度也越高。

农业气候上以日平均温度大于6℃的持续日数为生长期日数，稳定通过该平均温度的初、终日为生长期起止日期。我国温州、浦城、吉安、桂林、兴仁一线以南及四川盆地的达县、雅安以南全年均为生长期；东北北部地区5月初这里怎么不好做作业的啊至10月初为生长期，长仅5个月。

三年级下册数学，语文，英语，科学期末试卷及

A、半年生 B、一年生 C、多年生

28 29B．玻璃珠、橡皮 C．马铃薯、塑料片

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三年级下册科学期末考试的

习作

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孩子不学好 自己动脑子！

小学三年级上册科学，谁有前几年的试题呀？

：

2010-2011学年上期三年级科学期末测试卷

一、填空题。

1．物体可以分为 、 、 三类。

2．水是一种__________、________、_________透明的液体。

3．空气可以占据 ，可以被 。

4．植物的生存需要 、 、 等。

二、判断题。（对的打“√”，错的打“×”）

1．离开了空气（或氧气）木柴不能燃烧。（

3．我们应该合理使用材料，减少对环境的破坏。（ ）

4．不同的材料在水中的沉浮是不同的。（ ）

5．水只存在于江、河及海洋中。（ ）

三、选择题（将正确的序号填在括号内）

1．下列几种纸按其吸水能力由强到弱的顺序排列正确的是（ ）

A．报纸→面巾纸→牛皮纸 B．面巾纸→报纸→牛皮纸

2．下列物体中，只有（ ）组全都会沉入水底。

A．装9．用磁铁摩擦钢针的方法可以做成磁针，正确的方法是A。满空气并密封好的玻璃瓶、装满货物的大轮船

3．黏土烧制成砖或陶瓷后，其性质（ ）

A．发生了变化 B．没有发生变化，但是黏土变得很干很干

4．用量筒测量液体读数据时，视线要与（ ）水平。A．液面 B．刻度 C．量筒

5.古代造纸术是由（ ）发明的。A．蔡伦 B．爱迪生 C．牛顿

三、简答：

1、在日常生活中那些物体是应用压缩的空气具有弹性的性质的？（至少写3种）

答：

2、请小朋友们把自己身边用水中的节水和费水的事例写在下面

（1） 节约事例：

（2） 费水事例：

三年级下册数学,语文,英语,科学期末试卷及

班级 姓名

小学数学三年级下册期末试卷

5．土分为 、 、 三种。

一、填空题 （每空1分,共15分）

1、平年的二月有（ ） 天,闰年有（ ）天.

2、十月份有（ ）个星期零（ ）天

3、平年的一、二 、三月份共有 （ ）天.

4、课外小组活动开始时间是16时 ,经过1小时20分后活动结束,活动结束时的时间是（ ）时（ ）分.

5、小明每天8时半到学校上课,11时50 分放学回家,他上午在校的时间是（ ）时 （ ）分.

6、一个商店全天的营业时间是8：00----19：00.这里的19：00是指下午（ ）点,这个商店全天营业时间是（ ）小时

7、在下面的（ ）里能填几

194×（ ）