内容正文:
Unit 4 What makes things move?
第2课时 Explore
基础练
一、选词填空。
force, movement, fast, slow, speed
1.A ________ is a push or a pull.
2.The ________ of the train is very high.
3.Big force makes big ________.
4.Trains go ________ than tortoises.
5.Tortoises move ________.
二、根据首字母提示补全单词。
1.Pushing and pulling are kinds of f________.
2.A big f________ can make things move far.
3.Small force causes small m________.
4.S________ tells us how fast things move.
5.A plane moves f________ than a car.
三、读句子,选最佳答案。
( ) 1. A push ____ a kind of force.
A. is B. are C. am
( ) 2. Light things are ____ to move than heavy ones.
A. easy B. easier C. easiest
( ) 3. A big force makes a ball go ____.
A. far B. farther C. farthest
( ) 4. A train is slower ____ a plane.
A. than B. then C. that
( ) 5. A force ____ change the speed of things.
A. can B. can't C. isn't
提升练
四、连词成句(填序号)
1.①is ②A push ③force ④a (.)
___________________________________________________________________________
2.②big ③A ④makes ⑤movement ⑥force (.)
___________________________________________________________________________
3.①than ②lighter ③Things ④easier ⑤are ⑥to move (.)
___________________________________________________________________________
4.①slower ②A car ③plane ④than ⑤is (.)
___________________________________________________________________________
5.①change ②A force ③speed ④can ⑤the (.)
___________________________________________________________________________
五、根据对话情境,从方框选句子补全对话。
A: Let's talk about force and speed!
B: What is a force?
A: A push is a force. (1) ____________A. A pull is also a force.
B. It can make things move far away.
C. Light things are easier to move.
D. A plane is the fastest of all.
E. Forces can change speed.
B. What can a big force do?
A: (2) ____________
B: Why can we carry toys easily?
A: (3) ____________
B: Which moves fastest, car, train or plane?
A: (4) ____________
B: What else can forces do?
A: (5) ____________
六、问答匹配。
( ) 1. What is a force? A. Light things.
( ) 2. What can a big force do? B. A push or a pull.
( ) 3. What things are easy to move? C. It makes things go far.
( ) 4. Which is faster, train or car? D. A train.
( ) 5. What can change the speed? E. Forces.
七、英汉翻译。
1.natural force ________________________
2.movement of objects ________________________
3.速度 ________________________
4.比…… 更快 ________________________
5.A big force can change the speed of a door. ________________________
八、读一读,将下列句子排序,组成一段完整、通顺的对话。
A: What makes the ball go far?
B: A big force.
C: Is a pull a force too?
D: Yes, a push and pull are both forces.
E: Light balls move farther than heavy ones.
F: I learn a lot about forces today.
________________________________________
拓展练
九、【新情境・表文转换】阅读表格,用完整英文句子回答问题
Object
Weight
Force needed
Speed
Balloon
light
small force
fast
Stone
heavy
big force
slow
1.What force do we need to move a balloon?
________________________________________
2.Which moves slower, stone or balloon?
________________________________________
3.Can a force change the speed of things?
________________________________________
十、仿照示例写两组对比句子
示例:A plane is faster than a train.
1.train /car(更快) ________________________________________
2.tortoise /plane(更慢) ________________________________________
参考解析
基础练
基础练
一、选词填空
答案:1. force 2. speed 3. movement 4. fast 5. slow
解析:
1.force(力),推、拉都属于一种力;
2.speed(速度),用来描述交通工具快慢;
3.movement(移动),大的力会产生大幅度移动;
4.fast(快),火车比乌龟跑得更快;
5.slow(慢),乌龟移动速度很慢。
二、根据首字母提示补全单词
答案:1. force 2. force 3. movement 4. Speed 5. fast
解析:
1.push、pull 都是 force(力);
2.大 force 能让物体移动很远;
3.小的力只会产生小 movement(运动);
4.Speed(速度)表示物体运动快慢;
5.飞机比汽车跑的 fast(快)。
三、读句子,选最佳答案
答案:1.A 2.B 3.B 4.A 5.A
解析:
1.主语 a push 为单数,be 动词用 is,选 A;
2.出现 than 用形容词比较级 easier,选 B;
3.大力能让球飞得更远,far 的比较级 farther,选 B;
4.固定搭配 比较级 + than(比……),选 A;
5.can 表示 “能够”,力可以改变物体速度,选 A。
提升练
四、连词成句
1.②①④③ A push is a force.
解析:主系表句型,推力是一种力。
2.③②⑥④⑤ A big force makes movement.
解析:主谓宾,大的力产生运动。
3.③⑤②⑥① Things are easier to move.
解析:比较级句型,轻的物体更容易移动。
4.②⑤①③ A car is slower than a plane.
解析:交通工具速度对比,比较级标准句式。
5.②④⑤①③ A force can change the speed.
解析:情态动词 can + 动词原形,力能改变速度。
五、根据对话情境,从方框选句子补全对话
答案:1.A 2.B 3.C 4.D 5.E
解析:
1.前文说推力是力,补充拉力也是力,选 A;
2.问句询问大力的作用,对应让物体移动很远,选 B;
3.询问玩具容易搬运的原因,因为物体轻,选 C;
4.三种物体对比,飞机速度最快,选 D;
5.补充力的另一作用:改变速度,选 E。
六、问答匹配
答案:1.B 2.C 3.A 4.D 5.E
解析:
1.什么是力?答:推或者拉;
2.大力能做什么?答:让物体移动很远;
3.什么东西容易移动?答:轻的物体;
4.火车和汽车谁更快?答:火车;
5.什么可以改变速度?答:力。
七、英汉翻译
1.natural force — 自然力
2.movement of objects — 物体的运动
3.速度 — speed
4.比…… 更快 — faster than
5.A big force can change the speed of a door. — 大力可以改变门开关的速度。
八、句子排序
答案:C D A B E F
解析:对话逻辑:询问拉力是不是力→推拉都是力→什么让球飞得远→需要大力→轻球比重球飞得远→今天学到很多。
拓展练
九、【新情境・表文转换】阅读表格,用完整英文句子回答问题
1.We need a small force to move a balloon.
2.The stone moves slower.
3.Yes, a force can change the speed of things.
十、仿照示例写两组对比句子
示例:A plane is faster than a train.
1.A train is faster than a car.
2.A tortoise is slower than a plane.
解析:全部使用比较级 faster /slower,贴合本课时速度对比知识点,语句语法完整,冠词不缺失。
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