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Worksheets科学
Total questions: 33
Worksheet time: 17mins
什么是力？
What is the meaning of force?
拉力施加在物体上
The pulling effect of an object
推力施加在物体上
The pushing effect of an object
推力和拉里施加在物体上
The pulling and pushing effect of an object
物体的移动而产生一种力量
哪项显示活动涉及推力？
Which of the following activities involves a pushing force?
上图显示一个男人正在进行活动。
Diagram above shows a man carrying out an activity.
什么力涉及这个活动？
What is the force involved in this activity?
推力 Pulling force
拉力 Pushing force
地心引力 Gravity force
压缩力 Compressing force
哪项的活动涉及拉力和推力？
Which of the following activities involves pushing and pulling forces?
打排球 Playing volleyball
放风筝 Flying a kite
推轮椅 Pushing a wheelchair
为自行车的轮胎填气 Pumping bicycle tyres
上图显示 球员在踢球。
Diagram above shows a player is kicking a ball.
当球被踢后， 球涉及什么力使球移动？、
What makes the ball move after being kicked?
脚力 Leg force
推力 Pushing force
拉力 Pulling force
摩擦力 Frictional force
下列哪项活动涉及力能改变物体的形状？
Which of the following actions of force causes a change in shape?
在操场骑自行车 Cycling in the field
球在地板上滚动 Rolling a ball on the floor
划船 Rowing a boat
吹气球 Blowing a balloon
如果一件物体涉及力，物体将是什么情况？
What will happen if an object is acted on by a force?
物体的质量将会增加 The object will become heavier
物体的质量将会减少 The object will become lighter
物体的速度将会减少 The object will move slowly
物体 的颜色会改变 The object will change colour
下列哪项活动显示力能改变物体的形状？
Which of the following shows that a force can change the shape of an object?
上图显示球在移动。
Diagram above shows that a ball is moving.
如果球员从相反的方向踢那个球， 球将是什么情况？
What will happen if a player kicks the ball form the opposite direction?
球j将会静止 The ball will stop
球将会改变形状 The ball will change its shape
球将会慢慢地移动 The ball will move slowly
球将会改变移动的方向
The ball will change its direction of movement
什么是摩擦力？
What is the meant by frictional force?
一种力涉及阻碍物体的移动
An effort to resist movement
一种力涉及改变物体
A force to change an object
一种力涉及当两个物体的表面互相接触时所产生的阻碍物体移动
The force produced when two surfaces are in contact with each other
推力和拉力施加在物体上
Pulling and pushing that is applied on an object
下列哪项是说明摩擦力的例子？
Which of the following examples explains the meaning of frictional force?
铝罐被挤压后而变成扁铝罐
An aluminium can is dented after being squeezed
自行车的踩踏板被踏得很快
A pedaled bicycle moves faster
一个盒子在草地上被拉着很难移动
A box that is pushed on the grass is difficult to move
一个球当被踢时而改变移动的方向
A rolling ball changes its direction when kicked
实验里， 一辆玩具车在不同的表面上行走。 哪一种表面能使玩具车停止最慢？
In an investigation , a toy car is pushed on different surfaces. Which surface causes the toy car to stop the latest?
玻璃表面 Glass surface
石灰表面 Cement surface
草地表面 Grass surface
地毯表面 Carpeted surface
哪项不是影响摩擦力的因素？
Which of the following do not affect the frictional force?
物体的形状 The shape of object
物体的质量 The mass of object
粗糙的表面 The roughness of surface
干的表面 The dry of surface
一组学生在进行实验。 他们在四种不同表面上滚动玻璃弹珠。 图上显示实验的结果。
A group of pupils carried out an investigation by rolling a marble on four different surfaces. Diagram above shew the results of the investigation.
哪项是 表面 R, S 和 T ？
What surfaces are R, S and T ?
R - 马尼拉卡Manila card S - 砂纸 Sandpaper
T - 玻璃Glass
R - 砂纸 Sandpaper S - 马尼拉卡Manila card
T - 玻璃Glass
R - 砂纸 Sandpaper S - 玻璃 Glass
T - 马尼拉卡 Manila card
R - 玻璃 Glass S - 砂纸 Sandpaper
T - 马尼拉卡 Manila card
物体的表面越 ， 所产生的摩擦力越 。
A surface produces frictional force
粗糙 rough , 小 less
粗糙 rough , 大 more
光滑 smooth, 大 more
光滑 smooth , 没有 non
哪项活动显示摩擦力的益处？
Which of the following activities shows an advantages of frictional force?
鞋子底部的纹路磨损 Wearing out the tread on shoe soles
磨刀 Sharpening a knife
使物体难以移动 Slowing down movements
笔尖变钝 Making a pencil blunt
图上显示工人在推盒子而面对困难。
Diagram above shows a worker is having a problem in pushing a box.
下列哪项说明是最容易的方法来推动盒子？
Which of the following is the easiest way to push the box?
用绳子来拉动盒子
Pull the box by using a string
撒一些沙在地上的表面
Scatter some sand on the surface of the floor
撒一些盐在地上的表面
Scatter some salt on the surface of the floor
放滚杠在盒子下面
Put the rollers under the box
上图显示门的合页
Diagram above shows a door hinge.
下列哪项可以帮们的合页减少摩擦力？
Which of the following can reduce the friction at the door hinge?
水 water
轮子 Wheel
润滑油 Oil
爽身粉 Talcum powder
什么是生物之间的相互关系？
生物之间的竞争关系
动物之间的共生关系
动物之间的竞争关系和共生关系
生物之间的竞争关系和共生关系
上图显示一种动物。以下哪种动物的生活方式与它相同？
火烈鸟
蟒蛇
啄木鸟
松鼠
动物P是独居动物。它只有在交配季节才会与配偶在一起。
哪项最有可能是动物P？
大象
猴子
乌鸦
老虎
两种动物共同生活的情况下，双方都获得好处。
下列哪些动物不符合这个说明？
上图显示动物已经面临绝种.
Diagram above shows an animal species which is already extinct.
为什么这动物会面临绝活？
Why is this animal extinct?
遭人类大量捕杀已获取其肉和皮
Hunted by humans for their skin and meat
成为其他动物的食物
Hunted by other animals for food
动物互相残杀而绝种
Fought among themselves until they became extinct
遭天灾如大水灾威胁
Destroyed by natural disaster such as big floods
下面哪项不是濒临绝种的植物？
Which of the following plants is not endangered plant species?
以下哪项动物已经面临绝种了？
Which of the following animals is already extinct?
犀鸟 Hornbill
熊猫 Panda
拟斑马 Quagga
人猿 Orang utan
下面哪项是濒临绝种的动物？
Which of the following animals is endangered animal?
渡渡鸟 Dodo bird
猛犸 Mammoth
儒艮 Dugong
恐龙 Dinosaur
上图显示猪笼草。 Diagram above shows a pitcher plant,
哪项因素使到猪笼草面对濒临绝种？
What is the factor that causes the pitcher plant to be at risk of extinction ?
旱灾 Drought
空气污染 Air pollution
破坏栖息地 Destruction of habitat
植物的竞争 Competition among plants
哪项显示不是威胁动物和植物濒临绝种的因素？
Which of the following is not a factor that threatens animals and plants?
毫无节制地伐木 Uncontrolled logging activities
废油倒入海里 Oil spills in the ocean
天灾如水灾 Natural disaster suchj as floods
动物之间互相残杀 Animals hunt other animals for foods
图上显示海边的红树林。
Diagram above shows mangroves trees。
哪项显示不是种红树林的益处？
Which of the following is not the advantage of planting mangroves trees?
美化海边 Beautify the seaside
动物的栖息、繁殖和生长地方
The habitat of the animals to live, reproduce and grow up
净化海水 To filter the sea water
抵御风浪
To protect shorelines from damaging storm and waves
哪项说明是复育的方法？
Which of the following is a conservation measure?
杜绝非法捕杀动物
Banning wildlife hunting
取缔非法捕杀动物的猎人
Punishing poachers who hunt wildlife
收集海龟蛋来孵化 Collecting turtle eggs for hatching
设立更多的动物园 Setting up more zoos
哪项是保护的意义？
What is meant by preservation?
维护动物和植物原有的生态环境
Maintaining the original state of animals and plants
照顾动物和植物，以便它们健康
Taking care of animals and plants that they will be healthy
把动物和植物搬到另一个比较好的环境
Keeping animals and plants in a better place
把动物和植物放在一个地区
Keeping animals and plants in an area.
下列哪项不是保护和复育动物和植物的方法？
Which is the following is not the step preservation and conservation of animals and plants?
设立森林保护区 Setting up forest reserves
严格执行法令 Enforcement of laws
植树造林 Replanting
开发森立 deforestation
哪项不是保护和复育的重要性？
Which of the following is not the importance of preservation and conservation?
动、植物的生存维护自然界的平衡
Animals and plants maintain a balanced ecosystem
植物供给动物和植物栖息地
Plants provide shelter for animals and plants
人类可以在森林寻找更多的天然资源
Humans can search many natural resources at the forest
植物供给人类和动物氧气
Plants provide oxygen needed by humans and animals to breathe
