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Worksheets六年级科学(七、速度,八、食物保存,九、废物)
Total questions: 25
Worksheet time: 26mins
什么是速度?
What is the definition of speed?
阻碍物体移动的力
The force that hinders the movement of object.
两个点之间的距离
Distance between two points.
物体移动的快慢程度
How fast an object is moving.
物体所占据空间的大小
The size of the space occupied by the object.
~ 游100米蝶泳
~100 meter butterfly stroke
以下哪个速度的单位适合用在以上的活动?
Which of the following speed unit is suitable for the activity above?
公里/小时(km/h)
米/秒 (m/s)
厘米/秒 (cm/s)
~ 行驶的单轨列车
~Moving monorail
以下哪个速度的单位适合用在以上的活动?
Which of the following speed unit is suitable for the activity above?
公里/小时(km/h)
米/秒 (m/s)
厘米/秒 (cm/s)
~ 爬行的毛虫
~Crawling caterpillar
以下哪个速度的单位适合用在以上的活动?
Which of the following speed unit is suitable for the activity above?
公里/小时(km/h)
米/秒 (m/s)
厘米/秒 (cm/s)
下列哪项活动没有速度?
Which of the following activities not involving speed?
走路的行人 Pedestrian walking
正在飞行的小鸟 Bird flying
站立的小孩 Kid standing
在海上航行的轮船 Ship sailing on the sea
下列哪项有关速度的说明是正确的?
Which of the statements about speed is correct?
全部的物体都有速度。
All objects have speed.
静止的物体也有速度。
A static object have speed.
物体移动的越慢,抵达目的地所需的时间越长。
The slower an object moving, the longer time needed for an object to arrive it destination.
物体移动的越快,抵达目的地所需的时间越长。
The faster an object moving, the longer time needed for an object to arrive it destination.
一位司机的驾驶速度是 80km/h ( 公里/ 小时)
A driver is driving at a speed of 80 km/ h.
当司机看到在路旁的交通标志如上图显示时,司机应该怎么做?
What should the driver do when he saw the road sign shown in diagram above?
减少速度
Reduce the speed
保持速度
Maintain the speed
增加速度
Increase the speed
把车停泊在路旁
Stop his car at the roadside
李先生在 20分钟内行驶了 35 公里的距离。 计算李先生的驾驶速度。
Mr Lee takes 20 minutes to drive on distance which is 35 km away. What is the speed of his car?
85 km/h
95 km/h
105 km/h
115 km/h
下表显示四个运动员完成100米自由泳所需的时间。
Table above shows time taken of 4 swimmers to complete 100 m freestyle stroke.
根据上表,以下哪项排列是从速度最快至最慢?
Based on the table above, which of the sequence of speed below are from fastest to slowest?
W、X、Y 、Z
W、Y、Z 、X
X、Z、Y 、W
Z、X、Y 、W
上表显示 P、Q、R 和 S 汽车的行驶速度说明。
Diagram above shown the statement about the speed of car P, Q, R and S.
以下哪项线条统计图是正确的?
Which of the following graphs match the information given above ?
食物变质是由____________所引起的。
Food turns bad because of _______________.
人类
Human
动物
Animals
植物
Plants
微生物
Microorganisms
已变质的食物有以下哪些特征?
Spoilt food has which of the following characteristic ?
发霉
mouldy
颜色改变
changed colour
改变外观
changes in appearance
有异味或酸味
have unpleasant taste (bad taste)
发出难闻的臭味
have unpleasant smell (bad smell)
上图显示装罐的食物保存法。
Diagram shows a type of food preserved by canning.
什么原因导致该食物能保存得更久?
What causes the food to last longer?
罐子里没有空气
No air in the can
罐子里没有阳光
No light in the can
罐子里保持水分
There is moisture in the can
罐子里加入了味道
There are additive flovours n the can
什么是巴氏杀菌法?
What is the meaning of "Pasteurization" ?
减少或去除食物中含有水分的过程
A process of removing water from food
长时间以烟来把食物熏至脱水的过程
A process of drying food by using smoke for a long period of time
加热并将食物密封在真空容器里的食物保存过程
A process of preserving food by heating and sealing it in an airtight container
在限定的时间内将食物加热至某个的温度并急速冷却的过程
A process of heating food to a certain temperature for a period of time followed by rapid cooling
上图显示两种食物。
Diagram shows two types of food.
以下哪一项食物保存法最适合保存以上食物。
Which of the following methods is the most suitable way to preserve the food?
干藏
Drying
冷藏
Cooling
腌渍
Pickling
冷冻
Freezing
这是一种保存食物的方法。
Diagram shows a method of food preservation.
醋的作用是什么?
What is the of vineger?
增加食物的甜味
added the sweetness of foods
保持食物的色泽
Maintain the colour of foods
保留食物的原味
Keep the food original taste
压制微生物的生长
Prevents the growth of microorganism
图片显示罐头食品。
Diagram shows can food.
哪项是上述保存技术的重要性?
Which of the following statement is the important of preservation method above?
吸引人们购买
Attract people to buy
保持食物的新鲜度
Maintain the freshness of food
延长食物的使用期限
Extend the food shelf life
增加食物的营养价值
Increase the nutrition of food
误吃了变质的食物,会有什么后果?
呕吐
晕眩
腹痛
腹泻
微生物需要水和空气才能生存。
下面哪项食物保存法能使微生物接触不到空气和水,而达到延长食物保存期的目的?
上蜡
熏制
巴氏杀菌法
装罐和装瓶
紫菱不小心喝了一些未经煮沸的水,结果吐泻了整天。为什么我们一定要喝煮沸了的水?
微生物在100摄氏度都会死亡
微生物在100摄氏度时都难以繁殖
微生物在100摄氏度时都难以生长
微生物在100摄氏度时都变得不活跃
上图显示用餐后的食物残渣。
Diagram shows food waste scattered on a table.
哪项是最好的降解食物残渣的方法?
Which is the best way to reuse the food waste?
掩埋食物残渣
Bury the food waste
焚烧食物残渣
Burn the food waste
丢进垃圾桶里
Throw into the dustbin
将它用作堆肥的原材料
Make it as a basic source for compost fertiliser
上图显示妥善处理废物的方法。
Diagram shows the correct way to disposed of a type of waste.
如果我们没有妥善处理这项废物,将会造成什么后果?
What will happen if the waste is disposed of in an improper way?
造成传染病
Causes contagious diseases to humans
成为害虫繁殖的地方
Becomes a breeding place for pests
危害生活在水里的动植物
Harms aquatic animals and plants
造成附近的地区发生水灾
Causes flash floods in nearby areas.
以下哪项不是废物的种类?
纸
空气
金属
有毒废料
排泄物和排遗物
以下哪些是可生物降解的废物?
布
纸板
金属制品
塑料制品
树叶和树枝
露天焚烧废物会导致___________, 吸入空气中所含的尘粒对人们的健康有害。
水源污染
空气污染
土地污染
形成酸雨
