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C3 Revision Forces and Senses
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The __________ something is, the greater its gravitational force. 物体越 __________，其引力就越大。
Bigge r大。
What is the force that makes things have weight called? 使物体具有重量的力叫什么？
 
Gravity .重力。
 
Friction. 摩擦。
Name where we use the force of friction to slow things down. 说出我们利用摩擦力来减慢物体速度的地方。
Own answer.
Is gravity stronger on Earth or The Moon? 地球和月球的引力哪个更强？
 
The Earth. 地球。
 
The Moon. 月亮。
When 2 moving objects hit each other the opposite forces can make the objects ...当两个移动的物体相互撞击时，相反的力量会使物体……
 
Change direction. 改变方向。
 
Explode. 爆炸。
When does friction happen? 摩擦何时发生？
 
When 2 surfaces rub together. 当两个表面相互摩擦时。
 
When 2 objects travel at different speeds. 当两个物体以不同的速度行进时。
Which surface has the most friction? 哪个表面的摩擦力最大？
 
Soil 土壤。
 
Ice. 冰。
Which force slows moving things down. 哪种力量可以减缓物体的运动速度？
 
Friction.摩擦。
 
Gravity 重力
What does friction do? 摩擦力起什么作用？
 
Slows things down.使速度减慢。
 
Speeds things up 加快速度。
Which direction does gravity pull towards?重力会拉向哪个方向？
 
The Earth.地球。
 
The Moon. 月亮。
 
The Sun. 太阳。
Which force makes things have weight? 哪种力使物体具有重量？
 
Gravity. 重力。
 
Push. 推。
 
Pull. 拉。
 
Friction.摩擦。
An astronaught on the Moon weighs...月球上的宇航员体重为...
 
Less. 较少的
 
More. 更多的
 
Same. 相同的
Mass is measured in ...质量以...来测量。
 
Kilograms and grams. 公斤和克。
 
Stones. 石头。
 
Newtons.牛顿。
Weight is a force and it is measured in ...重量是一种力，它以...来衡量。
 
Newtons. 牛顿
 
Einsteins 爱因斯坦
 
Hawkings.霍金斯。
A forcemeter is also called ...
 
A spring balance.
 
Scales.
Which instrument do we measure force with? 我们用哪种仪器来测量力？
 
Forcemeter.力计。
 
Thermometer.温度计。
 
Kilometer. 公里。
Which force does a butterfly use to fly? 蝴蝶用什么力量来飞翔？
 
Push. 推
 
Pull. 拉。
 
Friction. .摩擦。
How can we show the direction in which a force is acting? 我们如何显示力的作用方向？
 
Use arrows.使用箭。
 
Use a highlighter pen.使用荧光笔。
Give an example of using the pull force.举一个利用拉力的例子。
Own answer.
Give an example of using the push force.举一个使用推力的例子。
Own answer.
Name 3 forces.说出 3 种力量。
Push, Pull, Friction 推、拉、摩擦。


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