Name 3 forces.说出 3 种力量。
Push, Pull, Friction 推、拉、摩擦。
Give an example of using the push force.举一个使用推力的例子。
Own answer.
Give an example of using the pull force.举一个利用拉力的例子。
Own answer.
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 a highlighter pen.使用荧光笔。
Use arrows.使用箭。
Which force does a butterfly use to fly? 蝴蝶用什么力量来飞翔？
Pull. 拉。
Friction. .摩擦。
Push. 推
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。
A forcemeter is also called ...
Scales.
A spring balance.
Weight is a force and it is measured in ...重量是一种力，它以...来衡量。
Einsteins 爱因斯坦
Hawkings.霍金斯。
Newtons. 牛顿
Mass is measured in ...质量以...来测量。
Stones. 石头。
Newtons.牛顿。
Kilograms and grams. 公斤和克。
An astronaught on the Moon weighs...月球上的宇航员体重为...
Same. 相同的
Less. 较少的
More. 更多的
Which force makes things have weight? 哪种力使物体具有重量？
Push. 推。
Pull. 拉。
Friction.摩擦。
Gravity. 重力。
Which direction does gravity pull towards?重力会拉向哪个方向？
The Moon. 月亮。
The Sun. 太阳。
The Earth.地球。
What does friction do? 摩擦力起什么作用？
Speeds things up 加快速度。
Slows things down.使速度减慢。
Which force slows moving things down. 哪种力量可以减缓物体的运动速度？
Gravity 重力
Friction.摩擦。
Which surface has the most friction? 哪个表面的摩擦力最大？
Soil 土壤。
Ice. 冰。
When does friction happen? 摩擦何时发生？
When 2 objects travel at different speeds. 当两个物体以不同的速度行进时。
When 2 surfaces rub together. 当两个表面相互摩擦时。
