Brownian motion and thermal energy transfer

Which key term describe the ransom movement of particles? 分子的无规则运动

• 绝对零度 Absolute zero degree

• Brownian motion 布朗运动

• Osmosis 渗透

• None of above

State the way the thermal energy ( 热能） is transferred?

• Conduction 传导

• Convection （对流）

• Radiation (辐射）

• none of above

Why wearing fur coat （毛衣）make us feel warm??

• To avoid the sun radiation to warm our body

• because air trapped inside the coat is a poor heat conductor( 热的不良导体）

• because air trapped inside the coat is a good heat conductor（热的良导体）

As the balloon's size becomes bigger when it rises to higher altitudes （飞到更高) , why

• As the atmospheric pressure increase at high altitudes, the balloon's size increases （高的地方大气压强增加，气球的体积增加）

• As the atmospheric pressure decreases at high altitudes, the balloon's size decreases （高的地方大气压强减少，气球的体积增加）

哪一个特质是防止热对流出去？

• 银色的内壁

• 封条

• 封条和真空层

• 塑料盖