What is the difference between sun screen & sun block

[newer]

Does anyone know the difference between sun screen and sun block?

 

[nishang]

SAME

 

[pinkbubble]

印象中两个是有区别的。

sunblock 是物理防晒，就是把紫外线反射出去。
而sunscreen 是有化学物质把紫外线吸收。

大概是这样。

 

[newer]

Thank you!
Which one is good?