faisalabdul16
Wot
- Joined
- Feb 16, 2014
- Messages
- 2,258
- Gender
- Male
- HSC
- 2014
Thanks for the advice! but for such a simple question worth 6 marks, as if you're not expected to mention what cfc's are? How is a marker supposed to know what they are or why they were used without you explaining?- Bold 1: Poor leading sentence. Ozone depletion is caused by various substances not only CFC's which is what you implied
- Red: Useless
- Bold 2: Poor cause and effect (I know what you're trying to say, but it's not simply that free radicals directly cause ozone depletion)
- Overall: Poor answer because you didn't really tackle what is causing ozone depletion. All you said is CFC's destroy ozone. Sure, but overall the effect could be nil since the ozone layer is always naturally regenerating. (I.e. say that the increase in usage of ozone depleting substances has resulted in the rate of ozone destruction > rate of ozone regeneration and hence the phenomena "ozone depletion")
+1 (not on mark though)
Could you explain the "not simply that free radicals directly cause ozone depletion."