I would suggest you to memorise the Facts and Explanation which match them.. It will be easier if you revise in a form of Table, or flow chart, or mind maps...
And the Explanation must really match with the Facts!! Some of the facts are already published in my postings..please check!
1. Deforestation- causes and effects
2.Greenhouse effects- causes and effects --Relate it with global warming
3. Thinning of ozone layer- causes and effect
4. Air pollution- acid rain- causes and effects
5. Eutrophication- BOD - Flow chart- Event in sequence !
6.Water pollution- BOD
7.Urbanisation
Write an ESSAY...not a Table !! Use paragraphs !
Paper 3 :
Design exp. for BOD- using methylene blue solution AND it DECOLORISE not change to colorless !
Be careful to determine the manipulated variable and the responding variable ! Read the question properly !
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