Wastewater story. Science CBSE, Class 7: lessons, tests, tasks.

1.	Water as our lifeline and wastewater
2.	Sewage, sewers and sewerage
3.	Wastewater treatment plant: Physical and biological processes involved
4.	Wastewater treatment plant: Chemical process
5.	The need for us to become an active citizen
6.	Housekeeping practices that are to be adopted
7.	Importance of sanitation and cause of diseases
8.	Alternative methods of disposing sewage

1.	Waste water Difficulty: easy	2
2.	Organic and inorganic impurities Difficulty: easy	2
3.	Removal of solids from sewage Difficulty: easy	2
4.	Housekeeping practices Difficulty: easy	2
5.	Sewage disposal Difficulty: easy	2
6.	Removal of suspended soilds and suspended sludge Difficulty: medium	4
7.	Sewage and its components Difficulty: medium	4
8.	Parts of WWTP Difficulty: medium	4
9.	House keeping and sanitation Difficulty: medium	3
10.	Waste water and sewage Difficulty: medium	4
11.	Physical , biological and chemical processes in WWTP Difficulty: hard	6
12.	Sewage and sanitation Difficulty: hard	6

1.	Training test 1 Difficulty: medium	8
2.	Training test 2 Difficulty: medium	8

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Methodical recommendation

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