PDF chapter test TRY NOW
Here is a crossword puzzle: Good luck!
Across:
3. Liquid waste products -
4. Solid waste extracted in sewage treatment -
6. A word related to hygiene -
8. Waste matter discharged from human body -
3. Liquid waste products -
4. Solid waste extracted in sewage treatment -
6. A word related to hygiene -
8. Waste matter discharged from human body -
Down:
1. Used water -
2. A pipe carrying sewage -
5. Micro-organisms which causes cholera -
7. A chemical to disinfect water -
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