CBSE Class 7 - Water and its Contamination Videos
Water Pollution
Definition-waste water, sewage, Contaminants and their types, Sewerage, Treatment of polluted water
- The substance is causing harm to living organisms through a water sale and food are called _____________
- what are water
- Name some water borne diseases
- What are the different impurities found in sewage water?
- Define sewage
- What dangers result from improper storm water drainge system in a city?
- List the ways in wastewater present in sewage is generated and the kind of contaminants present in each?
- How can contamination of drinking water occur from sewage even in a covered drainage system?
- what problem can arise due to improper drainage?
- why is cholera outbreak common after floods?
