Science 1 Marks Question

Trisha has seen huge garbage dumps outside the school campus which are not being regularly disposed off by municipality of the area. She discussed the problem with her biology teacher and decided to organise a rally to spread awareness among local people. Next day she delivered this information in the assembly and convinced the school mates to join her. She also explained them about the importance of sanitation at public places which she had recently studied in biology.
(i) In your views, who is responsible to maintain sanitation at public places?
(ii) What would happen, if all the wastes produced at public places are not disposed off regularly?

One day Sachin had gone to his uncle who lives in a village. He saw there a large number of people defecate in an open area because proper toilet facilities are not there. He wondered about the groundwater contamination, as he studied in his class that this act may cause water-borne diseases. He convinced village people to make toilets in order to avoid such an out break of water-borne diseases.
(i) Name two water-borne diseases.
(ii) What values are shown by Sachin?

Visit a village with your parents. Find out the sewage disposal system available there. Compare it with sewage disposal system available in the cities.

Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.

Name two inorganic impurities present in sewage.

A vast number of our people are still without sewerage facilities. Where do they relieve themselves?

Do not add to the load of WWTP. Paheli wonders how?

Did chlorine have an odour? Was it worse than that of the wastewater?

Did chlorine remove the colour?

What was removed by the sand filter?

Did aeration change the odour?

What changes did you observe in the appearance of the liquid after aeration?

In case you do not have a sewerage system in your locality, find out how sewage is being disposed off?

Have you ever thought where the wastewater goes and what happens to it?

Typhoid and cholera are water-borne disease and caused by Salmonella paratyphi and Vibrio cholerae, respectively. Find out causative agent for meningitis and hepatitis, which are also water-borne diseases.

Sanitation can be improved. Explain, what steps should be taken to improve it?

Eucalyptus trees are planted along sewage ponds. Give reason.

Name two things that are formed from sludge and are extracted during the treatment of sewage.

Mention the use of dried sludge.

Name the three processes involved in the treatment of wastewater.

Explain sewers and sewage.

Sewage contains some organic impurities in it. Name them.

Protozoa is causative organism of which waterborne disease?

Mention the common process of cleaning of wastewater.

Mention the period proclaimed as the international decade for action on water for life.

World Water Day is celebrated on __________.

What is wastewater released from homes commonly known as?

The used water should not be wasted. Do you agree? Justify.

Suggest two alternative arrangements for sewage disposal where there is no sewerage system.