Problem solving questions

PROBLEM SOLVING

QUES 1:Study the table given and answer the following questions.

How much pollution it can live in

Organism	None	Little	Some	Lots
May fly larva	ü
Stone fly larva	ü
Caddis fly larva	ü	ü
Water louse	ü	ü	ü
Sludge worm	ü	ü	ü	ü
Blanket weed			ü	ü

 

 a) Which organism can tolerate maximum pollution?

1) May fly larva                                3) Water louse

2)Caddis fly larva                            4)Blanket weed

b)Presence of specific organisms in streams guide us

1)Pollution in water                       3)Colour of water

2)Sound of water                            4)Utility of water

C)The source of pollution in water cannot be-

1)Industrial waste                           3)Bathing of animals

2)Smoke                                            4)Using fertilizers in soil

QUES 2:Amrita Devi Bishroi  sacrificed her life in saving the Khejari forests near Jodhpur in Rajasthan. What do you infer from this incident and what value of Amrita Devi is highlighted through this anecdote.

ANS: 1)A wise and mature person who has concern for nature can make such a great change in society. Therefore never doubt a group of commited  people cannot make a difference. It is actually they who have I made it.

2) The sacrificing nature and care for environment. 

QUES 3): The sun’s energy can be used to make electricity with solar cells. You may have a solar powered watch or calculation. There is a solar car launched in the market which just uses solar energy.

a)  Which equipment will the car need to change solar energy into movement?

b) What problems are there in using this type of energy?

c)   Where else are solar cells used?

QUES 4): Ramu lives in Chamba village and stopped people of his village to kill the frogs coming out during rainy season .Do you justify this act? Give consequences otherwise would happen to environment and us?

ANS i) Number of insects would increase.

         ii) Crops would be affected.

          iii) Lots of mosquitoes & insects cause problems              

                 to us.

QUES 5) Involvement of local people in embarking upon any plan related to environment would go a long way  in making it go successful ,which values of our personality should be sharpened to make such  decisions .

ANS i) Accomodation and cooperation

        ii) Respect for Native and fellow citizen.

         iii) Care for Environment and fellow countrymen.