1 MARK QUESTIONS for Class 10 NATURAL RESOURCES

SOURCES OF ENERGY

Q1. How is the slurry left in a bio-gas plant in the end, used?

Q2. Name any two elements that are used in fabricating solar cells.

Q3. What are the causes of ocean thermal energy?

Q4. What is the major problem in harnessing nuclear energy?   

Q5. List two characteristics of a good source of energy.

Q6. Mention any two limitations of using fossil fuels.

Q7. Name the two major components present in the left-over slurry of a biogas plant.

Q8. Why is a solar cooker painted black from outside?

Q9. Mention the main purpose of using a plane mirror in solar cookers.

Q.10. Mention two different ways of harnessing energy from ocean.

Q11. Write the energy conversion that takes place in hydropower plant.

Q12.  State the reason tor considering fossil fuels as non-renewable sources of energy.

Direction (Q.No. 13-17)In each of the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as

(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

(c) If Assertion is true, but Reason is false.

(d) If Assertion is false, but Reason is true.

(e) If Assertion and Reason both are false.

Q13. Assertion: Many thermal power plants are set up near coal or oil fields.

            Reason: It is more efficient to transmit electricity than to transport coal or petroleum over the same distance.

Q14. Assertion: In a wind energy farm, a number of windmills are erected over a large area.

            Reason: The energy output of a single windmill is large and can be used for commercial purposes.

Q15. Assertion: The slurry left behind is removed periodically and used as excellent manure, rich in nitrogen and phosphorous.

            Reason: The large-scale utilisation of bio-waste and sewage material provides a safe and efficient method of waste-disposal besides supplying energy and manure.

 Q16. Assertion: Our energy requirements increase with our standard of living.

             Reason: The only way to manage energy demand is to produce more energy.

Q17. Assertion: Solar cells can be used to solve energy needs of areas which are not near the source of Electricity production.

            Reason:  The use of Solar cells is not widespread because of their high cost.

Q18. Which one of the following sources of energy was most common in ancient times?

(a) Wind

(b) Wood

(c) Coal          

(d) Water

Q19. Why is bio-gas considered an excellent fuel?

(a) It burns without smoke

(b)  It leaves no residues

(c) Its heating capacity in high

(d) All of the above

Q20. Which of the following sources of energy is a conventional source of energy?

(a) Sun                                

(b) Sea

(c) Fossil fuel     

(d) Nuclear

Q21. Which of the following chemical elements is used for making solar cells?

(a) Silicon                          

(b) Aluminium

(c) Iron                       

(d) Lead

OUR ENVIRONMENT

Q1. State one problem caused by non-biodegradable wastes. 

Q2.  Which of the following materials are non-biodegradable in each of the following category?

(i)  Paper, leather, nylon, eggshell, glass

(ii)   Tea leaves, glass, glucose, cotton cloth, silver foil

(iii)   Glass, glucose, leather,  silver foil, nylon cloth

Q3. State one difference between autotrophs and heterotrophs.

Q4.  Draw a food chain most likely to be a part of a forest ecosystem.

Q5.  Rearrange the following according to their ascending trophic levels in a food chain. Hawk, grass, snake, frog, grasshopper.

Q6. If a harmful chemical enters a food chain comprising fishes,  phytoplankton and birds,  which of the organisms is likely to have minimum concentration of the harmful chemical in its body?

Q7. Rearrange the following according to their trophic levels in a food, chain.

Fish, zooplankton, sea, phytoplankton

Q8.  Which one of the following is always at the third trophic level in a food chain?

Carnivores, herbivores, producers, decomposers.

Q9. In a  food chain  .comprising  lion,  grass and deer, which will

(i)  transfer the maximum amount of energy.

(ii)  receive a minimum amount of energy.

Q10. In the following food chain,   20 J   of energy was available to the hawks. How much would have been present in the plants?         –

Plants → rats → snakes → hawks

Q11. If a   harmful chemical enters in food chain comprising snakes,  peacock,  mice and plants, which of these organisms is likely to have the maximum concentration of this chemical in its body?

Q12. The level of energy reaching from one to next higher trophic level decreases. Suggest a reason for this occurrence.

Q13. If the ozone layer disappears completely, what will be the consequences?

Q14. Name the group of chemical compounds which adversely affects the ozone layer?

Q15. To keep the environment clean, garbage disposal programme is an essential prerequisite. What methods constitute the garbage disposal programme?

Q16. List two methods of safe disposal of the non-biodegradable waste.  

Q17. List two items which can be easily recycled,  but we generally throw them in the dustbins?

Q18. A lake has been polluted by sewage. On comparison with the sample of unpolluted water, the water in the lake is found to have increased contents of some components. Identify these components.

Q19. Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?  

Q20.  Write one negative effect of the affluent lifestyle of few persons of a society on the environment.

Q21. List two man-made ecosystems.

Q22. Name the two abiotic components of ecosystem.

Q23. The first trophic level in a food chain is always a green plant. Why?

Q24. Pesticides added to a field is seen in increased amount in the crop and in the birds that feed on them. What is this phenomenon called?

Q25. Why are some substance non-biodegradable?

Q26. Mention one negative effect of our affluent lifestyle on the environment.

Q27. State a way to prevent the accumulation of harmful chemicals in our bodies.

Q28.  What is the ultimate source of energy in an ecosystem?

Q29. What happens when high energy ultraviolet radiations act on the oxygen at a higher level of atmosphere?

Q30.       Are plants actually producers of energy?

Q31.       How is being a vegetarian advantageous in terms of energy?

Q32.       Does change in lifestyle add waste to the environment?

Q33.       Give the difference between paper and glass as a waste product.

Direction (Q. Nos. 34 – 38) In each of the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as

(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion              ·

(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

(c) If Assertion is true, but Reason is false

(d) If Assertion is false, but Reason is true

(e) If Assertion and Reason both are false

Q34. Assertion: Food chains generally consists of more than four trophic levels.

            Reason: There is loss of energy at each trophic level and very little usable energy remains after four trophic levels.

Q35. Assertion: Certain pesticides and other chemicals used to protect our crops from diseases and pests are non-bio degradable.

            Reason: They do not get accumulated at various trophic levels.

Q36. Assertion: Ozone Layer protects life on earth by blocking out Infrared rays of the Sun.

            Reason: Infra-red rays cause cancer in human beings.

Q37. Assertion: Producers are the largest in number in any food chain.

            Reason: These large number of producers convert the sunlight into energy.

Q38. Assertion: An ecosystem consists of 3 to 4 tropic levels.

            Reason: Removal of Primary consumers will not affect the ecosystem adversely.

Q39.  Which trophic level is occupied by plants in a food chain?

(a) First

(b) Second

(c) Third              

(d) Fourth

Q40.  Which of the following in an example of a human-made ecosystem?

(a) Forest            

(b) Pond

(c) Garden           

(d) Lake

 Q41.  What is the average value for the amount of organic matter that is present at each level of trophic chain and reaches the next level of consumers?

(a) 11%

(b) 10%

(c) 100%             

(d) 50%

Q42. Which. of the following groups of organisms belong to category of producers?

(a) All green plants, fungi and bacteria

(b) All green plants and certain blue-green algae

(c) Bacteria, fungi and blue-green algae

(d) Certain blue-green algae and fungi

MANAGEMENT OF NATURAL RESOURCES

Q1.  How is the increase in demand for energy affecting the atmosphere?

Q2· Give an example to show that the exploitation of resources leads to pollution.

Q3. Make a list of a few industries that are dependent on forest products.

Q4. Suggest some consequences due to the loss of biodiversity?

Q5.  List two major benefits of Dams.

Q6. List two measures for the better management of water resources.

Q7. Name the tree for which Amrita Devi  Bishnoi and others sacrificed their lives.

Q8. State one reason for the conservation of forest and wildlife.

Q9. List two items which can be easily recycled, but we generally throw them in the dustbins.

Q10. Name two indigenous water saving methods.

Q11. State two causes of pollution of river Ganga.

Q12. List two change that you can make in your habits to reduce the consumption of electricity or water.

Q13.  During the recycling process of waste articles, what will be the starting step?

Q14.   In which region of India, Bundhis are used for water harvesting?

Q15.   Name the most common practice of recharging groundwater.

Q16.   How can we prevent floods?

Direction (Q. Nos. 17 – 21) In each of the following questions, a statement of Assertion is given by the corresponding  statement of Reason. Of the . statements, mark the correct answer as

(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion

(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion               ·

(c) If Assertion is true, but Reason is false

(d) If Assertion is false, but Reason is true

(e) If Assertion and Reason both are false

Q17. Assertion: We need to use our resources carefully.

            Reason: These resources are not unlimited and are exploited rapidly.

Q18. Assertion:  Large dams ensure storage of adequate water and also generate electricity, but still get criticism.

            Reason: Criticism about large dams address economic,  environment and social  problems.

Q19. Assertion: Mismanagement of the water has largely led to the benefits being cornered by a few people.

           Reason: People close to the source grow water-intensive crops like sugarcane and rice while people farther downstream do not get any water.

 Q20. Assertion: Bundhis are found in Rajasthan.

            Reason: Bundhis are traditional water harvesting structures.

Q21. Assertion: Large scale dams are sources for producing Electricity.

            Reason: Building of large dams are lead to around economic development at the site of dam.

Q19. Kulhs are water harvesting structures of

(a) Jammu region                               

(b) Rajasthan

(c) Kerala                                                  

(d) Himachal Pradesh

Q20. The main cause for abundant coliform bacteria in the river Ganga is

(a) discharge of effluents from motor vehicle industries

(b) washing dirty clothes with detergents

(c) disposal of unburnt corpses into water

(d) immersion of ashes into water

Q21.  Arabari forests of Bengal is dominated by

 (a) mangroove   

(b) bamboo

(c) teak                          

(d) sal

Q22.  It is important to make small check dams across the flooded gullies because they

(a) hold water for irrigation

(b) hold water and prevent soil erosion

(c) hold water permanently

(d) contaminate drinking water by animal excreta

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