OUR ENVIRONMENT 10

PRACTICE PAPER 

SUB : BIOLOGY (2020)

CLASS X                                      OUR ENVIRONMENT                                                   
  ________________________________________________________________________________

I.Very short answer type questions: 

1. Why should biodegradable and non-biodegradable waste be discarded in two separate dustbins ?
2. Why is improper disposal of waste a curse to the environment?
3. What are the advantages of cloth bags over plastic bags during shopping?
4. Mention one negative effect of our affluent lifestyle on the environment.
5. Write the common food chain of a pond ecosystem.
6. Which chemical is used in a fire extinguisher? How it is harmful?
7. Why are crop fields known as an artificial ecosystem?
8. State a way to prevent the accumulation of harmful chemicals in our bodies.
9. List two non-biodegradable waste generated daily in the kitchen which can be recycled.
10. Consider a food chain consists of Wheat, Rat, Snakes, and Peacock. What will happen if all the snakes are killed?
11. Choose one consumer each that belongs to the second and third trophic levels from the organisms. Eagle, Frog, Tiger, Rabbit, Fox
12. Pesticides added to a field are seen in an increased amount in the crop and in the bird that feeds on them. What is this phenomenon called?
13. What happens during the first step of ozone formation in the atmosphere?
14. List two main components of our environment. Why are green plants called producers?
15. Define ecosystem. Name the chemical compound which depletes the Ozone Layer.
16. Name the organisms belonging to 4th trophic levels in the food chain comprising of snakes, insects, frogs, plants, and hawks.
17. Name the two abiotic components of the ecosystem.
18. Mention the role of microorganisms like bacteria and fungi.
19. In the following food, chain grass provides 4000 J of energy to the grasshopper. How much energy will be available to Snakes and frog?  
20. State any two possible consequences of the elimination of decomposers from the earth.
21. Write any four examples of abiotic factors.
22. If autotrophs occupy the first trophic level are called producers then what are herbivores called?
23. What are biotic factors?
24. What is the full form of UNEP and CFCs?

II. Short answer type questions : 

1. In some states of our country, there is a ban on the use of Polythene bags for shopping. Why? List three advantages of using jute or cloth bags over Polythene bags.
2. Differentiate between food chain and food web.
3. Differentiate between household wastes and industrial waste.
4. In a food chain comprising Tiger, Plants, and Goat, which will transfer the maximum amount of energy and receive a minimum amount of energy.
5. What is the by-product of fertilizer industries? How do they affect the environment?
6. Why is the Government of India imposing a ban on the use of Polythene bags? Suggests an alternative to these bags and explain how this man is likely to improve the environment.
7. Explain some harmful effects of agricultural practices on the environment.
8. List two environment-friendly practice or habits which need to be followed by every member of the family community. Explain how this practice will support a safe environment mission.
9. Traditional use of forest areas is not useful in maintaining biodiversity. Do you agree with this statement? Explain with the help of an example.
10. What are the top carnivores? Give two examples.
11. Write any four effects of ozone depletion on our health.
12. In the food chain, grass → deer → lion operating in a forest, what will happen if (i) all the lions and (ii) deers are removed?
13. Why are only four or five trophic levels present in each food chain?
14. Industrialization is one of the main causes of depletion of the environment. List any four reasons in favour of this statement.
15. Why do enzymes which breakdown carbohydrates in food do not break down coal?
16. Discuss the feeding pattern in a food web.
17. What is ozone? How does it protect the organisms on earth?
18. Observe the food chain. A plant (1000 kj), Goat, Lion. How much energy does the Lion get in the above food chain?
19. What is the ecosystem? List two main components.
20. Phytoplankton ➝Small fish ➝ Large fish ➝ man. DDt has entered the food chain and caused serious damage to human health. Provide a solution to this problem. 
21. Give any two examples of each:
    (a) Organisms occupying the first trophic level.
    (b) Carnivores.
    (c) Biodegradable waste of humans.
    (d) Ecosystems.
    (e) Abiotic factors of an ecosystem.
22. It is said there is a need to put a blanket ban on the products containing aerosols. What are aerosols? Why is there a demand to put a ban on them?
23. Consider a food chain of the following fish, crab, and plankton shark. Arrange the above chain in the proper order of the trophic level. Mention the role of decomposers in our ecosystem.
24. Mention any three significances of a food chain.

III.Long answer type questions: 

1. What is meant by the food chain? The number of trophic levels in a food chain is limited. Give reasons to justify this statement.
2. We do not clean Ponds on lakes, but an aquarium needs to be cleaned regularly. Explain.
3. Our food grain such as wheat and rice, the vegetables and fruits and even meet are found to contain varying amounts of pesticide residue. State the reasons to explain how and why it happens?
4. What are decomposers? List two important roles they play in the environment. List two reasons to show that the existence of decomposers is essential in an ecosystem.
5. The maximum concentration of harmful chemicals accumulates in human beings. State the phenomenon involved and justify this statement.
6. Give any two ways in which biodegradable substances would affect the environment.
7. Give reasons: 
   (a) kulhads have been a band for serving tea or platform.
   (b) Decomposers are not included in any food chain.
8. Why produces are transducers energy?
9. Explain the role of UV radiation information of ozone with the help of a chemical reaction. Name the pollutant and write its role in the depletion of the Ozone layer.
10. What are biotic factors ? Give any two examples.
11. What are the problems caused by the non-biodegradable wastes that we generate?
12. What are consumers? Name the four categories into which the consumers are farther grouped.
13. Explain the phenomenon of Biological magnification. How does it affect organisms belonging to different trophic level particularly the territory consumer?
14. Damage to the Ozone layer is a cause for concern. Justify this statement. Suggest any two steps to limit this damage.
15. Why is only 10% of energy made available to the next trophic level when green plants are eaten by herbivores?
16. What is ozone? Show the reactions of the formation of ozone from oxygen in the atmosphere.
17. When did the amount of ozone in the atmosphere beings to draw sharply? Why did this happen? How was this problem taken care of by UNEP?
18. Explain why the use of plastic bags is banned in many places? What could be a more environment-friendly alternative?
19. What are tropic levels? Give an example of a food chain and state the different trophic levels in it.
20. Calculate the amount of energy is available to Lion in the following food chain if plants have 20000 joules of energy available from the sun.                 Plant ➝Dear➝Lion.
21. Why there is a progressive decline in the amount of energy at each trophic level?
22. On what basis are organisms grouped as producers consumers and decomposers. Write two problems that would arise if there were no decomposers in an ecosystem.
23. Define the following:
    (a) Food chain (b) Trophic level
    (c) Producers (d) Parasites 
    (e) Non-biodegradable substances.
24. Name the following:
    (a) Organisms feeding on animal and plant food.
    (b) Organisms breaking down the waste of living beings.
    (c) The organisms occupying the first trophic level of any food chain.
    (d) A complex network of much-interconnected food chains and feeding relationships.
    (c) The cumulative increases in the concentrations of the persistent substances in successively higher levels of the food chain.
25. It is said there is a need to put a blanket ban on the products containing aerosols. What are aerosols? Why is there a demand to put a ban on them?
26. Give any two examples of each:
    (a) Organisms occupying the first trophic level.
    (b) Carnivores.
    (c) Biodegradable waste of humans.
    (d) Ecosystems.
    (e)Abiotic factors of an ecosystem.
27. Consider a food chain of the following fish, crab, and plankton shark. Arrange the above chain in the proper order of the trophic level. Mention the role of decomposers in our ecosystem.
28. We often observe domestic waste decomposing in the by-lanes of residential colonies. Suggest ways to make people realize that improper disposal of waste is harmful to the environment.
29. Energy flow in a food chain is directional. Justify this statement.
30. Explain how the pesticides enter a food chain and subsequently get into our body.

Chapter 1 - Chemical Reactions and  Equations	Quick View	Questions with Solutions
Chapter 2 - Acid, Bases and Salt	Quick View	Questions with Solutions
Chapter 3 - Metal and Non-metals	Quick View	Questions with Solutions
Chapter 4 - Carbon and it's compound	Quick View	Questions with Solutions
Chapter 5 - Periodic Classification of Elements	Quick View	Questions with Solutions
Chapter 6 - Life Processes	Quick View	Questions with Solutions
Chapter 7 - Control and Co-ordination	Quick View	Questions with Solutions
Chapter 8 - How do Organisms Reproduce?	Quick View	Questions with Solutions
Chapter 9 -  Health and Heredity	Quick View
Chapter 10 -  Reflection and Refraction	Quick View	Questions with Solutions
Chapter 11 -  Human Eye Colourful World	Quick View	Questions with Solutions
Chapter 12 -  Electricity	Quick View	Questions with Solutions
Chapter 13 -  Magnetic Effect of Electric Current	Quick View	Questions with Solutions
Chapter 14 -  Sources of Energy	Quick View	Questions with Solutions
Chapter 15  - Our Environment	Quick View
Chapter 16 - Management of  Natural  Resources	Quick View

MANAGEMENT OF NATURAL RESOURCES 10

PRACTICE PAPER

SUB : BIOLOGY

CLASS X               MANAGEMENT OF NATURAL RESOURCES                   

________________________________________________________________

I. Very short answer type questions: 

1. How solar energy is made useful to the living world?
2. Name the group of Bacteria that contain the contamination of water.
3. What is coliform?
4. List two measures that you would suggest for the better management of water resources.
5. List two advantages associated with water harvesting at the community level.
6. Water is a valuable resource. List two way's that you would suggest every family member save this resource.
7. What measure would you take to conserve electricity in your house?
8. How does mining cause environmental pollution?
9. Although coal and petroleum are produced by the degradation of biomass, yet we need to conserve them. Why?
10. State the places that are referred to as biodiversity hotspots.
11. Suggest a few measures for controlling carbon dioxide levels in the atmosphere.
12. Mention one reason for discontentment among the people who have been displaced by buildings dams.
13. Name the tree for which Amrita Devi Bishnoi and others sacrificed their lives.
14. State one reason for the conservation of forest and wildlife.
15. List two items that can be easily recycled but we generally show them in the dustbin.
16. Give one example each from your daily life where the household waste can be effectively reused and recycle respectively.
17. How can we help in reducing the problems of waste disposal? List any two ways.
18. When the great Himalayan National Park was formed, the practice of grazing by sheep in summer was put to an end. What was the impact of stopping his practice? 
19. What is a watershed management system? 
20. List two benefits derived by the communities that participate in this system.
21. "We need to manage our resources" List two reasons to justify this statement.
22. List two causes of pollution of river Ganga. List any two measures that you suggest for better management of water resources. 
23. Name the dam on the river Narmada, whose height the Government wanted to raise.

II. Short answer type questions: 

1. What is water harvesting? How can this technique help in the conservation of water?
2. What is meant by biodiversity? List two advantages of conserving forests and wildlife.
3. Diagrammatically represent the khadin system of water harvesting.
4. Affluent lifestyle has and negative effect on the environment. Justify this statement with the help of examples.
5. Why do we seek the construction of dams? Mention any two problems faced with the construction of large dams. Suggest a solution to this problem.
6. State the main purpose of the water harvesting system and also mention the source which fills the pond behind harvesting structures.
7. List four disadvantages of burning fossil fuels.
8. Every one of us can do something to reduce the consumption of various natural resources. List four such activities based on the 3- R approach.
9. What is the role of wildlife and nature enthusiasts as a stakeholder with reference to forests?
10. Why do we need alternative sources of energy ? Give two reasons.
11. Why is the sustainable management of natural resources necessary? Which one out of reuse and recycle would you suggest to practice and why?
12. Mention the steps taken by the West Bengal government to protect badly degraded Sal forest?
13. List four advantages of water stored in the ground. List four stakeholders of forests.
14. What is the Chipko Movement? Why should we conserve forests?
15. List any two measures you would take to conserve electricity at your house so that the consumption of fossil fuel is reduced.
16. Why forests are considered biodiversity hotspots? What would happen due to the loss of biodiversity?
17. List two advantages associated with water harvesting at the community level "Management of natural resources required a long term perspective" Comment on the statement.
18. Narmada Bachao Andolan raised issues of how the construction of big dams creates environmental problems? Discussed two such issues.
19. Why must we conserve our forest? List any three causes of deforestation.
20. What are the advantages of watershed Management? Name any two ancient water harvesting structures for each of the following states. (i) Rajasthan (ii) Maharashtra (iii) Bihar.
21. Name four main components of coal and petroleum. List the benefits with the Chipko movement brought for the local population.
22. Although coal and petroleum are produced by the degradation of biomass, yet we need to conserve them. Why? List any two causes for the failure of the suspended availability of groundwater.
23. Name any two fossil fuels. Why are they so-called?  Mention the role of forest in conserving the environment. How does the forest get depleted?

III. Long answer type questions: 

1. Why is reusing even better than recycling? List any two reasons.
2. Why are the Arabari forests of Bengal known to be a good example of the conserved forest?
3. Give any three examples of human activities leading to the destruction of forests.
4. What is the importance of the forest as a resource?
5. Why is the sustainable management of natural resources necessary? Give an example of it. Out of the two methods used and recycle which one would you suggest to practice and why?
6. Suggest a few useful ways of utilizing wastewater.
7. By 1983 what was the value of the previously worthless sal forest in the Arabari forest range of Midnapore District?
8. Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilization can be minimized.
9. Name the way to capture the rainwater when it rains, store that water above ground or charge the underground and use it later. Write any three negative effects caused by deforestation.
10. Write any five ways in which the local and tribal are depend on the forest?
11. Define the following terms 
    (i) Coliform  
    (ii) Recycling 
    (iii) Sustainable development 
    (iv) Chipko Andolan 
    (v) Watershed management
12. What is a fossil fuel? Give two examples. 

Chapter 1 - Chemical Reactions and  Equations	Quick View	Questions with Solutions
Chapter 2 - Acid, Bases and Salt	Quick View	Questions with Solutions
Chapter 3 - Metal and Non-metals	Quick View	Questions with Solutions
Chapter 4 - Carbon and its compound	Quick View	Questions with Solutions
Chapter 5 - Periodic Classification of Elements	Quick View	Questions with Solutions
Chapter 6 - Life Processes	Quick View	Questions with Solutions
Chapter 7 - Control and Co-ordination	Quick View	Questions with Solutions
Chapter 8 - How do Organisms Reproduce?	Quick View	Questions with Solutions
Chapter 9 -  Health and Heredity	Quick View
Chapter 10 -  Reflection and Refraction	Quick View	Questions with Solutions
Chapter 11 -  Human Eye Colourful World	Quick View	Questions with Solutions
Chapter 12 -  Electricity	Quick View	Questions with Solutions
Chapter 13 -  Magnetic Effect of Electric Current	Quick View	Questions with Solutions
Chapter 14 -  Sources of Energy	Quick View
Chapter 15  - Our Environment	Quick View
Chapter 16 - Management of  Natural  Resources	Quick View

HOW DO ORGANISM REPRODUCE? 10

PRACTICE PAPER

SUB : BIOLOGY (2020)
CLASS X                HOW DO ORGANISM REPRODUCE?                         
_________________________________________________________________________________

I. Very short answer type questions:

1. Cell division is a type of reproduction in unicellular organisms. Justify. 
2.  List two functions performed by ovaries in human females. 
3. What happens when an egg is not fertilized?
4.  Name the plant that reproduces vegetable by leaf.
5.  Name the body parts where fertilization occurs in human females.
6.  Why is DNA copying necessary during reproduction? Or what is the importance of DNA copying in reproduction?
7. No two individuals are absolutely alike in a population. Why?
8.  Name the parts where sperms are formed in a male's body and eggs are formed in a female's body.
9.  State the number of male gametes produced by each pollen grains.
10.  What is the function of petals in a flower? 
11. Write the full form of IUCD and HIV.
12. How is the process of binary fission different in Amoeba and leishmania? 
13. List two preparation showed every month by the uterus in anticipation of pregnancy in humans.
14. Mention the two functions of human testes.
15. Trace the path of sperm from where they are produced in the human body to exteriors.
16. What is the role of seminal vesicles and the prostate gland in the human male reproductive system?
17. An organism which is a worm has very simple eyes, that are really eye spot which detects light. Name the organisms.
18. What is the main difference between sperm and egg of humans? Write the importance of this difference.
19. "The chromosomal number of the sexual products producing parents and their offspring is the same". Justify this statement.
20. Draw a labeled diagram to illustrate budding in Hydra.
21. List four advantages of vegetative propagation.
22. List four modes of Asexual Reproduction.
23. Differentiate between binary and Multiple Fission.
24. List two advantages of growing grapes or banana plants through vegetative propagation.

II. Short answer type questions: 

1. Name the type of sexual reproduction seen in Plasmodium and planaria.
2. What is the fate of the ovule and ovary in a flower after fertilization? How is the process of pollination different from fertilization?
3. In the bisexual flower in spite of the young stamen beings removed artificially, the flower produces fruits. Provide a suitable explanation for the above situation.
4. Identify among the following organism which is reproduced by Sexual and which by Asexual method.
   Amoeba,  human beings, whale, hydra, dog,  spirogyra.
5. Can you consider cell division as a type of reproduction in unicellular organisms? Give one reason.
6. Write two functions of each (i) testes (ii) ovaries.
7. Name any two sexually transmitted diseases. How do these infectious diseases spread from one person to another? Give two symptoms of STDs.
8. Differentiate between vas deference and fallopian tube.
9. Can termination of pregnancy be misused by people? Justify your answer with reason.
10. Explain how offspring and parents of organisms reproducing sexually have the same number of chromosomes?
11. List two suitable difference between pollen grain and ovule.
12. Which part or organs of the human reproductive system perform the following functions:
13. (i) Site of implantation of gamete. (ii) The entry of sperms in the female reproductive system.
14. Give anyone the difference between radical and plumule.
15. Which part or organ of the human reproductive system performs the following: (i) Site of fertilization (ii) Production of ova.
16. State a difference between unisexual and bisexual flowers.
17. What is mensuration? Explain why it occurs?
18. What is meant by DNA copying? Mention its importance in reproduction. 
19. Explain why does menstruation occurs in human females.
20. Fallen leaves of Bryophyllum on the ground produce new plants whereas the leaves of rose do not. Explain this difference between the two plants.
21. How does the embryo get nourishment inside the mother's body?
22. What is meant by vegetative reproduction? How will a plant be benefited if it reproduces by vegetative propagation?
23. What is placenta? Mention the functions of (i) placenta (ii) fallopian tube in the human female reproductive system?
24. List any two contraceptive methods practiced only by women. Mention how these methods work?
25. Explain the process of regeneration in planaria. How is this process different from reproduction?
26. List any two modes of asexual reproduction in animals. Under which mode of reproduction is vegetative propagation placed and why?
27. List two advantages of vegetative propagation.
28. How do leishmania and plasmodium reproduce? State one difference in their mode of reproduction.
29. What is the gestation period? If a woman is using a copper T, will it help in protecting her from sexually transmitted diseases?

III. Long answer type questions: 

1. Justify the following statements "The use of the contraceptive method has a direct effect on the health and prosperity of the family"
2. Which species is likely to have a better chance of survival - the one reproducing asexually or one reproduction sexually? Justify your answer.
3. What is the effect of DNA copying, which is not perfectly accurate in the reproduction process? 
4. How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
5. Draw the diagram to explain the regeneration that takes place in each of the body parts of planaria when its body is out into pieces. Name any other organisms in which a similar process can be observed.
6. Write the name of the part of a flower that serves as the same function the following do in the animals: (i) testes (ii) sperm (iii) ovary (iv) egg. State the functions of flower in the flowering plants.
7. Define the following process of sexual reproduction (i) Spore formation (ii) Regeneration (iii) Multiple Fission.
8. Describe in brief the function of various parts of the female reproductive part of a bisexual flower.
9. Write two examples each of sexually transmitted disease caused by virus and bacteria.
10. Explain how the transmission of AIDS disease is prevented.
11. Name the following (i) Threadlike nonreproductive structures represent in Rhizopus. (ii) Blobs that develop at the tips of the nonreproductive thread in Rhizopus. (iii) Explain the structure and the function of the structure released from the Blobs in Rhizopus.
12. Name three parts of the carpel and given one function of each :(i) Ovary (ii)Style (iii) Stigma.
13. Is copying a DNA formed during reproduction identical to the original cell?  Give a reason for the support of your answer and explain how DNA copying is beneficial for the species.
14. Mention two secondary sexual characters in human males. Why testes in the male body are extra-abdominal. Write the dual purpose served by urethra in the male.
15. What is vegetative propagation? When it is used? List two uses.
16. Distinguish between self-pollination and cross-pollination. How does the fusion of male and female gametes take place in plants?
17. Explain the following:(i)Testes and Ovaries are considered as a primary sex organ. (ii)  Advantage of seed production in plants (iii) Vas defense in long in human males.
18. Name an organism that reproduces by regeneration.  Name any two plants that reproduce by grafting.
19. List any two benefits to an organism that reproduce through spores.
20. With the help of a diagram showing a sexual reproduction in rhizopus. How this method is disadvantageous for rhizopus?
21. Differentiate between binary and multiple fission. Name an organism that reproduces by multiple fission. Vegetative propagation is beneficial to plants that are propagated asexually. Give two advantages.
22. Give reasons:(i) Wind act as pollinating agents (ii) Variation is essential and beneficial to the species. (iii) The use of condoms prevents pregnancy.
23. Draw neat labeled diagram for a germinated seed and level radicle plumule and cotyledon. Mention functions of each of these parts.
24. What is the placenta explain its role in the development of a human embryo?
25. State, in brief, the function of following organs in the human male reproductive system :(i) Ovary (ii) Fallopian tubes, (iii)  Uterus. 
26. How many eggs are produced every month by either of the ovaries in human females? Where does fertilization take place in the female reproductive system? What happens in the case of an egg released by the ovary is not fertilized.
27. Why is vegetative propagation practiced for going some type of plant? Name the different parts of a flower that has themselves. List any two agents of pollination.
28. State one functions of each of the following parts of a human male reproductive system.
    (i) Vas defense (ii) Testes (iii) Posted gland. 
29. Name the reproductive part of the human female reproductive system:
    (i) that produces eggs 
    (ii) where the fusion of eggs and sperms takes place, and 
    (iii)where zygote gets implanted.
30. Describe in brief what happens to the zygote after it gets implanted?
31. Write the name of the male reproductive organ that produces sperm and secretes hormones. Name the hormone secreted and state its functions.
32. Write the site of fertilization and the part where the zygote gets implanted in the human females.
33. Draw a diagram showing the germination of pollen on the stigma of a flower. Level pollen grains, male germs cell, pollen tube and female germ cells in the above diagram. Define fertilization in plants.
34. What are the different methods of asexual reproduction? Explain budding and regeneration with diagrams.
35. Name the following: Organism which reproduce by :
    (i) Binary fission 
    (ii)multiple fission 
    (iii) budding 
    (iv) fragmentation 
    (v) spore formation.
36. Name to sexually transmitted disease. Why parental determination is prohibited by law? What are the different methods of contraception?
37. Differentiate between the following:
    (i) Pollen tube and style,
    (ii) Fission in Amoeba and plasmodium.
    (iii)Fragmentation and regeneration.
    (iv) Bud of Hydra and bud of Bryophyllum 
    (v) Vegetative propagation and spore formation.
38. List three distinguishing features between sexual and asexual types of reproduction.
39. Explain why variation is observed in the offspring of sexually reproducing organisms?
40.  What is pollination? How does it occur in plants? How does pollination lead to fertilization? Explain.
41. List two advantages of sexual reproduction over Asexual Reproduction. 
42. How will an organism be benefited if it reproduces through spores? List two contraceptive methods and state two benefits of adopting these methods.
43. (i) Draw a neat diagram of the human male reproductive system and label the parts performing the following functions. (a)Production of sperms (b) Gland which provides fluid. (c) provides low temperature for the production of sperm (d) common passage for sperm and urine. (ii) Name a sexually transmitted disease and a method to avoid it.
44.  In the diagram of the human female reproductive system given below:   (i)Level the part A and B (ii) Name the hormones produced by organ X (iii)Mention the name of the substance that is transported by tubes (a)C and(b) D.     
45. Name the parts A, B, and C shown in the given diagram and state one function of each part.

Chapter 1 - Chemical Reactions and  Equations	Quick View	Questions with Solutions
Chapter 2 - Acid, Bases and Salt	Quick View	Questions with Solutions
Chapter 3 - Metal and Non-metals	Quick View	Questions with Solutions
Chapter 4 - Carbon and it's compound	Quick View	Questions with Solutions
Chapter 5 - Periodic Classification of Elements	Quick View	Questions with Solutions
Chapter 6 - Life Processes	Quick View	Questions with Solutions
Chapter 7 - Control and Co-ordination	Quick View	Questions with Solutions
Chapter 8 - How do Organisms Reproduce?	Quick View	Questions with Solutions
Chapter 9 -  Health and Heredity	Quick View
Chapter 10 -  Reflection and Refraction	Quick View	Questions with Solutions
Chapter 11 -  Human Eye Colourful World	Quick View	Questions with Solutions
Chapter 12 -  Electricity	Quick View	Questions with Solutions
Chapter 13 -  Magnetic Effect of Electric Current	Quick View	Questions with Solutions
Chapter 14 -  Sources of Energy	Quick View
Chapter 15  - Our Environment	Quick View
Chapter 16 - Management of  Natural  Resources	Quick View