IX Standard - 9th - Social Science - Third Term Final Question Paper - Annual Exam - Samacheer Kalvi

 

ANNUAL EXAMINATION 

CLASS: IX                                                                                                     MARKS: 100

SUBJECT: SCIENCE                                                                                    TIME: 3 HOURS

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I. Choose the correct answer:                                                                                            14 x 1 = 14

1. 1 metric ton is equal to

     a) 100 quintals                   b) 10 quintals             c) 1/10 quintals                       d) 1/100 quintals

2. Clouds float in atmosphere because of their low

     a) density                           b) pressure                 c) velocity                               d) mass

3. Which of the following converts electrical energy into mechanical energy?

     a) Motor                              b) Battery                    c) Generator                           d) Switch

4. Elements in the modern periodic table are  arranged in groups and periods.

    a) 7, 18                    b) 18, 7                       c) 17, 8                        d) 8, 17

5. Number of valence electrons in carbon is

   a) 2                           b) 4                             c) 3                              d) 5

6. Graphene is one atom thick layer of carbon obtained from

    a) diamond             b) fullerene                  c) graphite                   d) gas carbon

7. The unit of magnetic flux density is

    a) Weber                 b) weber/metre                        c) weber/meter²                             d) weber . meter²

8. Identify the animal having four chambered heart.

    a) Lizard                  b) Snake                     c) Crocodile                d) Calotes

9. The bending of root of a plant in response to water is called __________.

    a) Thigmonasty                   b) Phototropism          c) Hydrotropism          d) Photonasty

10. Bile helps in the digestion of _____________

    a) proteins                           b) sugar                       c) fats              d) carbohydrates

11. An internal factor responsible for spoilage of food is _______________

    a) wax coating        b) contaminated utensils         c) moisture content in food       d) synthetic preservatives

12. Which Indian variety of honey bee is commonly used for apiculture?

    a) Apis dorsata                    b) Apis florea                           c) Apis mellifera                      d) Apis indica

13. which key should be pressed to run a slide show ?

    a) F1                        b) Tab                          c) F5                d) F2

14. The slides are grouped together in a sequence to form _________________

    a) slide show                       b) sharts                      c) page                        d) messages

II. Answer any TEN of the following questions (Q.No 28 compulsary)                          10 x 2 = 20

15. Define least count of any device.

16. State Pascal’s law.

17.  What is specific heat capacity?

18. What is meant by supersonic speed?

19. What are the uses of Plaster of Paris?

20. What is Radio Carbon Dating?

21. What is nematocyst?

22. Why do we sweat?

23. Fill in the blanks:

6CO₂ + _______         Sunlight        ________ + 6O₂ 

                                                Chlorophyll

24. What is triple antigen?

25. Define Bacteriophages.

26. What are the uses of recycled water?

27. What is LibreOffice Impress?

28.  The speed of light in air is 3×10⁸ ms^–1 and in glass it is 2×10⁸ ms^–1. What is the refractive index of glass?

III. Draw and Label the Diagrams                                                                                             2x3=6

29. Draw the structure of oxygen and sulphur atoms.

30. Draw the structure of Neuron.

IV. Answer any EIGHT of the following questions (Q.No 42 compulsory)                        8 x 4 = 32

31. Explain the types of dyes based on their method of application.

32. Write any four uses of bases.

33. a) State Kepler’s laws.

     b) What factors have made life on Earth possible?

34. a) Differentiate step up and step down transformer.

      b) State the advantages of ac over dc.

35. a) Density of mercury is 13600 kg m^–3. Calculate the relative density.

      b) Calculate the apparent weight of wood floating on water if it weighs 100g in air.

36. Explain different types of motion.

37. Outline the flow charts of Phylum Chordata.

38. Explain the structure of nephron.     

39. Differentiate Macronutrients from Micronutrients

40. What is an adulterant? What are the effects of consuming adulterated food?

41. Explain carbon cycle with the help of a flow chart

42. Light enters from air into a glass plate having refractive index 1.5. What is the speed of light  in glass?

V. Answer the following questions                                                                                   4 x 7 =28

43. a) Describe the construction and working of mercury barometer.

(OR)

      b) List the applications of sound.

44. a) Write the differences between elements and compounds and give an example for each.

(OR)

      b) What is catenation? How does carbon form catenated compounds?

45. a) What are permanent tissues? Describe the different types of simple permanent tissues.

(OR)

      b) Define transpiration? How will you differentiate the different types of transpiration?

46. a) Suggest the immunization schedule for a new born baby. Why it is necessary to follow the schedule?

(OR)

      b) Give an account of different types of fish ponds used for rearing fishes.