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

 

ANNUAL EXAMINATION

CLASS      : IX                                                                                                  MARKS: 100

SUBJECT: SCIENCE                                                                                      TIME: 2.30 Hrs

 

I. Choose the correct answer:                                                                                 10x1=10

1. 1 metric ton is equal to

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

2. The size of an air bubble rising up in water

a) decreases                 b) increases      c) remains same              d) may increase or decrease

3. Resistance of a wire depends on,

a) temperature                  b) geometry      c) nature of material     d) all the above

4. The unit of magnetic flux density is

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

5. Calorie is the unit of

a) heat                          b) work                        c) temperature              d) food

6. __________ has the same properties  throughout the sample

a) Pure substance         b) Mixture       c) Colloid                     d) Suspension

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

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

8. Number of valence electrons in carbon is

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

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

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

10. The antibiotic Penicillin is obtained from______________

(a) plant                       (b) microorganism   (c) animal              (d) sunlight

11. Water vascular system is found in ________________

(a) Hydra         (b) Earthworm             (c) Star fish                 (d) Ascaris

12. Which of the following is a complex tissue?

            (a) Parenchyma            (b) Collenchyma                     (c) Xylem        (d) Sclerenchyma

13. The chemical reaction occurs during photosynthesis is _____________.

(a) CO2 is reduced and water is oxidized        (b)  water is reduced and CO2 is oxidized

(c) both CO2 and water are oxidized               (d)  both CO2 and water are produced

14. The structural and functional unit of the kidney is _____________

(a) villi                         (b) liver                        (c) nephron                 (d) ureter

15. The sprouting of onion and potatoes can be delayed by the process of _______________

(a) freezing      (b) irradiation               (c) salting                     (d) canning

16. Diptheria affects the

(a) lungs           (b) blood World of Microbes   (c) droplet infection     (d) throat

17. The production and management of fish is called

(a) Pisciculture                         (b) Sericulture              (c) Aquaculture            (d) Monoculture

18. Increased amount of _______________ in the atmosphere, results in greenhouse effect and global warming

(a) carbon monoxide   (b) sulphur dioxide      (C) nitrogen dioxide     (d) carbon dioxide

19. The plant body of mushroom is    

(a) Spawn                    (b) Mycelium               (c) Leaf                        (d) All of these

20. The animal without skull is   ___________________

(a) Acrania                   (b) Acephalia               (c) Apteria                    (d) Acoelomate

 

II.Answer any 10 of the following                                                                           10x2=20

21. Define taxonomy.

22.  Match it:

Sclereids	Trachieds
Xylem	Phloem
Chloroplast	Sclerenchyma
Companion cell	Chlorenchyma

23. Differentiate phototropism from photonasty.

24. Excretion and Secretion

25. Name any two naturally occuring toxic substances in food.

26. Name two common mosquitoes and the diseases they transmit.

27. Why is it important to conserve water?

28. Define measurement

29. Define velocity

30. Define magnetic flux density

31. Define conduction

32. State modern periodic law

33. How do atoms attain Noble gas electronic configuration?

34. What is Radio Carbon Dating?

 

III.Anwer any 8 of the following                                                                               8x4=32

35. List the medicinal importance of honey.

36. Give an account of classification of bacteria based on the shape.

37 Give abbreviations for the following.

i. ISI      ii. AGMARK  iii. FCI            iv. FSSAI

38. List five characteristic features of fishes.

39. Draw the structure of neuron and label its parts.

40. Differentaite Graphite and diamond

41. State any five features of modern periodic table

42. Wriye the electronic configuration of K,and Cl

43. State Kepler’s law

44. According to Cartesian sign convention which mirror and which lens has negative focal length?

45. State Fleming’s Left Hand Rule

46. List out any four adaptiations of xerophytes.

IV. Answer any 4 of the following                                                                      4x7=28

47. Give an account on phylum Arthropoda.

48. List out the differences between mitosis and meiosis.

49. Suggest the immunization schedule for a new born baby till 12 months of age. Why it is                  necessary to follow the schedule?

50. Explain a method to find the thickness of a hollow tea cup

51. Explain two types of transformer

52. Sulphuric acid is called King of Chemicals .Why is it called so?