VII Standard - 7th - Science - Third Term Final Exam - Annual Examination Question Paper - Samacheer Kalvi

 

III Term Final Examination

Class: VII                                                                                                         Time: 2.30 hrs

Subject:Science                                                                                                 Marks: 100

I.choose the correct answer: `                                                                                   10x1=10

1. Light that hits a mirror gets

a) Transmitted                  b) Reflected            c) Absorbed                d) Refracted

2. Light is a form of

a) matter                          b) energy                   c)medium                  d) particle

3. Telescope was invented by

a) Han Lippershey                                                       b) Galilio          

            c) Nicolus Coppernicus                                               d) Ptolomy

4. The moon takes _________ days to complete one revolution around the Earth

a) 25                      b) 26                                    c) 27                            d) 28

5. ____________ is a non-biodegradable material

a)Paper                  b) A plastic bottle            c) Cotton cloth               d) Wool

6.  __________ are that neutralize stomach acid.

            a) Antacid       b) Antipyretic              c) Analgesic                            d) Antihistanics

7. Which is the hottest part in the flame of   candle _________

a) Blue             b) Yellow                     c) Black                                 d). Way part

8. Eggs are rich in .

a) Protein           b) Carbo hydrate            c) Fat                                  d) Acid

9. The cultivation and production of silk is  known as .

             a) Horticulture  b) Floriculture           c) Agriculture                       d) Sericulture

10. The Keyboard shortcut is used to copy the selected text

a) Ctrl+c          b) Ctrl+v                     c) Ctrl+x                                  d) Ctrl+A

II.Fill in the blanks                                                                                                    5x1=5

11. A plane mirror produces a ____________ image

12. Waxing of moon means _________

13.world ORS day is _____________

14.Proteins and _____ rich in milk

15. Peace silk was produced in the year .___________

III.Analogy :                                                                                                              5x1=5

16. Older stars : elliptical galaxies :: younger  stars :---------------

17. Nearest galaxy : Andromeda :: Nearest star:-------- -------.

18. Cotton: natural : Polyester: ____________

19. PLA spoon : compostable : Plastic spoon :____________

20. Nylon :melts on heating : Silk:____________

 IV.Arrange in Correct Sequence                                                                            5x1=5

21.a)Mix water, starch, vinegar and glycerin in a cooking pot.

   b) Let the article cool for 24 hours before we use it.

   c). Shape material to form a cup or bowl.

   d) Continuously mix on medium heat until the  liquid turns clear.

   e) Spread the gel onto aluminium foil and cool.

  V .Answer any 15 of the following questions:                                                        15x2=30

 22. With the help of a diagram, state the laws of   reflection

 23. What are luminous objects?

 24. What are the parts of shadow?

 25. Write the items given here in the correct column (Stars, brick walls, plants, mirror,

     planets, electric light bulb, candle)

 26. Which country launched the world’s first artificial launch vehicle?

 27. Give the expansions of PSLV and GSLV

 28. What is the chemical name of the polymers that make up cotton?

 29. What is the 5 R principle?

 30. What is ignition temperature?

 31. Write about any two dairy products.

 32. Who invented the Ahimsa silk?

 33. What are the two types of fibres that are  obtained from animals?

 34. How to close a document?

 35. How should we treat animals?

 36. Write the symptoms of Anthrax

 37. Give two examples of thermosetting plastics.

 38. Name the four different types of galaxies.

VI.Answer any 5 of the following:                                                                               5x3=15

 39. What are the properties of shadow?       

 40. What is a shadow? What things are necessary for the formation of a shadow?

41. What is epicyclic model?

42. What does the term biodegradable mean?

43. Why do antiseptics differ from disinfectants? Give one example of each.

44. What are the characteristics of wool? Give any three.

45. What are the common diseases that are found in Poultry?

VII.Answer any 6 of the following                                                                                6x5=30

46. What are regular and irregular reflection? Explain with the help of diagrams

47. Define the following terms  a. Incident ray   b. Reflected ray   c. Normal

48. Write short notes on constellations.

49. List the advantages and disadvantages of synthetic fibres.

50. Make labeled diagram of a candle flame.

51. Write the uses of the wool.

52. Write about Ahimsa Silk.

53. a) Define – Sericulture

      b) What is shearing?