VII Standard - 7th - Science - - Third Midterm Examination - Question Paper - Samacheer Kalvi

 

III Mid-term Test

 

Class    : VII                                                                           Marks : 50

Subject: Science                                                                     Time: 1.30 Hrs 

I. Answer all the Question:                                                                 1x10=10

1. Light that hits a mirror gets     

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

2. ____________ Surface reflects the light well

  a) Water             b) Compact disc   c) Mirror                     d) Stone

3. Light is a form of energy

   a) Matter           b) Energy             c) Medium                   d) Particle

4. Choose the translucent substance from the following

    a) Glass            b) wood                c) Water                d) Clouds

5. The first man-made fiber is

     a) Nylon           b) Polyester          c) Rayon                        d) Cotton

6. Which of the following is the strongest?

    a) Rayon           b) Nylon               c) Acrylic                       d) Polyester

7. A good application of plastic is the use of ___________

    a) Blood bags   b) Plastic cutlery c) Plastic Straws    d) plastic carry bags

8 .Telescope was invented by

    a) Han Lippershey b) Galilio    c) Nicolus Coppernicus d) Ptolomy

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

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

10. The galaxy containing young and hot stars is

    a) elliptical galaxy  b) irregular galaxy   c) cluster d) spiral galaxy

II. Fill in the blanks:                                                                            1x5=5

11. A plane mirror produces a __________ image

12. The moon ____________ sun light

13. _________ is an example of polyester fabric.

14. Waxing of moon means _________

15. _________ is the first satellite launched by India

III.  Answer any 10 questions from the following:                                10x2=20

16. What are luminous objects?

17. What are the parts of shadow?

18. What is prism?

19. What is reflection of light?

20. Is the moon a luminous object?

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

22. Why is it better to avoid the use of plastic products?

23. What is the 5 R principle?

24. What does the term biodegradable mean?

25. Name the four different types of galaxies.

26. Give the expansions of PSLV and GSLV

27. i) Older stars : elliptical galaxies :: younger stars :---------------

      ii). Nearest galaxy : Andromeda :: Nearest star :-------- -------.

III. Answer any 3 questions from the following:                                   3x5=15

28. What are Regular and Irregular reflection? Explain with help of diagrams.

29. Define the following

     a) Incident ray           b) Reflected ray    c) Normal

30. List out the advantages and disadvantages of Synthetic fibers?

31. Write short notes on constellations.