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

 

III Mid-term Test

 

Class    : VII                                                                           Marks : 50

Subject: Science                                                                    Duration: 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.__________ is the daily essential product which is obtained from cattle

    a) Egg               b) Milk                 c) Both of them    d) none of them

9. Eggs are rich in ________

     a) Protein                    b) Carbohydrate          c) Fat                    d) Acid

10. The cultivation and production of silk is known as ____________

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

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. A natural fiber is called ________

15. Peace silk was produced in the year

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

26. Write the symptoms of Anthrax

27. Define – Sericulture
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 about Ahimsa silk