FA 3 PHYSICAL SCIENCE CLASS 8

CLASS-08

MODEL PAPER - 1

FORMATIVE ASSESSMENT - 3

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I. Choose the correct answer. 5x1 = 5M

1. …………… does not react with air. 

A. Gold B. Platinum 

C. both A and B    D. neither A nor B

2. This is not the use of sulphur 

A. Making Gun powder B. Making Crackers 

C. Making Match boxes D. Making Tincture iodine 

3. The property of drawing thin wire using metals is called …………..

A. Malleability B. Ductility 

C. Sonority D. Lustrous property 

4. The size of image in a plane mirror is …….. to that of size of object. 

A. Large B. Small 

C. Same size D. Can’t say 

5. An object is placed at 7cm distance in front of a plane mirror. What is the distance between object and its image?

A. 7cm       B. 14cm 

C. 21cm      D. 0cm 

II. Fill in the blanks. 5x1 = 5M

6. Copper sulphate + Zinc -> ………………..………. + Copper 

7. Generally non metallic oxides dissolve in water and form ……………..………… 

8.………………….. is the liquid metal. 

9. If light rays incident on opaque substances, ………………..……….. are formed. 

10. The light selects the path that takes least time to travel. This is ………….. rule. 

III. Answer the following questions. 3x2 = 6M

11. Which metals are used in making Jewellery ? Why?

12. Why does the image in plane mirror suffers lateral inversion ?

13. Imagine and write : What happens if mirrors are not there in the world?

IV. Answer the following question. 1x4 = 4M

14. (A) Write any eight uses of metals in our day to day life.

(OR)

 (B) How do you verify the 1st law of reflection of light with an experiment?