VI Standard - 6th - Science - Third Midterm Question Paper - 1 - Samacheer Kalvi

 

                                               III MID TERM TEST

CLASS:VI                                                                                  TIME:1.30 Hrs

SUBJECT : SCIENCE                                                             MARKS:50

I .CHOOSE THE CORRECT ANSWER                                        10  x 1= 10

1. Magnets lose their properties when they are

  a. used                      b. stored                      c. hit with a hammer                                     d. cleaned

2.An object that is attracted by magnet.

a. wooden piece         b. plain pins                c. eraser                                  d. a piece of paper

3. Mariner’s compass is used to find the

 a. speed                      b. displacement          c. direction                                          d. motion

4. Phenol is ________________.

 a. carbolic acid          b. acetic acid               c. benzoic acid                     d. hydrochloric acid

5. Soaps were originally made from ___________ .

 a. proteins                       b. animal fats and vegetable oils                                                             

c. chemicals extracted from the soil              d. foam booster

6. Gypsum is added to the cement for ______________________.

 a. fast setting                         b. delayed setting       c. hardening                           d. making past

7._________ is a biodegradable waste.

 a. Plastic                    b. Coconut Shell         c. Glass                                    d. Aluminium

8. _______ is an undesirable change that occurs in air and water.

  a. Recycling              b. Reuse                     c. Pollution                            d. Reduce

9. Producers are_______________

  a. Animals                b. Birds                        c. Plants                                  d. Snakes

10. Identify the fresh water ecosystem.

a. Pond                       b. Lake                       c. River                                   d. All of them

 

II.  Answer the following in detail ( ANY 10)                                                    10x2=20

11. Explain the attraction and repulsion between magnetic poles.

 

12. Match the following

1. Compass                – Maximum Magnetic strength

2. Attraction              -- Like poles

3. Repulsion              - Opposite poles

4. Magnetic poles     – Magnetic needle

13. What are the three main constituents of soap?

14. What are uses of Gypsum?

15. Analogy

       a. Urea : Inorganic fertilizer:  Vermi compost: ____________.

        b. _____________: Natural adhesives : Cello tape: Artificial adhesives.

16. Give an example for inorganic fertilizer.

17. Arrange the following in a correct sequence and form a food chain

1. Rabbit   à Carrot à Eagle àSnake

2. Humanà Insect àAlgae àFish

18. What are the two types of ecosystems?

19. What are pollutants?

20. What are the types of pollution?

21. A student who checked some magnets in the school laboratory found out that

their magnetic force is worn out. Give three reasons for that?

22. What is biodegradable waste?

III. Answer the following in detail ( ANY 4)

23. You are provided with an iron needle.How will you magnetize it ?

24. How are detergents manufactured?

25. Give two examples of how you can avoid or reduce waste?

26. Write a short note on noise pollution.

27.what is Reinforced cement concrete and write their uses .