VIII Standard 8th - Science - First Midterm Question Paper - Samacheer Kalvi

 

                                            I –MID TERM TEST                                                                                 

Class: VIII                                                                                   MARKS: 50

Sub: SCIENCE                                                                      Time: 1:30 Hrs

 

I. Choose the correct Answer:                                                             10x1=10

 

1. Electric current is a ______quantity

a) Base                           b) supplementary c) derived             d) professional

2. Luminous intensity is the intensity of         ______

a) Laser light                  b) UV light           c) visible light       d) IR light

3. Symbol of mercury is

a) Ag                              b) Hg                              c) Au                              d) Pb

4. A form of non-metal which has high ductility is

a) Nitrogen           b) oxygen             c) chlorine            d) carbon

5. The non-metal which conducts electric current is

a) Carbon             b) oxygen             c) aluminium                  d) sulphur

6. ______ is a prokaryotic microorganisms.

a) Virus                b) Algae                c) Fungi                d) Bacteria

7. Common cold in human is caused by   ______.

a) Plasmodium     b) influenza          c) vibrio cholera   d) aphthovirus

8. An example for colonial form of algae is

a) Oscillatoria                b) Nostac              c) Volvox             d) Chlorella

9. The first land plants are

a) Bryophytes                b) pteridophytes   c) gymnosperm    d) angiosperm

10. Penicillin is an antibiotic which is extracted from

a) Algae                b) fungi                 c) bryophytes                 d)pteridophytes

 

II. Fill in the blanks:                                                                             5x1=5

 

11. Water contains _________ and _________ element.

12. The symbol of tungsten is __________

13. The solid angle is measured in _______.

14. Binomial nomenclature was first introduced by ____________

15. The infecting virus particle found outside the host cell is _______.

 

III. Answer any 10 of the following:                                                        10x2=20

 

16. Define - Ampere.

17. Define - Mole.

18. What is electric current?

19. What is ductility?

20. Write three properties of metalloids.

21. Define Alchemy

22. Write the four types of bacteria, based on their shape.

23. What are pathogens?

24. Write the name of any nitrogen fixing bacteria.

25. What is meant by binomial nomenclature? Give example.

26. Write any two characters of dicotyledons.

27. Write any three economic importance of algae.

IV Answer any 3 of the following:                                                           3x5=15 

28.  Write a short note on different types of   clocks.

29. a) Mention the uses of the following compounds.

       i) Baking soda ii) Bleaching powder     iii) Quick lime

      b) Tabulate the differences between metal and non-metals.

30.  Write a short note on bacteria and its structure.

31. Write the differences between gymnosperm and angiosperm.