Kendriya Vidyalaya Sangathan (Chandigarh Region)

KENDRIYA VIDYALAYA SANGATHAN (CHANDIGARH REGION)

SESSION-ENDING EXAMINATION 2017-18

CLASS-VIII

SUBJECT: SCIENCE

TIME:2 ½ hrM.M.80

GENERAL INSTRUCTIONS:-

1) All questions are compulsory

2)Question 1- 6 carries 1 marks

3)Question number 7 to 16 is short answer type questions. each question carries 2 marks

4)Question number17 to 22 are short answer type questions. each question carries 3 marks

5)Question number 23to 28 is long answer type questions. Each carries 5 marks Question number 29-34 contains 6 multiple choice Questions. Each question carries 1 mark

1.Name any two antibiotics. 1

2. Name two objects other than planets which are member of solar system. 1

3. Write any two features of ideal fuel. 1

4. Expand the term LED. 1

5. Name the scale used to measure intensity of Earthquake 1

6. Define the term Drag. 1

7. (i)Name the cell organelle which is present in plant cells but absent in animal cell

(ii)Write any one function of Chromosomes. 2

8. Draw a well label diagram of Animal cell and label any two parts. 2

9.Give two differences between metals and non metals on the basis of their physical properties. 2

10.Why do kabaddi players rub their hands with sand while playing. 2

11.Write four basic practices of crop production? 2

12.Write any two precautions to be taken during lightning. 2

13. Write any two consequences of deforestation. 2

14.Give a difference between a planet and a satellite with an example of each. 2

15.Write how Atmospheric Pressure varies with

(i)Altitude/height

(ii) Temperature2

16. .(i)What are weeds?

(ii)How can we control them? 2

17. (i)What are antibiotics?

(ii)Give two precautions which must be taken while using antibiotics? 2+1

18 One day Isha marked that her grandfather has been facing partial loss of vision and crystalline lens of his eye has become milky and cloudy. She reported the case to her father. Her grandfather had undergone eye surgery as per advice of eye specialist. Answer the following questions based on the above information

(i) Name the eye defect Isha’s grandfather suffering from

(ii)Give two ways of taking care of your eyes.

(iii)What values are shown by Isha? 1+1+1

19.Name the parts of Flame:-

(i)In which unburnt carbon particles are present.

(ii) Which is hottest?

(iii) In which complete combustion happens. 3

20.(i)Define the term Electroplating

(ii)Write any two uses of electroplating. 1+2

21.(i)Write two ways to protect yourself when an earthquake strikes while you are at home.

(ii)What is the other name of weak zones present in earth crust?

(iii) What do you mean by seismic waves?3

Suggest three measures to protect ourselves from lightning?

22. (i)While testing the sea water and tap water with the help of tester a boy observes more

compass deflection in case of sea water as compared to tap water .Explain the reason

for above cause in your own words.

(ii)How can we convert distilled water into good conductor?3

Is it safe for an electrician to carry out electrical repairs out door during heavy downpour?

Explain.

23 Answer the following

i)Name the process of fusion of gametes

ii) Name two methods of asexual reproduction

iii)Another term used for fertilised eggs

iv)The type of fission in Amoeba.

v) Name two animals in which fertilisation is external 5

24(i) A pendulum oscillates 40 times in 4 seconds. Find the time period and frequency

(ii) List any four sources of noise pollution in your surrounding. 3+2

25. (i)Explain the term global warming.

(ii) Write any two harmful effects of global warming.

(iii) What is acid rain ?

(iv) Name any two pollutants which make rain water acidic. 5

26.(i)Differentiate between contact and non contact force and give two examples of each.

(ii) Define pressure.Give its unit. 3+2

(i)Define force

(ii)Name three effects of force?

iii)What is atmospheric pressure?

27.(i)Draw the diagram of human eye and label any four parts.5

(ii) How can you take care of your eyes ?

*(Exclusively for visually impaired:

(i) Write the role of pupil, iris and retina.

(ii) How can you take care of your eyes ?)

28 (i) Draw the diagram to show the positions of stars present in (2,2,1)

(a)Ursa Major and

(b)Orion constellation.

(ii)Which is the largest planet of solar system?

*(Exclusively for visually impaired

(i) Give the names of various planets.

(ii)Which is the largest planet of solar system?

29.A Ball rolled with same speed on rough surface travels less distance as compared on smooth surface .why? 1

(a) Due to Force

(b) Due to Friction

d) none of these

30.What is the range of hearing for human Ear. 1

(a) 20Hz-2000Hz

(b) 20 Hz-20000Hz

(d) none of these

31Friction can be reduced by:-. 1

(a)Greasing

(b) Use of ball bearing

(d) All of the above

32. The SI unit of pressureis :- 1

(a)Pascal

(b) Newton

(d) m/s2

33. The property of sound on which its pitch depends is:- 1

(a)Amplitude

(b) frequency

(d) none of these

34. Which of the following is liquid at room temperature:- 1

(a)Mercury

(b) Sodium

(d) Helium

“END OF PAPER”

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