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KENDRIYA VIDYALAYA SANGATHAN, CHENNAI REGIONSESSION ENDING EXAMINATION MARCH – 2020CLASS: VIII SUBJECT: SCIENCE TIME: 2.30 Hrs TOTAL MARKS: 80NOTE: i] Questions 1 to 16 are very short answer questions carrying one mark each ii] Questions 17 to 26 are short answer questions carrying three marks each iii] Questions 27 to 32 are long answer questions carrying five marks eachiv] All the questions are compulsory. However internal choices are provided and only one of the choices is to be answeredSECTION - A CHOOSE THE CORRECT ANSWER: 10X1=101. Which of the following diseases is not caused by viruses?a. Measlesb. Smallpoxc. Cholera d .Polio2. Which of the following is not a characteristic property of iron?a. Malleabilityb. Brittleness c. Ductility d. Sonorousness3. The parts which are not present in animal cell are: a. Cell membraneb. Chloroplastc. Cell wall d. Mitochondria4. The drinking straw works on the existence of:a. Forceb. Liquid pressurec. Atmospheric pressure d. None of these5. Rough surface has:a. Less frictional force b. More frictional forcec. Zero frictional forced. None of these6. Voice of which of the following is likely to have the minimum frequency?a. Baby girlb. Baby boyc. A mand A woman 7. The waves generated by the earthquake tremors are called :a. Ultrasonic waveb. Rhythmic wavesc. Systemic waves d. Seismic waves8. Which of the following is a non-luminous object?a. Sunb.Starc.Moond.Fire9. Which of the following is not a greenhouse gas?a. Carbon dioxideb. Nitrogen oxidec. Methane d. Nitrogen10. Which of the following does not contribute in producing acid rain?a. Nitrogen dioxideb. Nitrogen monoxide c. Carbon monoxide d. Sulphur dioxideFILL IN THE BLANKS:2X1=211. Force acting on unit area is called________________.12. Tissues make up_______________WRITE ONE WORD FOR THE FOLLOWING: 3X1=313. The liquid metal at room temperature is14. Name the first antibiotic 15. Name the substance which is used in carrom board to reduce friction.16. MATCH THE FOLLOWING: 5X1=5Column AColumn Ba.Weak zoneb.Day light birdc.Shape of aeroplaned.Magnete.Phosphoruskite, eagleBirdfault zonekept in waternon-contact forceSECTION-BANSWER THE FOLLOWING QUESTIONS: 10X3=3017. (a) What are preservatives? (b)Which disease is spread by:(i) Female Anopheles mosquito(ii) Female Aedes mosquito18. Why do the animals like frog and fish lay hundreds of eggs at a time?(OR) Explain the asexual reproduction in hydra with diagram.19.(i) What is cloning? ii. State whether gametes are involved in cloning or not. iii. Name one animal which has been produced by cloning.20.Write short note on the following: i) Nucleusii) Cytoplasm21.Write three chemical effects of electric current.22 a) Observe the diagram & identify the location of the Pole star. b) Why is it known as Pole star? c) What are the special characteristics of the Pole star?23(a) Identify the part which vibrates to produce sound in the following instrument: i. Dholak ii. Sitar iii. Flute iv. Shehnai (b) Name the sound producing organ in human.24 (a) Draw a diagram of solar system.(b) How many planets are there in solar system? Name them.25 (a) Why are the voices of men, women and children different? (b) On which factor does the pitch of sound depend? 26. Write three methods used to reduce friction. SECTION-CANSWER THE FOLLOWING QUESTIONS: 6X5=3027.(a) Write any three physical properties of metals and non-metals. (b) Identify the following non-metals: (i) Used to purify water (ii) Which all living beings inhale during breathing and essential for life?28. (a) What is gravitational force? (b) Is the gravitational force a contact or non-contact force? (c) Observe the following figure and answer the questions:i). Identify the figure?ii). Why such man places a round piece of cloth on his head?29. ‘X’ is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a kite with a tail.What is the general name of groups of stars like ‘X’? Write any two names of ‘X’.Is it a part of our solar system?Which famous star can be located in the sky with the help of ‘X’?How many bright stars are usually observed in ‘X’?30.With the help of a labelled diagram, describe in brief how an iron key can be electroplated with copper.31.What are the functions of the following parts of eye?a)Irisb) Eye-lensc) Retinad) Optic nerve e) Ciliary muscles32. Observe the following figures carefully and answer the following questions: Fig:1Fig:2Fill both tube and bottle with water. We observe that on filling water balloons get stretched. a. What happens to the force if some more water is added in the glass tube and bottle.b. Does the pressure of a liquid depend on its depth?c. What do you conclude from both figures?d. Does liquid exert pressure in all directions?_________________________________________________________________________ ................
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