SCIENCE Class : VIII Date : 23rd November 2015 Max Marks : 80 Time : 11:00 to 12:30 noon Instructions to Candidates : Roll No. 01. This question paper has 40 objective questions. In addition to this question paper, you are also Centre No. given an answer-sheet. 02. Read the instructions carefully for each section before attempting it. 03. For each correct answer 2 marks will be Male / Female ___________________ awarded and there is no negative marking. 04. On the answer-sheet, fill up all the entries carefully in the space provided, ONLY IN Name of the candidate : (In English only, as you would BLOCK CAPITAL LETTERS. like it to be printed on the certificate). 05. Incomplete / incorrect / carelessly filled _____________________________________________________________ information may disqualify your candidature. 06. On the answer-sheet, use PENCIL / BLUE _____________________________________________________________ or BLACK BALL PEN. _____________________________________________________________ 07. No extra sheet will be provided for rough- work. Use the space available in the paper _____________________________________________________________ for your rough- work. 08. Use of calculator is not permitted. 09. No student is permitted to leave the examination hall before time is complete. 10. Use of unfair means shall invite cancellation Signature of the Signature of of the test. invigilator the candidate FOR COMPETITIVE EXAMINATIONS AMITY INSTITUTE Head Office: E-26, Defence Colony, New Delhi - 110024 Ph.: 011-24336143/44, 24331000-2 Amity Contact Points: Delhi Centres: Amity International School, M Block, Saket, New Delhi Ph.: 011-29563047; Amity International School, Sector 7, Pushp Vihar, New Delhi Ph.: 011-29561561 East Delhi : Amity International School, Mayur Vihar Phase-I Ext., Delhi, Ph.: 011-22710588, Janakpuri: B-1/632, main Nazafgarh Road, Janakpuri, New Delhi - 110058, Ph.: 011-25573111/12/13/14 Noida: Amity International School, J-Block, First Floor, Amity Campus, Sector-44, Noida-201303, Ph.:0120-2431842, 2431839 Ghaziabad Centre: Amity International School, HS-1, Sector-1, Vasundhara, Ghaziabad Ph.: 0120-2699456, 2699290, 2699291; Amity International School Campus, Sec-6, Vasundhara Yojna, Ghaziabad Ph.: 0120-4283778, 2699002 Gurgaon: Amity International School, Sec-46, Gurgaon, Haryana Ph.: 0124-3240105; Amity International School, Sec-43, Gurgaon, Haryana, Ph.:0124-2385110 Lucknow: Amity International School, Viraj Khand - 5, Gomti Nagar, Lucknow, Uttar Pradesh, Ph. : 081-273-68742/43, 0522-6523892 Website: www.amity.edu/aice Each question has four alternatives marked (A), (B), (C) and (D), but only one of these alternatives is the correct answer. Find the correct answer. 1. Most polluted stretches of river Ganga are near (A) Patna (B) Kanpur (C) Varanasi (D) Allahabad 2. Which of the following statements are true or false ? (i) Generally, June to September is the rainy season in India (ii) The soil is watered after sowing (iii) Only a few centimetres of the top layer of the soil supports plant growth (iv) Continuous growing of crops makes the soil poorer in certain nutrients (v) Kharif crops are grown in the winter season (vi) Rhizobium bacteria, present in the nodules of the roots of the leguminous plants, fix atmospheric nitrogen (A) true, false, true, true, true, true (B) true, true, true, true, false, true (C) true, false, true, true, false, true (D) true, false, true, true, false, false 3. (i) It improves the texture of the soil (ii) It increases the number of soil friendly microbes (iii) It enhances the water holding capacity of the soil (iv) It makes the soil porous due to which the exchange of gases become easy Here ‘It’ stands for (A) humus (B) manure (C) fertilizer (D) dung 4. Which one of the following is prepared from coal, water and air ? (A) Nylon (B) Terylene (C) Acrylic (D) Teflon 5. Which one of the following is the largest planet of the solar system ? (A) Jupiter (B) Saturn (C) Mars (D) Uranus AMITY INSTITUTE FOR COMPETITIVE EXAMINATIONS : Ph. : 24336143/44, 25573111/2/3/4, 0120-2431839/42 [2] Science- Class - 8, Nov. - 2015 6. Categorise the following diseases into viral, fungal, protozoan or bacterial diseases, by counting their numbers : Polio, Dengue, Typhoid, Rabies, Chickenpox, Ringworm, Common cold, Plague, Cholera, Kala Azar, Measles, Malaria, Tuberculosis, Athlete foot, Influenza, Whooping cough, Filariasis, Hepatitis B, Mumps, AIDS Viral diseases Fungal diseases Protozoan diseases Bacterial disease (A) 10 1 3 6 (B) 9 2 3 6 (C) 9 2 4 5 (D) 10 2 3 5 7. Which one of the following statements is incorrect ? (A) Sugar reduces the moisture content and inhibits the growth of bacteria which spoil foods like jams and jellies (B) Disease causing microorganisms are called pathogens (C) Edward Jenner discovered bacterium (Bacillus anthracts) which causes anthrax disease (D) Low temperature inhibits the growth of microbes 8. Read the following paragraph carefully and fill in the blanks with appropriate words : Our atmosphere has ....... nitrogen gas. Nitrogen is one of the essential .................. of all living ................... as part of proteins, chlorophyll, nucleic acids and vitamins. The atmospheric nitrogen cannot be ............ directly by plants and animals. Certain .............. and blue ............ algae present in the soil ........ nitrogen from the atmosphere and convert it into .................. of nitrogen. (A) 78%, constituents, organisms, absorbed, bacteria, green, trap, compounds (B) 78%, constituents, organisms, taken, bacteria, green, fix, compounds (C) 79%, constituents, species, taken, bacteria, green, fix, compounds (D) 79%, part, species, absorbed, microorganisms, red, trap, compounds AMITY INSTITUTE FOR COMPETITIVE EXAMINATIONS : Ph. : 24336143/44, 25573111/2/3/4, 0120-2431839/42 [3] 9. Esters are organic compounds. Polyesters are extensively used in manufacturing fabrics. In fruits, esters are the chemicals which (A) help them in ripening (B) help in increasing pulp in them (C) give smell in them (D) give them beautiful colours 10. Which one of the following metals is not ‘lustrous, malleable, ductile, sonorous and good conductor of heat and electricity’ ? (A) Aluminium (B) Mercury (C)Copper (D)Iron 11. Which of the following statements are true or false ? (i) One non-metal is one of the essential constituents of all living organisms (ii) The atom of an element remains unaffected by the physical changes in the element (iii) Copper reacts with dilute hydrochloric acid, when it is heated (iv) Magnesium ribbon burns in oxygen, forming magnesium oxide which dissolves in water. This oxide in water is acidic in nature (v) Generally, metals are hard. But metals like sodium and potassium are soft and can be even cut with knife (vi) There are no more than 92 naturally occurring elements. In these elements, metals and non-metals are almost of equal numbers (A) true, false, true, false, true, false (B) true, true, false, true, true, false (C) true, false, false, true, true, true (D) true, true, false, false, true, false 12. Which one of the following fuels is different from the other three ? (A) Coal (B) Wood (C) Petroleum (D) Natural gas 13. Which one of the following is not a constituent of safety match ? (A) Antimony trisulphide (B) Red sulphur (C) Potassium chlorate (D) Red phosphorus AMITY INSTITUTE FOR COMPETITIVE EXAMINATIONS : Ph. : 24336143/44, 25573111/2/3/4, 0120-2431839/42 [4] 14. Variety of products are obtained commercially from coal and petroleum. Due to great commercial importance, petroleum is also called ‘black gold’. In the following crossword, products obtained directly or indirectly from coal and petroleum are given. C D N A P T H A L A N E C Y S M E L E M E N C X O E B I T U M E N O O P K S A R R O W S G N A E E X P L O S I V E S L L G F E A C R Y L I C T P G I T E H U M P S S A A D B R P E R F U M E R I R R O U M E T A L S U N U E L D I E S E L E R T G S A D C N Y L O N E S S P A R A F F I N W A X B O L D L C A N D L E S K E R O S E N E O I L L The number of such products in the crossword is (A) 18 (B) 19 (C) 17 (D) 16 15. Which one of the following statements is incorrect ? (A) Carbon dioxide is the best extinguisher of fires (B) When released from cylinder, carbon dioxide expands enormously in volume and hence cools down (C) So, a cold cover forms a blanket around the fire, also cutting off oxygen from the air (D) Because oxygen is heavier than carbon dioxide, so oxygen goes away from the fire AMITY INSTITUTE FOR COMPETITIVE EXAMINATIONS : Ph. : 24336143/44, 25573111/2/3/4, 0120-2431839/42 [5] 16. Read the following paragraph carefully and fill in the blanks with appropriate words : Petroleum was ........... from ................. living in the sea. As these ................. died, their ................ settled at the bottom of the sea ad got covered with layers of sand and clay. Over ................ of years, absence of ........, high ................... and high pressure ....................... the dead ..................... into petroleum and ................ gas. (A) obtained, organisms, organisms, bodies, million, light, moisture, transformed, organisms, petroleum (B) formed, organisms, organisms, remains, thousands, light, temperature, transformed, organisms, natural (C) formed, creatures, creatures, bodies, thousands, air, temperature, transformed, creatures, petroleum (D) formed, organisms, organisms, bodies, millions, air, temperature, transformed, organisms, natural 17. Match the statements of Column-I and Column-II and