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| Solar System Grid image courtesy: pixabay |
| Q1: | Write the relation between electric power (W) of a device with potential difference (volt) across it and current (amp) flowing through it. | 1 |
| Q2: | Name two parts which constitute the central nervous system. | 1 |
| Q3: | Write the characteristic features of the micro organisms which help in the production of biogas in a biogas plant. | 1 |
| Q4: | Two solution A and B have pH 3 and 5 respectively. Which of the two solutions has more hydrogen ion concentration and which one is more acidic? Give reason for your answer. | 2 |
| Q5: | Give reason for the following: (a) Sodium metal is kept immersed in kerosene. (b) Blue colour of copper sulphate solution disappears when some aluminium powder is added in it. | 2 |
| Q6: | Give two reasons why different electrical appliances in a domestic circuit are connected in parallel. | 2 |
| Q7: | (i) Give reason ,”Magnetic field is strongest near the pole.” (ii) Describe an activity to show that magnetic field is strongest near poles of a bar magnet. |
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| Logo By National Consumer Helpline which runs consumer awareness programmes |
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| Do you know a longer lasting rainbow? Read below to find the answer. |
| Time allowed: 3 hours | ||
| The Question paper is divided into three sections: Section A- Reading 20 Marks Section B- Writing & Grammar 25 Marks Section C – Literature 25 Marks General Instructions: (i) All questions are compulsory. (ii) You may attempt any section at time. (iii) All questions of that particular section must be attempted in the correct order. | ||
SECTION A – READING
| 20 Marks | |
| Q1: | Read the passage given below and answer the questions/complete the sentences that follow: Sniffer dog Tucker uses his nose to help researchers find out why a killer whale population off the northwest coast of the United States is on the decline. He searches for whale faeces floating on the surface of the water, which are them collected for examination. He is one of the elite team of detection dogs used by scientists studying a number of species including right whales and killer whales. Conservation Canines are fast becoming indispensable tools for biologists according to Aimee Hurt, associate director and co-founder of Working Dogs for Conservation, based in Three Forks, Montana. Over the last few years, though, so many new conservation dog projects have sprung up that Hurt can no longer keep track of them all. Her organization’s dogs and their handlers are fully booked to assist field researchers into 2012. “Dogs have such a phenomenal sense of smell,” explained Sam Wasser, director of the Center for Conservation Biology at the University of Washington in Seattle. He has worked with scat-detection dogs since 1997. Scientists have been using Conservation Canines in their research since 1997. These dogs have enabled them to non-invasively access vast amount of genetic and physiological information which is used to tackle conservation problems around the world. Such information has proved vital for determining the causes and consequences of human disturbances on wildlife as well as the actions needed to mitigate such impacts. The ideal detection dog is extremely energetic with an excessive play drive. These dogs will happily work all day long, motivated by the expectation of a ball game as reward for sample detection. The obsessive, high energy personalities of detection dogs also make them difficult to maintain as pets. As a result, they frequently find themselves abandoned to animal shelters, facing euthanasia. The programme rescues these dogs and offers them a satisfying career in conversation research. (a) According to the text there are a few ................detection dogs like Tucker. (b) Tucker sniffs for whale................ . (c) The dogs are special because they assist in research without ........... . (d) The ideal detection dog ........... . (e) The dogs expect ............... as a reward of their hardwork. (f) ............ of these dogs make it difficult to keep them as pets. (g) These dogs find a career in ............ . (h) The word ‘ euthanasia means .............. . | 8 |
