psc_science_englishv-2

(39) Which one is the main elements of the sun? a) Hydrogen and nitrogen b) Hydrogen and oxygen c) Hydrogen and carbon dioxide d) Hydrogen and Helium (40) Which one is seen every year in Bangladesh? a) Flood b) Earth quake c) Kalboishakhi d) Hurricane 2. Fill in the blanks: 110=10 a) Animals cannot produce its own _______. b) _______ is essential for life. c) We are surrounded by ______. d) The energy that works behind lightning is _____ energy. e) ________ of food provides energy for body. f) Teh pox virus can be spread through _______. g) There are countless _______ in the milky way. h) The aim of technology is to control ________. i) _________ reduces man’s physical labour.

J) More ________ is obtained if the sunlight comes vertically.

3. Write down the short answer of the following question in your answer scripts: 110=10 a) What is a star? b) What is the latest and modern technology you use? c) What is called green house? d) Why air and solar energy are called green energy? e) What does humidity of air mean? f) What are the chemicals used in foods? g) Why does matter change states? h) What is food chain? i) What do you understand by information technology?

J) What are the factors of changes in weather?

4. Including a and b answer any 8 of the following questions: 58=40 a) Describe how plants and animals depended on each other) b) Why is the temperature of the world increasing day by day? c) How is pond water purified to make it free from germs? d) What are the works where flow of air can be used? e) What are the processes of transmission of heat? f) Discuses the scientific methods of food preservation? g) What is infectious diseases? Discuss how infectious diseases can be prevented. h) Make a model of solar system. i) Give the examples of some misuses of science. j) Discuss what is fossil fuel.

Primary Education completion Examination-2013 Model TestSubject: Elementary Science Time: 2 hours 30 minutes Full marks: 100 1. Write the correct answer in answer script: 140=40 (1) How many years after population senses is usually done? a) Five b) Ten c) Fifteen d) Sixteen (2) Where the cyclone is called typhoon? a) In china and middle Asia b) In Arab and south Asia c) In japan and east Asia d) In Russia and west Asia (3) How much hours at a stretch is harmful for health to use computers? a) Two b) Three c) Four d) Five (4) Which one of the following in produced by green plants during the process of photosythesis? a) Light b) Air c) Heat d) Food (5) Which disease is caused by drinking Polluted water? a) Diarrhea b) Measles c) Tuberculosis d) Pox (6) Which one is the main cause of environmental pollution? a) To use chemical fertilizer b) To use vehicles c) To fulfill the demand of the over population d) To play mike loudly (7) Which one of the following in an important way to purify the water? a) Filtration b) Sedimentation c) boiling d) alum (8) Which type of rain is harmful for all the creatures? a) Hail storm b) Light rain c) Acid rain d) Heavy rain (9) In how many processes heat is transferred? a) Three b) Four c) Six d) Five (10) Which one of the following chemical is used as to adulterant food? a) Saccharine b) Sugar c) Glucose d) Salt (11) Which one of the following machine has the most contribution in medical sector? a) Barometer b) X-ray c) Mobile d) Microscope (12) Which one of the following is a correct food chain? a) GrassGrasshopperFrog b) GrassGrasshopperDeerTiger c) SnakeMongooseEagle d) GrasshopperRat Goat (13) The wastes of mills and factories pollutea) Sound b) Water c) Air d) Sound and Air

(14) The daily nutrient requirements depend upon-which of the following? a) Upon the ability to do the work b) Upon the age, height and weight of a person c) Upon Physical structure and work d) Upon wish, want and demand (15) Which direction does the Kalboishakhi come from? a) From the south-east direction b) From the north-west direction c) From the north-east direction d) From the south-west direction (16) How many population was in Bangladesh in 2001? a) 12 crore 14 lac b) 12 crore 93 lac c) 13 crore 14 lac d) 13 crore 93 lac (17) Which one is the way to over come the resource limitation and want of space? a) To save biological diversity b) Not to cut trees c) To more practice of science and technology d) To increase the educational institution (18) What should we do for resource protection and reduction of pollution environment? a) To stop production b) To destroy harmful insects c) Avoiding excess use of resources d) To build (19) Which one is used to produce the glass of window? a) Particular sand b) Brick c) Clay soil d) Loamy soil (20) What should we do after getting the alarm of cyclone? a) To take shelter under the bed b) To stand on the yard come out from the home c) Lay down on the ground d) To take housing in cyclone centre (21) What will happen if the green house gases are not present in the atmosphere? a) The earth would be in very hot state at night b) The earth would be in very cold state at day time c) The earth would be in very cold state at night d) The earth would be in very hot state in the morning (22) When does the possibility of rain increase? a) If less water vapours are there in the air b) If much water vapours are there in the air c) If temperature is more d) If pressure of air is more (23) When does the sunlight come vertically on Bangladesh? a) In summer and autumn b) In rainy season and late autumn c) In winter and spring d) In summer and rainy season

(24) Which one is the nearest star to the earth? a) Mercury b) Venus c) Mars d) Moon (25) Which scientist gave a model about day and night with the correct explanation? a) Galileo b) Newton c) Arkimides d) Copernicus (26) Who are mostly infected by Rheumatic Fever? a) Children b) Old persons c) Young people d) Woman (27) During the adolescence the boys and girls area) Keep quite b) Trying to give their opinion c) Working quickly d) Attentive in work (28) Which wave can be used to know the in formation of mineral under the soil? a) Magnetic waves b) Light waves c) Sound waves d) Air waves (29) When did the information technology develop? a) During the mid eighteenth century b) During the mid nineteenth century c) During the mid twentieth century d) During the mid twenty first century (30) By which did the greatest revolution occur in agriculture? a) Biotechnology b) Chemical technology c) Higher technology d) Insecticide (31) By cutting more forests and junglesa) Environment will be polluted b) Soil will be Polluted c) Water will be Polluted d) Air will be Polluted (32) Drinking of which water causes scar in the hands and legs? a) Dirty water b) Arsenic contaminated water c) Polluted water d) Pond water (33) What do the divers carry to stay under sea water for a long time in search of things? a) Oxygen b) Carbon monoxide c) Nitrogen d) Water vapour (34) How does the earth rotate on its axis? a) East to west b) West to east c) North to south d) South to north (35) What are the celestial bodies called which have lights of their own? a) Moon b) Stars c) Milky way d) Nebula (36) Which one of the following can utilize solar energy? a) In calculator b) In mills and factories c) In vehicles d) In musical instruments (37) When did population census done at first after liberation war? a) in 1972 b) in 1973 c) in 1974 d) in 1975 (38) For which disease BCG vaccine is given? a) Pox b) Measles c) Tuberculosis d) Influenza