psc_science_englishv-3

(40) Which one is the internet browsing software? a) Firefox b) Image c) Google d) Yahoo 2. Fill in the blanks: 110=10 a) The main source for the new technology is _________. b) Information is _______ of information technology. c) We sweat if there is more _____ in air. d) The increase of earth’s _______ is known as global warming. e) _______ energy is used in remote villages of Bangladesh. f) Mankind by using his intelligence and skill conquer the natural ____. g) Several ________ are connected to create food web. h) Small particles of water _______ at a place to form cloud. i) Oxygen creates ______ breaking down the foods we eat. j) The energy that works behind lightning is _________ energy.

3. Write down the short answer of the following questions in your answer scripts: 110=10 a) What is food web? b) Write down the names of three water-borne diseases. c) What disease will occur by drinking Arsenic contaminated water? d) What is acid rain? e) What is called energy? f) What is called a balanced diet? g) What is the name of the virus of swine flu? h) Give three examples of modern technology. i) What is called weather? j) What is called renewable natural resources?

4. Including a and b answer any 8 questions of the following: 58=40 a) Write down the names of artificial colour and chemicals which use in food and explain the danger of these colour and chemicals. b) Explain the uses of carbon dioxide. c) How is water pollution prevented? d) Discuss how air is polluted. e) Give some examples in which energy is wasted. f) Write your conception about the universe. g) Why should we be humane in the use of technology? h) Write about the ways to save or store information. i) Why does it rain on a hot, humid and very sweaty day? Explain. j) Discuss what could happening in Bangladesh due to the climate changes.

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 elements make a balanced diet? a) Three b) Four c) Five d) Six (2) Which microbe is the causal agent of Rheumatic fever? a) Streptococcus b) Pneumococcus c) Flu d) BCG (3) Which motion causes aloy and night? a) Diurnal motion Annual motion b) Annual motion c) Circular motion d) Reflective motion (4) What is information collected relating to a situation called? a) Data b) Report c) Speech d) Information (5) What is the storm created in the regions of the Indian Ocean called? a) Typhoon b) Cyclone c) Tornedo d) Tidal waves (6) How is the climate of Bangladesh? a) Hot and dry b) Cold and dry c) Hot and humid d) Cold and humid (7) Which one is the main cause of increasing carbon-dioxide? a) Deforestation b) Use of air energy c) Use of compost fertilizer d) Control of flood (8) Which one is a natural resource? a) Soil b) Water c) Plant d) All of the above (9) On which animals depend for their food? a) Solar energy b) Soil c) Plant d) Environment (10) Which one is responsible for water pollution? a) Excess population b) Cutting trees c) Build unplanned houses d) Burn bricks in brick fields (11) What should we do to protect the people of the coast from the global warming? a) To burn gas in the mills and factories b) To stop the production of electricity from the air c) To plant more trees d) To the use of solar energy.

(12) During the process of photosynthesis the green plantsa) Intake carbon dioxide b) Intake oxygen c) Produce nitrogen d) Release carbon monoxide

(13) The fertility of soil is decreaseda) Due to the smoke of mills and factories b) Use of excess chemical fertilizer c) Burns bricks in brick fields d) Through wastes here and there (14) Which condition does water remain in the atmosphere? a) Water vapour b) Liquid condition c) Solid condition d) Gaseous condition (15) We use the flow of air ina) The production of food b) The production of electricity c) To make engine d) The production of water vapour (16) What is the model of Copernicus? a) Day and night occurs because the earth rotates on its axis b) Day and night occurs because the earth moves round the sun c) The earth is stable d) Day and night occurs because the sun moves round the earth (17) The ancient people thoughta) The earth is motionless b) The earth moves round the stars c) The earth is not motionless d) The stars are motionless (18) What is the daily temperature of air, pressure, humidity and flow of air of a place called? a) Climate b) Weather c) Omabossa d) Solar-eclipse (19) How can we measure the water vapour in the air? a) Rain b) Pressure of air c) Temperature d) Humidity (20) What is the main cause of global warming? a) Increase of oxygen b) Increase of carbon dioxide c) Effect of methane d) Effect of water vapour (21) Which gas allow to prevent sun light to go from the heated earth? a) Nitrogen b) Helium c) Green house gas d) Ozone (22) Which one of the following is a source of fresh energy? a) Air b) Plants c) Coal d) Oil (23) Why air and solar energy are called green energy? a) Low cost b) Pollute environment c) Do not pollute environment d) Available (24) The resources which can be used again what are these called? a) Valuable natural resources b) Re-newable natural resources c) Non-re-newable natural resources d) Simple natural resources (25) What is self-employments? a) Government job b) Generating income by own self c) Working in the industries d) Private job

(26) Which one is used most in computer and mobile phone? a) Garmenium b) Sillicon c) Potassium d) Sodium (27) How much the population of Bangladesh increased from the 1974 census to 2011 census? a) Double b) Triple c) Fourth times d) Fifth times (28) Which one of the following causes the change of climate? a) Global warming b) Melting ice c) Increase the height of the sea water d) Decreasing oxygen (29) Which gas is increasing in the atmosphere day by day? a) Oxygen b) Nitrogen c) Hydrogen d) Carbon di oxide (30) Which one of the following is a greenhouse gas? a) Carbon dioxide b) Methane c) Water vapour d) All of the above (31) Which elements are mostly used in junk food? a) Sour, hot and sweet are in high quantity b) Saccharine, hot and sour are in high quantity c) Fat, salt and sugar are in high quantity d) Powder, fat and water are in high quantity (32) Which mosquito carries the germ of dengue fever? a) Filaria b) Malaria c) Aedes d) Anopheles (33) Which ages of the children are called childhood? a) From six to ten years b) From six to eight years c) From ten to twelve years d) From nine to twelve years (34) How many days the earth takes to move round the sun? a) 356 days 8 hours b) 365 days 6 hours c) 365 days 9 hours d) 365 days 5 hours (35) Compared to the earth how much smaller the moon is? a) 30 times b) 40 times c) 50 times d) 60 times (36) When do we see the Kalboishakhi in our country? a) In the end of Falgun and the start of the Chaitra b) In the end of chaitra and the start of Boishakh c) In the end of Kartik and the start of Agrohayon d) In the end of Joishtro and the start of Ashar (37) Which one of the following is an element of floating gardens? a) Husks, aquatic weeds b) Wastes of houses, grasses c) Fibers of jute d) Cow-dung, branches of trees (38) The solar energy turns into which energy? a) Electrical energy b) Sound energy c) Mechanical energy d) Atomic energy (39) What are these resources called which are not create of found? a) Valuable natural resources b) Natural resources c) Re-newable natural resources d) Non re-newable natural resources