psc_science_englishv-4

i) By putting dam in kaptai river of chittagong we are producing _____ from water. j) Urea is produced using _______ gas of air.

3. Write down the short answer of the following question in your answer scripts: 110=10 a) What is called non renewable natural resources? b) What is the way to solve population over growth? c) What is the main cause of global warming? d) How is the climate of Bangladesh? e) What is food preservation? f) What is diurnal motion? g) How dengue fever spread? h) What are the names of the input devices of a computer? i) What is matter made of? j) Which gas helps the fire to stop?

4. Including a and b answer any 8 question of the following questions: 58=40 a) Write down the necessity of environmental conservation. b) Write down the uses of technology on agriculture. c) Explain water cycle with figures. d) Write the steps to be taken to prevent air pollution. e) Describe the properties of the three states of matter. f) Write about the nature of the sun. g) Technology influences our life- explain. h) Why greenhouse remains warm? explain. i) Discuss three methods of optimum use of resources. j) Write down the impacts of excess population on natural environment.

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) Which one is the main source of the energy? a) Water b) Air c) Soil d) Sun (2) Which one is polluted by high volume? a) Air b) Soil c) Sound d) Water (3) Which one is essential to maintain the proper temperature of our body? a) Water b) Heat c) Light d) Air (4) Which one is needed to burn the fire? a) Oxygen b) Nitrogen c) Hydrogen d) Phosphorus (5) What is the ability to do the work called? a) Sound b) Energy c) Motion d) Heat (6) Which type of food is very much important for a healthy life? a) Easy cost food b) Balanced diet c) Heavy food d) Expensive food (7) The bone joint pain is the symptom of which disease? a) Pox b) Dysentery c) Aids d) Rheumatic fever (8) Which one is bigger from the sun? a) Earth b) Jupiter c) The universe d) Moon (9) What is the reason behind the invention of all new technologies of the scientist? a) Encouragement b) Feeling of necessity c) Competition d) Earning money (10) Which one exchanges the information? a) Ram b) Pen drive c) Key-board d) Mouse (11) Which one is caused by the pollution of air of the children? a) Heart disease b) Ashthama c) Diarrhoea d) Dysentery (12) Why the sea water creates clouds in the sky by evaporation? a) For light energy b) For heat energy c) For sound energy d) For mechanical energy (13) Usually brick powder mixed with which food? a) Corrialder b) Chili c) Turmeric d) Cumin (14) Aedes mosquitoes breed usuallya) In broken pots with water b) In dark place c) In the correct of room d) In damp place

(15) Which situation will be created if the moon rotates and comes between the earth and the sun? a) Lunar month b) High tide-low tide c) Night d) Omabossa (16) For which one of the following the animal depends upon the plants? a) Light b) Water c) Seed d) Food (17) Which one of the following causes air pollution? a) Use of pesticide b) Burning bricks in the brick field c) Obstacle of rain water d) Use of chemical fertilizer (18) Which of the following provides nutrition to plants? a) Soil b) Water c) Air d) Light (19) Which one does increase if fuel is burnt? a) Oxygen b) Carbon dioxide c) Nitrogen d) Neon (20) What type of substance is diamond? a) Hard b) Soft c) Heavy d) Light (21) The use of artificial colour and chemical in food can causea) Dental problem b) Kids getting fat c) Liver and kidney became dysfunctional d) Kids lose weight (22) Why does season change? a) Due to diurnal motion of earth b) Due to annual motion of earth c) Due to the elliptical orbit of earth d) Due to temperature change of sun (23) Which one is necessary for the invention of a technology? a) Financial ability b) Physical ability c) Knowledge of science d) Family background (24) Information technology has reduced aira) Intellectual activity b) Physical labour c) Communication d) Agricultural labour (25) What does air temperature mean? a) How much hot or cold b) More vapours or less vapours c) Whether air is dense or light d) More sunlight or less sunlight (26) Which one is the main way to prevent the water pollution? a) To purify the wastes b) Not to through wastes into the water c) To maintain the law of wastes d) Not to create the wastes (27) Which colour the tube-wells marked which have Arsenic contaminated water? a) Blue b) Red c) Green d) Sky blue (28) Which gas is taken in the cylinder for climb a high mountain? a) Oxygen b) Carbon dioxide c) Nitrogen d) Carbon monoxide (29) Which one of the following happens during the adolescence changes? a) Getting friendly with all b) More keen to studies c) Likes to go school every day d) Physical, mental and behavioral change

(30) Which does not belong to the solar system? a) Earth b) Comet c) Galaxy d) Moon (31) Which one is not influenced by technology? a) Education b) Communication c) Agriculture d) Lengths of day and night (32) What does happen when air pressure falls down excessively? a) Storm b) Rain c) Heat wave d) Cold wave (33) According to the scientist which one of the following will be exhausted in next 100 years? a) Natural resources b) Animals resources c) Fossil resources d) Air resources (34) Which one of the following is non-renewable resources? a) Air b) Wood c) Petroleum d) Water (35) To convert the population into resources we needa) Quality science teacher b) Quality books c) Basic knowledge and skill d) Realistic science education (36) The basic need of a infant isa) Mothers milk b) Dress c) Medical care d) Housing (37) What was the population of Bangladesh in 2011? a) about 14 crore b) about 15 crore c) about 16 crore d) about 17 crore (38) What do you mean by climate? a) The average of the weather for a short time b) The average of the weather for few weeks c) The average of the weather for few months d) The average of the weather for few years (39) Which one is the central star of the solar system? a) Moon b) Galaxy c) Nebula d) Sun (40) Which one is preserved by scientific method? a) Dry fish b) Powder milk c) Wheat d) Morobba 2. Fill in the blanks: 1ď‚´10=10 a) Energy cannot be _______ or cannot be _______. b) ________ food do not have dietary fiber. c) We need to have safe water to keep ourselves ________. d) The objective of studying science is to find out _______. e) Knowledge of _____ is essential for proper use of technology. f) _______ has brought revolution in information technology. g) Climate is the overall condition of the _____ of a place for many years. h) The main cause of global warming is the increase of _______ gas in atmosphere.