psc_science_englishv-8

3. Write down short answer of the following questions in answer script:110=10 a) What is food chain? b) What is sun? c) When does the adolescence of boys start from? d) Write the name of five sources of energy? e) What is acid rain? f) What are the main elements of food? g) Which mosquito causes elephantiasis? h) What is galaxy? i) Write the names of four renewable natural resources? j) Why does season change?

4. Including a and b answer any 8 of the following questions: 58=40 a) What measures can you take to prevent sound pollution? b) How can we use wind flow? c) Write the necessity of protecting plants and animals. d) How can you prove that there are always some water vapour in the air? e) What is optimum food? Discuss the importance of taking optimum food. g) What is windmill? Describe in brief. h) Technology does not remain the same, changes all the time-explain with examples. i) Write down the impacts of excess population on natural environment. j) Write about the nature of sun.

Primary Education completion Examination-2013 Model TestSubject: Elementary Science Time: 2 hours 30 minutes Full marks: 100 1) Write down the correct answer in your answer script: 140=40 (1) Green plants produce food in which process? a) Transpiration b) Pollination c) Photosynthesis d) Osmosis (2) What is the main source of energy? a) Oil b) Sun c) Electricity d) Coal (3) Animals are dependent on plant for which of the following? a) Light b) Water c) Seed d) Food (4) What is responsible for water pollution? a) Building open latrine on water body b) Wastes from industry c) Use of vehicle d) Destroying forests (5) Water changes into what due to sunlight? a) Ice b) Rains c) Steam d) Fog (6) What poisonous material is found in tube well water? a) Arsenic b) Iron c) Carbon d) Mercury (7) Without which element of air plants and animals cannot survive? a) Nitrogen b) Oxygen c) Hydrogen d) Carbon dioxide (8) Which one is air borne disease? a) Cholera b) Pox c) Dysentery d) Jaundice (9) Oxygen is used in which purpose? a) Respiration problem of patient b) Making house c) Producing fertilizers d) Putting out fire (10) What would be given to diarrhea patient? a) Rice and fish b) Fruits c) Oral saline d) Vegetables (11) What type of transformation happens during lighting electric bulb? a) Electric energy  Heat energy b) Electric energy  Chemical energy c) Electric energy  Light energy d) Electric energy  Mechanical energy (12) What is the only satellite of earth? a) Moon b) Sun c) Star d) Mars (13) Which one of the following is an infections disease? a) Diabetes b) Bone-pain c) Cancer d) Swine flu

(14) How many planets are there in solar system? a) 8 b) 10 c) 11 d) 15 (15) Which of the following has it’s own light? a) Sun b) Earth c) Venus d) Moon (16) What does divers carry with them in cylinder? a) Nitrogen b) Oxygen c) Iron d) Cupper (17) Chlorophyll helps to do what? a) To save generation b) To produce food c) Respiration d) To gather water (18) We live in which planet of the solar system? a) Mars b) Saturn c) Earth d) Uranus (19) Which of the following is the safe source of water? a) Pond b) Tube-well c) River d) Stream (20) How many main food elements are there? a) 3 b) 4 c) 5 d) 6 (21) Which one is the virus of swhine flu? a) H1P1 b) H1N1 c) H1M1 d) H1K1 (22) Which mosquito is the bearer of dengue fever? a) Anopheles b) Aedes c) Fly d) Culex (23) Day and night occurs due toa) Earth rotates around sun b) Sun rise and sun set c) Earth rotates on it’s exis d) Moon rotates around Earth (24) How many states of matter are there? a) 3 b) 4 c) 5 d) 6 (25) Which state of matter milk is? a) Solid b) Liquid c) Gaseous d) Hydroates (26) What is called the capacity to do work? a) Energy b) Work c) Rotation d) Joule (27) Which of the following chemical is used to adulterant food? a) Formalin b) Iodine c) Calcium d) Carbohydrate (28) What does increase due to burning fuel in the air? a) Oxygen b) Carbon dioxide c) Neon d) Helium (29) Which one of the following is junk food? a) Banana b) Meat c) Burger d) Carrot (30) Disease that spreads from one person to another is calleda) Virus disease b) Infectious disease c) Water borne disease d) Air borne disease (31) How is the climate of Bangladesh? a) Hot and humid b) Hot and dry c) Dry and humid d) Hot and rainy

(32) What is called the rising temperature of earth? a) Greenhouse b) Global Warming c) Changing climate d) Changing weather (33) Why it rains more in rainy season? a) Temperature of air increases b) Air pressure increases c) Humidity of air increases d) Air becomes dry.

(34) What is produced in green house? a) Green vegetables b) Fish c) Trees d) Fruits (35) Which one is renewable natural resource? a) Oil b) Water c) Gas d) Fossil fuel (36) What is the basic need of a infant? a) Mother’s milk b) Dress c) Medicine d) Housing (37) Which of the following are the fuel source in future? a) Solar energy and air b) Oil and gas c) Coal and Oil d) Trees and bio-gas (38) What is the main raw-material of mobile and computer? a) Iron b) Plastic c) Cupper d) Silicon (39) What is the population according to population census of 2011? a) about 14 crore b) about 15 crore c) about 16 crore d) abut 17 crore (40) How can we get new source of resource? a) Learning about science b) Digging soil c) Getting foreign help d) Inventing new technology 2. Fill in the blanks: 110=10 a) Animals cannot produce it’s own _________. b) Oxygen produces ________ after breaking the foods that we eat. c) ________ of air is used during producing urea. d) _________ energy is used to run bicycle. e) Playing songs loudly causes ________ pollution. f) Tube-well water is generally ________. g) Sun is a large _________. h) _________ motion occurs day and night in the earth. i) From six to ten years old is known as ________.

J) Virus of Rheumatic fever is _______.