BAF Shaheen College Dhaka
Practice Half-Yearly Examination- 2020 Class- Nine (English Version)
Subject: Science
Time: 30 minutes Total Marks: 30
[N.B- Answer all the questions.Each question carries 1 marks.Block fully with ball point pen,the circle of the letter that stands for the correct/best answer in the
‘’Answer Sheet” for Multiple Choice Questions examination.]
1. What is mainly available in carrot?
a)Glucose b) Fructose c) Sucrose d) B-carotene 2. Fat soluble vitamin in body are----
i.A,D,E ii. A,B,C iii. A,D,K Which one is correct?
a) I & I b) I & iii c) ii & iii d) I, ii& iii
Read the passage below and answer the question no 3 and 4:
Rahima’s weight is 50 kg and her hight is 1.5 metre. She has got vomiting and diarrhoa from yesterday. Her weight has be- come 47 kg due to water loss.
3. Due to deficiency of essential element Rahima’s --- i.blood circulation is disturbed ii. Muscle become weak iii.salt remain balanced
Which is correct?
a) i & ii b) i & iii c) ii & iii d) i,ii& iii 4. What is the BMI of Rahima after coming sick?
a) 22.3 b) 20.9 c) 49.25 d) 44.75 5. Which vitamin can be found in cheese?
a) Thiamin b) Niacin c) Cobalamin d) Pyridoxin 6. Which one the main element of bone and teeth of animal?
a)Iron b) Calcium c) Phosphorus d)Potassium 7. Which one coagulate blood?
a) RBC b) Platelets c) WBC d) Lymphocyte 8.What is the percentage of water in blood plasma?
a)10% b)45% c)55% d)90%
9.What is the number of red blood cells in the blood every adult person in mm
a)4-5lakh b)4.5-5.5 lakh c)60-70lakh d)80-90lakh 10.Which blood group is called the universal receiver group?
a)A b)B c)AB d)O 11.What is the least distance of distinct vision?
a) 25 cm b) 5 cm c)10cm d)15cm 12. For convex lens it is applicable that-
i) Its power is positive
ii) middle part is thin and both the edges are thick iii) it converges parallel rays
Which one is correct?
a) I & ii b) I & iii c) ii & iii d) I, ii & iii 13. What is the unit of power of a lens?
a) s/m b)dioptre c) k d) pascal 14. What happens to light in lens?
a)reflection b)refraction c) polarization d) diffusion 15. How many laws of refraction of light are there?
a) 3 b)4 c) 5 d)2 16. Which one does helps us identify colors?
a) retina b) cornea c) iris d) cone cell 17. What is the unit of force?
a) Newton b) Pascal c) watt d) Joule
18. A force of 400N was applied to produce an acceleration of 10 ms-
2 . What is the mass?
a)20kg b) 30kg c)40kg d)50kg
19. What is the reason of accident while coming down from a running bus suddenly?
a) force b)velocity c)motion d)inertia 20. Force can-
i) change the direction of something ii) change velocity of something iii) mass of something
Which one is correct?
a) I & ii b)ii & iii c)I & iii d) i, ii & iii
21. What is the required temperature for preparing polythene?
a) 200 ̊ C b) 300 ̊ C c) 400 ̊ C d) 500 ̊ C
22. Which one is the monomer of PVC polymer?
a) Ethylene b) Vinyl choloride c) Urea d) Formaldehyde 23. What is the meaning of Greek word meros?
a) Particle b) Part c) Many d) Portion 24. Rubbers -
i) Upon heating they melt ii) react with ozone (O3)
iii) can be given any particular shape Which of the following is correct?
a) i, ii b) i, iii c) ii, iii d) i, ii, iii 25. Which of the following can affect wool fiber?
a) Virus b) Bacteria c) Fungi d) Dilute acid
26. Which of the following plant grow both in water and land?
a) Algae b) Bindweed c) Water nut d) Duckweed 27. In which temperature the density of water is highest?
a) 0 ̊ C b) 4 ̊ C c) 100 ̊ C d) 70 ̊ C 28. What is the percentage of fresh water in our earth surface?
a) 1% b) 2% c) 3% d) 4%
29. In which year Ramser convention was first held?
a) 1969 b) 1971 c) 1973 d) 1982 30. What type of fiber requires heckling?
a) Jute b)Wool c) Silk d) Linen
Sub code:127
