Annual Exam Model Question Paper 4 - 2019 - 2020

9th Standard

Reg.No. :
•
•
•
•
•
•

Science

Time : 02:45:00 Hrs
Total Marks : 75

Part I

Choose the most suitable answer from the given four alternatives and write the option code with the corresponding answer.

12 x 1 = 12
1. Many of the ancient system of measurement were based on the dimensions of___________.

(a)

Plants

(b)

Animals

(c)

Human body

(d)

God

2. A car is being driven at a speed of 20 ms-1 when brakes are applied to bring it to rest in 5 s. The decelaration produced in this case will be

(a)

+4 ms-2

(b)

‒4 ms-2

(c)

‒0.25 ms-2

(d)

+0.25 ms-2

3. The point at which the rays are converged or diverged by a mirror is _____________________

(a)

pole

(b)

principal focus

(c)

principal axis

(d)

centre of curvature

4. The correct electronic configuration of potassium is

(a)

2,8,9

(b)

2,8,1

(c)

2,8,8,1

(d)

2,8,8,3

5. Which vitamin causes bow legs?

(a)

Vitamin A

(b)

Vitamin C

(c)

Vitamin D

(d)

Vitamin E

6. Data processing involves________ steps

(a)

seven

(b)

four

(c)

six

(d)

eight

7. If in the circuit, power dissipation is 150 W, then R - is___________

(a)

2$\Omega$

(b)

6$\Omega$

(c)

5$\Omega$

(d)

4$\Omega$

8. Elements in the modern periodic table are arranged in__________ groups and __________ periods.

(a)

7,18

(b)

18,7

(c)

17,8

(d)

8, 17

9. To prevent the entry of food into the trachea, the opening is guarded by__________

(a)

epiglottis

(b)

glottis

(c)

hard palate

(d)

soft palate

10. A Sonar device on a submarine send out a signal and receives an echo 5 seconds later. Calculate the speed of sound it water if the distance of the object from the submarine is 3500 m

(a)

1440 rns-1

(b)

1460 rns-1

(c)

1400 ms-1

(d)

1550 rns-1

11. Which one of the following is an Italian species of honey bee?

(a)

Apis mellifera

(b)

Apis dorsata

(c)

Apis florae

(d)

Apis cerana

(a)

Mother Board

(b)

SMPS

(c)

RAM

(d)

Mouse

13. Part II

Answer any 7 questions. Question no. 22 is compulsory.

7 x 2 = 14
14. What is the full form of SI system?

15. What happens when a ray of light travels from rarer medium to the denser medium?

16. Is air a pure substance or Mixture? Justify

17. For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?

18. Which fluid fills in the body cavity?

19. A doctor advices an adolescent girl who is suffering from anaemia to include more of leafy vegetables and dates in her diet. Why so?

20. Write a note on ENIAC.

21. Differentiate Collenchyma and Sclerenchyma

22. Differentiate
a. Exotic breed and Indigenous breed
b. Pollen and Nectar
c. Shrimp and Prawn
d. Fin fish and Shell fish
e. Farmyard manure and Sheep manure

23. Define the Bacteriophages

24. Part III

Answer any 7 questions. Question no. 32 is compulsory.

7 x 4 = 28
25. What is the measuring unit of the thickness of a plastic carry bag?

26. The diagram shows the position of a ball a it rolls down a track - the ball took 0.5s sec to roll from one position to other.
(a) State where the motion of the ball is uniform or non-uniform motion.
(b) What is the distance travelled by the ball in 2.5 s?
(c) Find the average velocity of the ball from. A to F.

27. State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

28. Define quantum numbers

29. There are 3 plants A, Band C. The flowers of A open their petals in bright light during the day but close them when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but close them during the day w..hen there is bright light. The leaves of plant C fold up and droop when touched when fingers or any other solid object.
(a) Name the phenomenon shown by the flowers of plant A and B.
(b) Name one flower each which behaves like the flowers of plant A and B.
(c) Name the phenomenon exhibited by the leaves of plant C.
(d) Name a plant whose leaves behave like those of plant C.

30. Comment on the aquatic and terrestrial habits of amphibians.

31. A metal ball of heat capacity 50J/0C loses 2000 J of heat. By how much will its temperature fall?

32. State Ohm’s law.

33. Draw magnetic field lines around a bar magnet

34. What do you mean by Operating System? How it Works?

35. Part IV

3 x 7 = 21
1. Explain simple epithelium and its types.

2. Describe the alimentary canal of man

1. List out the advantages of farm ponds.

2. Some human diseases are transmitted only when the blood of a patient comes in close contact with the blood of a healthy person. In one such disease, there is a progressive decrease in WBC of the patient.
a. Name the disease and its causative agent.
b. Name the type of WBC affected during infection.
c. How does the blood of a patient come in contact with blood of healthy patient?
d. Suggest three methods that help in preventing such infection.

1. Name the instrument used to check the purity of milk. What is its principle? How does it work? where it is used?

2. State any five features of modern periodic table.