#### Annual Exam Model Question Paper 3 - 2019 - 2020

9th Standard

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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. ____________is the fundamental quantity.

(a)

Length

(b)

Area

(c)

Volume

(d)

Density

2. Which one of the following is most likely not a case of uniform circular motion?

(a)

Motion of the Earth around the Sun

(b)

Motion of a toy train on a circular track

(c)

Motion of a racing car on a circular track.

(d)

Motion of hours hand on the dial of the clock

3. According _______________________to of light, angle of incidence is equal to angle of reflection

(a)

refraction

(b)

dispersion

(c)

reflection

(d)

total internal reflection

4. Change in the number of neutrons in an atom changes it to

(a)

an ion

(b)

an isotope

(c)

an isobar

(d)

another element

5. Identify the mineral which regulates nerve and muscles activity?

(a)

Iron

(b)

Iodine

(c)

Sodium

(d)

Potassium

6. _________ belongs to the generation IV of the computer

(a)

Microprocessor

(b)

Artificial intelligence

(c)

Transistor

(d)

Vaccum Tubes

7. Assertion (A) Electric current will not flow between two charged bodies when connected if their charges are same.
Reason (R) Current is the rate of flow of charge.

(a)

If both assertion and reason are true and reason is the correct explanation of assertion

(b)

If both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

If assertion is true but reason is false

(d)

If assertion is false but reason is true.

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. Which of the following is not a salivary gland?

(a)

Sublingual

(b)

Lachrymal

(c)

Submaxillary

(d)

Parotid

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 of the following is an high milk yielding variety of cow?

(a)

Holstein- Friesan

(b)

Dorset

(c)

Sahiwal

(d)

Red Sindhi

12. Find out the Paid and Proprietary software from the given list

(a)

Windows

(b)

MAC OS

(c)

(d)

All the above

13. Part II

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

7 x 2 = 14
14. Convert : 300 K into Celsius scale,

15. Write the mirror equation.

16. 1. Let us take two glass tumblers and fill one with cold water and the other with hot water.
2. Now add a drop of red ink into each of the glasses but do not stir. Observe.
3. In which glass does water turn red faster?
4. Does the rate of mixing change with temperature? What do you conclude?

17. Clues:
Down:
1. Helium Nuclei (Particle)
2. Positive Charge mass at the core of the atom
3. An atom whose valency is zero
4. One or two electrons in the outermost shell of atoms of elements are called as ______________ electrons.
5. $_{ 6 }^{ 14 }{ C }$is used for carbon dating
6. Discovery of neutron

Across:
1. Electrons present in the outermost shell
2. This pair of atoms$_{ 20 }^{ 40 }{ C }a,\quad _{ 18 }^{ 40 }{ Ar }$ are ____
3. An atom that does not have neutron
4. Scattering of α particles in the gold foil experiment

18. Which unique feature is seen in Echinoderms?

20. Write a note on ENIAC.

21. What is the role of RBC?

22. Define
a. Pisiculture
b. Apiculture
c. Vermiculture
d. Mariculture
e. Floriculture
f. Compost
g. Pomiculture
h. Pinning

23. Define the Bacteriophages

24. Part III

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

7 x 4 = 28
25. Differentiate mass and weight

26. How do we separate cream from milk?

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

28. Illustrate the law of multiple proportion by an example.

29. An organism A which cannot move from one place to another makes a simple food B from the substances C and D available in the environment. This food is made in the presence of green coloured substance E present in organs F in the presence of light energy in a process called G Some of the simple food B also gets converted into a complex food H for storage purposes. This food gives blue-black colour with iodine solution?
(a) What is (i) organism A (ii) food B and food H?
(b) What are C and D?
(c) Name (i) green coloured substance E and organ F.
(d) What is the process G?

30. How is the reproductive characters of mammals different from those of Aves?

31. Calculate the amount of heat required to convert 200g of ice at 00C into water at 00C Specific latent heat of fusion of ice = 336 Jg-1

32. How many electrons will be there in one coulomb of charge?

33. Draw magnetic field lines around a bar magnet

34. What is Hardware and Software?

35. Part IV

3 x 7 = 21
1. State any five features of modern periodic table.

2. Explain simple epithelium and its types.

1. Explain the structure of kidney and the steps involved in the formation of urine

2. Explain the working of Hydraulic press. Why they are called as force multipliers.

1. What is the role played by the earthworms to improve the soil fertility? How does it adapt to light and temperature

2. Name the causative agent of typhoid in human. How does the pathogen gain entry into the human body? Write the diagnostic symptoms and mention the organ that is affected in severe cases.