#### SECOND SUMMATIVE EXAM 2018

9th Standard

Reg.No. :
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Science

Time : 02:30:00 Hrs
Total Marks : 60

5 x 1 = 5
1. SI unit of temperature is

(a)

fahrenheit

(b)

joule

(c)

celsius

(d)

kelvin

2. Electroplating is an example for

(a)

heating effect

(b)

chemical effect

(c)

flowing effect

(d)

magnetic effect

3. Bond formed between a metal and non-metal atom is usually____________

(a)

ionic bond

(b)

covalent bond

(c)

co-ordinate bond

(d)

covalent bond

4. Since metal carbonate and metal bicarbonate are basic they react with acids to give salt and water with the liberation of__________

(a)

NO2

(b)

SO2

(c)

CO2

(d)

SO2

5. The tissue composed of living thin walled polyhedral cell is

(a)

Parenchyma

(b)

Collenchyma

(c)

Sclerenchyma

(d)

None of above

6. II. Fill in the flanks

3 x 1 = 3
7. The direction opposite to the movement of electron  is called_______current.

()

conventional

8. No force acts in a current carrying conductor when it is ________o the magnetic field.

()

parallel

9. __________tissues provides mechanical support to organs

()

Compound epithelium]

10. III. True or False

2 x 1 = 2
11. A generator converts mechanical energy into electrical energy

(a) True
(b) False
12. Vessels are found in collenchyma.

(a) True
(b) False
13. IV. Answer any 15 questions in the following :

15 x 2 = 30
14. How much heat energy is required to change 2 kg of ice at 0ºC into water at 20ºC? (Specific latent heat of fusion of water = 3,34,000J/kg, Specific heat capacity of water = 4200JKg-1K-1).

15. What is the effective resistance across the terminals a and b of the arrangement of resistors?

16. List the main parts of an electric motor.

17. Differentiate step up and step down transformer.

18. State modern periodic law.

19. Name the components of xylem and phloem.

1. Complete the missing terms in the following table:

 Process Phase I Phase II Sublimation Vapour Solidification Solid Solid Liquid Freezing Liquid Condensation Liquid
2. Complete the following table referring the modern periodic table:

 Period number Total no of elements Elements Total no of elements in From To s-block p-block d-block f-block 1 2 3 4 5 6 7
20. Mark the correct choice as:
(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.
Assertion: Food can be cooked faster in copper bottom vessels.
Reason: Copper is the best conductor of heat.

21. Statement: Elements in a group generally possess similar properties but elements along a period have different properties.
Reason: The difference in electronic configuration makes the element differ in their chemical properties along a period.
a) Statement is true and reason explains the statement.
b) Statement is false but the reason is correct.

22. Assertion: Non-striated muscles are said to be voluntary in nature.
Reason: Non-striated muscles are under the control of our will.

23. Ice is kept in a double-walled container. Why?

24. Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5A.

25. State an important advantage of ac over dc.

26. Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer. While coil B is connected to a battery through a key. What would happen if
(i) a current is passed through coil B by plugging the key?
(ii) the current is stopped by removing the plug from the key?

27. What are the limitations of Mendeleev's periodic table?

28. Identify the following reactions as oxidation or reduction
a. Na $\rightarrow$Na+ + e-.
b.Fe3+ + 2 e-$\rightarrow$ Fe+

29. Find the odd one out: Lemon juice, Tomato juice, House hold ammonia, Coffee

30. Give the sequence of the events occurring during prophase of mitosis.

31. Complete the crossword using the clues
Left to right:

1) pair of electrons which do not take part in bond formation
2) reaction in which both oxidation and reduction takes place
3) rule which says about eight electrons in outermost shell
Top to bottom:
a) bond formed by transfer of electrons from one atom to another
b) ion with positive charge
c) energy required to remove the most loosely bound electron from an isolated gaseous atom of an element
d) loss of electron
(lonepair, redox, octet, ionic, cation, ionisation,oxidation)

32. Identify the following parts:
1. It conducts food from pharynx to stomach by peristalsis-
2. Finger-like projections which enhances the absorbing capacity of small intestine-
3. The bunch of capillaries inside the Bowman’s capsule-
4. Thin muscular tubes which carry urine from kidney to urinary bladder-
5. Small sac-like muscular structures that encloses testes-

33. Match the parts of the given figure with the correct option.

 1 2 3 4 5 a.Fallopian tube Oviduct Uterus Cervix Vagina b.Oviduct Cervix Vagina Ovary Vas deferens c.Ovary Oviduct Uterus Vagina Cervix d.Fallopian tube Ovary Cervix Uterus Vagina
34. Name the parts of a computer

35. V. Answer all the questions

4x 5 = 20
1. What are the changes of state in water? Explain.

2. Draw a circuit with a 2$\Omega$ and 5$\Omega$ resistors in series. Connect another 3$\Omega$ resistor parallel to the above connection.

1. Explain two types of transformer.

2. State any five features of modern periodic table.

1. Find the oxidation number of the elements in the following compounds.
a. C in CO2
b. Mn in MnSO4
c. N in HNO3

2. Why does distilled water not conduct electricity whereas rain water does?

1. Identify the following relationship
Cuboidal : Epithelial
Cardiac :_____________
Granulocytes : _______________
Osteocytes :_______________

2. Describe the alimentary canal of man