1

NEW ERA SENIOR SECONDARY SCHOOL, NIZAMPURA, VADODARA - 2

SUMMER VACATION ASSIGNMENT 2015

STANDARD IX

� Assignment to be submitted on 08.06.2015

� To be submitted on foolscap ruled paper.

English:

1) Read the newspaper every day.

a) Write 2 articles on your own, on any topic of your choice eg. Sports, politics etc.

2) Read a good novel

a) Write at least 2 good character sketches of the novel

b) Write at least 2 good stage sketches of the novel

3) Read the rapid reader ‘Three men in a boat’

a) Write any 2 funny incidents of the story

Mathematics:

1. Express in decimal: 3 1/40 , 5/9 ,12/7 , 11/13 .

__ _ _

2. Convert in p/q form: 4.15 , 19.46 , 3.7 , 2.007 .

__ _ ___

3. Represent on a number line: --√12 , 2 +√ 3 , √4.7 .

__

4. Using successive magnification express 5.62 on the number line, till three decimal places.

5. Simplify: (i) √5 – 2 + √5 + 2 (ii) 4 + √6 -- 4 – √6

√5 + 2 √ 5 – 2 4 -- √6 4 + √6

6. If 5 + 4 √ 3 = a – b √ 3 , find a & b .

7 + 2 √3

7. Find the values of x +1/x , x2 +1/x

2 for the given values of x .

(i) x = 3 -- √5 (ii) x = 2—3 √ 5

8. Find the values of x --1/x , x2 --1/x

2 for x = 5 + 4 √ 3 .

9. Find the values of x +1/x , x2 +1/x

2 &x

4 + 1/x

4 for x= 1 + 5 √ 2

10. Simplify and evaluate:

(i) (122 + 5

2 )

1/2 (ii) 23

5/8 X 23

15/8 X 23

-11/8 (iii) (1

3+ 2

3 +3

3 )

1/2

(iv) 163/4

X 167/4

X 1614/4

(v) [ 64 1/3

]1/2

÷ [ 82/3

] 1/2

(vi) [ 62 + 8

2 ]

1/2 X [ 4

2 X 3

2

]1/2

(vii ) (1024 ) -3/10

(viii) [ 64X 36 / 81 ] –3/2

(ix) { √2/ 8 } 8 ÷ {√2 / 8}

12 (x) { 36

3/2 x 512

5/3 } ÷ { 16

5/4 x 8

4/3 }

2

11. Find x if :

(i) ( 0.008 ) 2/3

= ( 2/ 10 )x (ii) 3

x—2 = 243 (iii) (√7 )

3 X ( 7 )

5/3 = 7

x

( iv) 25x

÷ 2x

= 220

(v) 5x—2

. 3 2y—3

=675 (vi) 2 x—7

. 5 y—4

= 1250

12. Find 10 rational numbers between √3 & √ 5.

13. Find 5 irrational numbers between 2/5 & 2/7 .

14. Write five algebraic expressions which are polynomials.

15. Write five algebraic expressions which are not polynomials.

Science:

Physics: (Only for section B and C)

1 Mark questions

1. Define the term displacement. Is it a vector quantity or a scalar quantity?

2. Define the term distance. Is it a vector quantity or a scalar quantity?

3. The displacement of a body can never be greater than the distance covered by a body.

Is the statement true or false?

4. Can a body have zero velocity and still acceleration? Give example.

5. What is the nature of distance time graph for uniform motion of an object?

6. What is the acceleration of a freely falling body?

7. What is the acceleration of a body moving with uniform velocity?

8. Give two examples of vector quantities.

2 Marks questions

1. An object is moving up an inclined plane. Its velocity changes from 15m/s to 10m/s in

two seconds. What is its acceleration?

2. A body covered a distance of x metre along a semi-circular path. Calculate the

magnitude of displacement of the body, and the ratio of distance to displacement?

3. A particle moving with an initial velocity of 5m/s is subjected to a

uniform acceleration of -2.5m/s2.Find the displacement in the next 4 sec.

4. A car covers 30km at a uniform speed of 30km/hr. what should be its speed for the

next 90km if the average speed for the entire journey is 60km/h?

5. A boy runs for 10 min. at a uniform speed of 9km/h. At what speed should he run for

the next 20 min. so that the average speed comes 12km/hr?

6. A particle was at rest from 9 a.m. It moved at a uniform speed 10km/hr from 9.30

a.m. to10 a.m. Find the average speed between (a) 9.00 a.m. and 10.00 a.m., (b) 9.15

a.m. and 10.00 a.m.

7. An insect moves along a circular path of radius 10 cm with constant speed. If it takes

1 min. to move from a point on the path to the diametrically opposite point, find (a)

the distance covered, (b) The speed, (c) the displacement, (d) average velocity.

8. A particle with a velocity of 2m/s at t=0 moves along a straight line with a

constant acceleration of 0.2m/s2. Find the displacement of the particle in 10s?

9. A particle is pushed along a horizontal surface in such a way that it starts with a

velocity of 12m/s. Its velocity decreases at a uniform rate of 0.5m/s2. (a) Find

the time it will take to come to rest.

3

Chemistry:

Q.1 What happens?

a) To the boiling point of water on adding NaCl.

b) When ammonium chloride is heated strongly.

c) When CO2 is stored under high pressure.

d) When you pour some acetone (nail polish remover) on your palm.

e) To the freezing point of water on adding sugar to it.

Q.2 Give reasons:

a) All liquids have different boiling points.

b) In humid environment clothes takes more time to dry.

c) Ice floats on water.

d) The density of water is low as compared to honey.

e) Evaporation is faster when water is placed in a trough than in a tumbler.

Q.3 A sample of water under study was found to boil at 102 o C at atmospheric pressure.

Is the water pure? Will this water freeze at 0o C? Comment.

Q.4 A student heats a beaker containing ice and water. He measures the temperature of

the content of the beaker as a function of time. which of the following would

correctly represent the result?

Q. 5 Alka was making tea in a kettle. She felt intense heat from the puff of steam gushing out

the spout of the kettle. She wondered whether the temperature of the steam was higher

than that of the water boiling in the kettle .Water as steam may cause severe

burns.Explain.

Q.6 Study the figure and answer the following questions.

a) Name the processes marked as a,b,c,d,e,&f.

b) What changes do you expect on increasing pressure and lowering the temperature of a gas?

c) What is sublimation?

4

Biology:

1. How do substances like carbon dioxide and water move in and out of the cell?

2. How is endoplasmic reticulum important for membrane biogenesis?

3. What is endocytosis?

4. What is the difference between chromosomes, chromatin and gene

5. What is plasmolysis?

6. What is the function of contractile vacuoles? Where are these found?

7. What are genes? Which chemical forms the genes? Give their functions.

8. Give reasons

a) Lysosomes are called suicidal bags.

b) Plant cells have few large vacuoles as compared to the many small vacuoles in

animal cells.

c)Mitochondria is called power house of the cell.

d) Plasma membrane is called a selectively permeable membrane.

e) The cell is called structural and functional unit of life.

f) ATP is called the energy currency of the cell.

9. Differentiate between:

a) Chloroplast andchromoplast

b) RER and SER

c) Endosmosis and exosmosis

d) Eukaryotic and prokaryotic cell

e) Cisternae and cristae

f) Nucleus and nucleolus

10. What will happen when—

a) Raisins are kept in water

b) Rheo leaves are boiled and then a drop of concentrated sugar solution is added

on the leaves

c) Plasma membrane of the cell breaks down

d) Golgi apparatus is removed from the cell

e) Excess amount of fertilizer is added to green grass lawn.

f) Salt is added to cut pieces of raw mango.

g) Shelled raw egg and de shelled boiled egg are placed in water

Social Science:

Answer the following questions:

a) What are the various forms of government?

b) What types of governments do the following countries have?

Pakistan, Saudi Arabia, Mexico, Zimbabwe, China, Poland, Chile, India.

-Mention any two features of governments in each of the above countries.

-List the common features if any.

2. Mark the following on a physical map of India:

i) Mountain peaks: K2, Kanchenjungha, Nanda Devi, Anaimudi, Nanga Parbat,

ii) Hills: Garo, Khasi, Jaintia, Naga, Mizo, Nilgiri

iii) Passes: Bombdi La, Shipki La

iv) Mountain Ranges: Karakoram. Zaskar, Shivalik, Aravalli, Vindhya, Satpura, Western

Ghats and Eastern Ghats

v) Plateaus: Deccan, Chhotanagpur, Malwa

vi) Coastal Plains: Coromondal, Northern Circars, Malabar, Konkan

5

Sanskrit:

Gujarati:

Hindi: