IX HINDI

 

  IX - SST

Prepare various maps of india showing the geographical features. Use outline map of India /Indian subcontinent . paste them on a4 sheets and present in file. Use geography text book for information.
 

ENGLISH

• Read, any one of the following novels:

1. Gulliver’s Travels by Jonathan Swift.
2. Three men in a boat by Jerome K Jerome
3 Power point presentations ( Any one)
1. Tenses
2. Reported speech
3. Active passive voice.
4 Speech (Write and study)
1. Female illiteracy in India.
2. Pollution and its solution (For Delhi).
5 Daily news reading.

                                                               

ASSIGNMENT OF CLASS IX
MATTER IN OUR SURROUNDINGS
I 1 Mark each
a) What is the space occupied by matter called?
b) A substance has a definite shape and volume. What is it called?
c) What is dry ice?
d) Define boiling point of a liquid.
e) What happens when Ammonium chloride is heated?
f) Write any one characteristic of matter
II 2 Marks each
a) Clothes dry fast on a windy day, why?
b) Define latent heat of fusion.
c) What is evaporation?
d) Why do we sweat more in a humid day?
e) Why is nitrogen called a gas? Give two reasons.
f) Explain the terms rigidity and fluidity.
g) Why is ice at 273 K more effective in cooling than water at same temperature?
III 3 Marks each
a) What type of clothes should we wear in summer?
b) Write three differences between boiling and evaporation.
c) Ordinary water boils at 1000C. Can it be made boil at 950C or 1050C?
d) Give reasons for the followings
1) Gases fill the entire space available to it.
2) A wooden table should be called a solid
3) A liquid is considered as a fluid.
IV 5 Marks each
a) What are the differences between a gas and a vapour? Differentiate between evaporation and boiling.
b) State four factors which effect the rate of evaporation.
c) Compare in a tabular form the properties of solids, liquids and gases with respect to
Shape, Volume, Diffusion, Fluidity or rigidity and compressibility.

 

CLASS – IX         CH : MOTION

Q1. Study the given graph and answer the following questions.                                                                                3

                        t (s)

Which part of the graph shows accelerated motion ?

Which part of the graph shows retarded motion ?

(iii)Calculate the distance travelled by the body in first 4 seconds of journey graphically ?

 

Q2. State reason for the following :                                                                                                                                 3

(a) All the cars are provided with seat belts .

(b) It is dangerous to move out of a moving bus

(c) Road accidents at high speeds are very much worse than accidents at low speeds.         

Q3. A stone is thrown vertically upwards with a velocity of 40 m/s and is caught back. Taking g = 10 m/s2, calculate the maximum height reached by the stone. What is the net displacement and total distance covered by the stone ?      3

 Q4. (a) Differentiate between uniform linear and uniform circular motion.

(b) Write any four examples of uniform circular motion.

(c) Is uniform circular motion accelerated motion ? 2+2+1+5 

Q5.(a) Differentiate between speed and velocity.  

(b) When is a body said to have uniform velocity ?  

(c) How can we describe the position of an object ? Illustrate with suitable example. 2+1+2 =5

Q6. A truck is moving on a straight road with uniform acceleration. The following table gives the speed of the truck at various instants of time.

Speed (m/s)

 5

 10

 15

 20

 25

 30

 

 Time (s)

 0

 10

 20

 30

 40

 50

 

 Draw the speed-time graph by choosing a convenient scale. Determine from it : (i) the acceleration of truck (ii) the distance travelled by the truck in 50 seconds. 3

Q7. A large truck and a mini bus both moving with a velocity of magnitude V have a head on collision and both of them come to a half after that. If the collision lasts for 1 second.

 (a) Which vehicle experiences the greater force of impact ?

(b) Which vehicle experiences the greater change in momentum ?

 (c) Which vehicle experiences the greater acceleration ?     3

 

Q8. (a) Why are the wheels of vehicle provided with mud guards ?

(b) A cricket player lowers his hand while catching a ball. Why ?

 (c) Why a glass pare of a window is shattered when a flying pebble hits it ?  3

 

 

Q9. A stone is dropped from a height of 20 m.

(a) How long will it take to reach the ground ?

(b) What will be its speed when it hits the ground ? (g=10 m/s2).      3

Q10. Account for the following :

(a) Name the quantity which is measured by the area occupied below the velocity-time graph.

 (b) An object is moving in a certain direction with an acceleration in the perpendicular directions.

 (c) Under what condition is the magnitude of average velocity of an object equal to its average speed ?

(d) An example of uniformly accelerated motion.

 (e) A body is moving along a circular path of radius (R). What will be the distance and displacement of the body when it completes half revolution ? 5

Q11. Account for the following :

 (a) What is the shape of the path of a body when it is in uniform motion ?

(b) Give one example of non-uniform motion.

(c) Two cars A and B have their x-t graphs as shown in figure. Which has greater velocity ?

 

(d) What is the quantity which is measured by the area occupied below the velocity-time graph?

(e) A body is moving with a velocity of 10 m/s. If the motion is uniform, what will be the velocity after 10 s ?        5

Q12. Define distance and displacement. A body covers one complete revolution around a circular park of circumference 176 m in 4 minutes. Find the displacement of the body after 6 minutes.            3

 

Q13. When a fast moving horse stops suddenly a careless rider falls in the forward direction. Give reason for it. 3

Q14. (a) Derive second equation of motion graphically where the symbols have their usual meanings.

(b) A car accelerates uniformly from 18 km/h to 36 km/h in 5 seconds. Calculate the acceleration and the distance covered by the car in that time. 5

Q15. Study the graph and answer the following :

                  Time (in s)

What type of motion is represented by OA, AB and BC ?

(ii) Find positive and negative accelerations of the body. (iii) Find the distance travelled by the body from A to B.    5

Q16. Study the speed time graph of a car along side and answer the following questions.

(a) What type of motion is represented by OA ?

(b) Find acceleration from B to C.

 (c) Calculate the distance covered by the body from A to B.    3

Q17. A passenger in a moving car slips to one side of the seat when the car takes a sharp turn. Give reason for it. 3

Q18. A constant force of friction of 50 N is acting on a body of mass 200 kg moving initially with a speed of 15 m/s. How long does the body take to stop ? What distance will it cover before coming to rest ?  3

Q19. (a) Define uniform circular motion.  (b) Ram goes for a morning walk in a circular park daily. He completes one revolution of the park in 4 minutes. Find his speed if the diameter of the park is 420 m.

(c) Draw velocity-time graph for uniform motion along a straight line. How can you find distance covered by a body from this graph ?           5

Q20. (a) Define inertia. You are provided with three bodies made up of wood, rubber and iron of same shape and size. Which one of them will have greater inertia. Explain it. 

(b) When a striker hits the bottom of the pile of coins placed at the c

Q21. (a) Define momentum. Write its S.I. unit.

(b) A car and a truck have same momentum. Whose velocity is more and why ?

(c) A bullet of mass 20 g moving with a speed of 500 m/s strikes a wooden block of mass 1 kg and gets embedded in it. Find the speed with which block moves along with the bullet ?       5

 

IX MATHS

1.      Simplify:                                                                                                                                                                                                                               

2.      Simplify                                                                                                                                                                                 

3.      Insert three rational numbers between and 1.                                                                                             

4.      Write in decimal form and state what kind of decimal expansion does it have ?                                               

5.      Let  a and b be rational and irrational numbers respectively.  Is a1b an irrational number ?  Justify your answer.                                                                                                                                      

6.      Represent  on the number line.                                                                                                    

7.      Find the values of a and b, if .                                                                                                                        

8.                                                                                                   

9.      Convert the following frequency distribution into a continuous grouped frequency table:

Class - Interval

Frequency

150 - 153

154 - 157

158 - 161

162 - 165

166 - 169

170 - 173

7

7

15

10

5

6

 In which intervals would 153.5 and 167.5 be included ?                                                             

10.  There are 100 students in a class. The mean height of the class is 150 cm. If the mean height of 60 boys is 170 cm., find the mean height of the girls in the class.                                                               

11.  The histogram given below shows the marks obtained by students in a test conducted during the remedial classes in the school :

        Description: q463e.eps

Using the above histogram make frequency table.  Also answers the following questions :

(a)  How many students obtained marks less than 40?

(b)  How many students obtained marks between 50 and more.                                                            

12.  The median of the following observations arranged in ascending order is 24.  Find x.

14, 18 x12, x14, 30, 34

Using the value of x, find the mean of the above data.                                                                           

13.  If a5 and b5, find the value of a21b215 ab.                                                    

14.  If find x21y2.                                                  

15.  Evaluate :

                                                                                                                                                         

16.  If  and a2b50, find the value of x.                                                                                                   4

17.  Thirty children were asked about the number of hours they watched TV programs in the previous week.  The results were found as follows :

p1, 6, 2, 3, 5, 12, 5, 8, 4, 8,

10, 3, 4, 12, 2, 8, 15, 1, 17, 6,

3, 2, 8, 5, 9, 6, 8, 7, 14, 12

(i)                 Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5-10.  Also draw histogram.

(ii)               How many children watched television for 15 or more hours a week ?                                              

18.  Draw a histogram and frequency polygon of the following distribution :                                       

Heights (in cm) :

150-153

153-156

156-159

159-162

162-165

165-168

Number of students

10

7

8

14

9

6

 BIOLOGY

Q1) What will happen if
(a) ribosomes are removed from the cell
(b).Golgi apparatus is removed from the cell.
©Plasma membrane ruptures
Q2) State the technical term for a medium which has exactly the same concentration as the cell? Why does the size of the cell remain the same when placed in such a solution?
Q3) Name the plastid which store starch, oils & protein granules
Q4) Mention any two functions of golgi apparatus
Q5) Explain your observation in the following with the reason involved in the process
a)Salt is applied to row mango pieces
b) Dried raisins are keptin water few hours
Q6) Differentiate between diffusion & osmosis .Write any 2 examples where a living organisms uses to absorb water
Q7) Write any 2 organelle s which contain their own genetic material?Draw a labeled diagram of prokaryotic cell
Q8) Name the cell organelle which is able to destroy a damaged cell?
Q9)Write the difference between prokaryotic and eukaryotic cell
Q10) Difference between plantcell and animal cell
Q11)Write the functions of the following organelles
a)plasma membrane
b)cytoplasm
c)endoplasmic reticulum
d)ribosomes
e)Golgi Apparatus
f)Mitochondria
g)lysosomes
h)plastids
i)nucleus
j)Vacuoles
k)cell wall
Q12)Draw a well labeled diagram of a plant cell
Q13)Draw a well labeled diagram of an animal cell
Q14)How does Amoeba obtain its food?
Q15)Why is cell called structural and functional unit of life
Q16)Why is the plasma membrane called the selectively permeable membrane?
Q17)Can you name the two organelles we have studied that contain their own genetic material?
Q18)If the organization of the cell is destroyed due to some physical or chemical influence,what will happen?
Q19)Why are lysosomes called suicidal bag of the cell
Q20)Where are proteins synthesized inside the cell?
Q21)Which organelle is known as the power house of the cell?Why
Q22)Multicellular organisms has greater capacity for survival than unicellular organisms.Why?
Q23)Why are plant cells more tough than animal cells ?
Q24) Which type of cell do not contain nucleus?
Q25)Is plasma living or dead
Q26)___________observed that the cork resembled the structure of honey comb consistint of several little compartment
 

HINDI

 

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