St. John’s E.M High School(Affiliated to the Central Board of Secondary Education, New Delhi)

Class: IX _____________________________________________________________________________________________

Stay Home Stay Fit

The exercises given in this Worksheet are

supposed to be done in a new notebook…..

DIGITAL CLASSES THROUGH VIDEOS AND RELATED

WORKSHEETS WILL BE CONTINUED UNTIL

FURTHER INFORMATION

St. John’s E.M High School(Affiliated to the Central Board of Secondary Education, New Delhi)

Vijayawada

Worksheet – 6, 2020-21 _____________________________________________________________________________________________

The exercises given in this Worksheet are

supposed to be done in a new notebook…..

DIGITAL CLASSES THROUGH VIDEOS AND RELATED

WORKSHEETS WILL BE CONTINUED UNTIL

FURTHER INFORMATION

St. John’s E.M High School

Date: 05-05-2020 _____________________________________________________________________________________________

The exercises given in this Worksheet are

supposed to be done in a new notebook…..

DIGITAL CLASSES THROUGH VIDEOS AND RELATED

WORKSHEETS WILL BE CONTINUED UNTIL

Now you know regular exercise has lots of health benefits for

children and young people. Copy the given poses and hold for 20

seconds. Relax.

Fill in the blanks with appropriate co- relative Conjunctions

1. "Could I come over at __________ three __________ four o'clock?" asked Joan.

2. The teacher refused to mark his work because his book was ______ torn ______ dirty.

3. I really need a holiday but __________ in Spain __________ France.

4. I'm going to fish tomorrow, __________ it rains __________ shines.

5. __________ did he borrow a lot of money from us, he __________ refused to pay

back a single cent.

6. The children at the centre can __________ hear __________ speak.

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

7. She employs a maid to do _________ the cooking _________ washing for her family.

8. We have enough spices for only one type of curry. We can cook __________ chicken

curry __________ mutton curry.

9. The boy is really talented. He __________ knows how to play the piano __________

can also compose music.

10. I do not like him. He is __________ rude __________ selfish.

11. We do not know __________ it's you __________ me who will have to do it.

12. Each class is to present __________ a drama __________ a song for the concert.

13. The invitation is for two persons, so __________ Jack __________ his wife can

attend the function.

14. We are waiting for the boys. __________ Roy __________ Joseph has come yet.

15. Alfred __________ got up late this morning __________ missed the train.

………………………………………………………………………………………………..

Chapter-2 POLYNOMIALS

Synopsis of Remainder theorem

………………………………………………………………………………………………..

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

PHYSICS : 8. Motion

Synopsis 4:

Equations of Motion:

1. v = u + at

2. s = ut + 1/2at²

3. v² - u² = 2as.

1. First Equation of Motion:

2. Second Equation of Motion:

s = ut + 1/2at²

u² = 2as.

First Equation of Motion:

Second Equation of Motion:

3. Third Equation of

EQUATIONS OF UNIFORMLY ACCELERATED MOTION:

First equation of motion:

Second equation of motion:

Third equation of motion:

I. Identify the variables and give their units:

1. s =

2. v =

3. u=

4. t =

5. a =

For example: v is final velocity, units: m/s

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

Third Equation of Motion:

Worksheet – 4

EQUATIONS OF UNIFORMLY ACCELERATED MOTION:

First equation of motion:� � � � ��

Second equation of motion:� � �� ��

��

Third equation of motion: � � � � ��

Identify the variables and give their units:

For example: v is final velocity, units: m/s

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

EQUATIONS OF UNIFORMLY ACCELERATED MOTION:

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

ANSWER THE FOLLOWING QUESTIONS AFTER GOING THROUGH

SYNOPSIS:

1. Derive the first equation of motion which gives the velocity acquired by a body in

time (t).

2. Deduce the relation between distance travelled by a body in time (t).

3. State the relation between velocity acquired by a body in travelling a distance(s).

Biology :

Le-5: Cell : The Fundamental Unit of Life

Synopsis :

1. Plasma/Cell membrane: This is the outermost covering of the cell that separates the

contents of the cell from its external environment. The plasma membrane allows or

permits the entry and exit of some materials in and out of the cell so the cell membrane

is called a selectively permeable membrane. Some substances like CO2 or O2 gases can

move across the cell membrane by a process called diffusion. The movement of water

molecules (liquid) through such a selectively permeable membrane is called osmosis.

Osmosis is the passage ot water from a region of high water concentration through a

semi-permeable membrane to a region of low water concentration. If the medium

surrounding the cell has a higher water concentration than the cell, the cell will gain

water by osmosis. Such a solution is known as hypotonic solution.

If the medium has exactly the same water concentration as the cell, there will be no

net movement of water across the cell membrane. Such a solution is known as isotonic

solution. If the medium has a lower water concentration then the cell will lose water by

osmosis. Such a solution is known as hypertonic solution.

The plasma membrane is flexible and is made up of organic molecules called lipids

and proteins. The flexibility of cell membrane also enables the cell to engulf in food

and other material from its external environment. Such process is known as

endocytosis. It is observed in Amoeba.

2. Cell wall (Protective wall): Plants cells, in addition to the plasma membrane have

another rigid outer covering called cell wall. The cell wall lies outside the plasma

membrane. The plant cell wall is mainly composed of cellulose. It is a complex

substance and provides structural strength to plant cells. When a living plant loses

water through osmosis there is shrinkage or contraction of contents of the cell away

from cell wall. This phenomenon is known as plasmolysis.

WORKSHEET (Home Task)

A. Choose the correct answer :

1. A cell will swell up if ( )

(a) The concentration of water molecules in the cell is higher than the concentration of

water molecules in the surrounding medium.

(b) The concentration of water molecules in the surrounding medium is higher than

the concentration of water molecules in the cell.

(c) The concentration of water molecules is same in the cell and in the surrounding

medium

(d) The concentration of water molecules does not matter.

2. Which of the following statement marks as a difference between plant cell and animal

cell? ( )

(a) Plant cells have cell wall which animal cells do not.

(b) Plant cells do not have vacuole while animal cells do have.

(c) Plant cells have only cell membrane while animal cells have both cell wall as well

as cell membrane.

(d) Plant cells have more plastids while animal cells have few plastids.

3. The process of plasmolysis in plant cell is defined as: ( )

(a) Breakdown of plasma membrane in hypotonic solution.

(b) Shrinkage of cytoplasm in hypertonic medium.

(c) Shrinkage of Nucleoplasm. (d) None of these.

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

4. Cell is the structural and functional unit of life. The word cell is derived from the Latin

word ‘cellula’ which means “a little room”. Can you name the scientist who coined the

term cell? ( )

(a) Robert Hooke (b) Anton Von Leeuwenhoek

(c) Robert Brown (d) Ernst Haeckel

5. Osmosis is a process by which molecules of a solvent tend to pass through a

semipermeable membrane from a less concentrated solution into a more concentrated

one. Can you pick out the option among the following which does not belong to this

process? ( )

(a) The movement of water across a semipermeable membrane is affected by the

amount of substances dissolved in it.

(b) Membranes are made of organic molecules such as proteins and lipids.

(c) Molecules soluble in organic solvents can easily pass through the membrane.

(d) Plasma membranes contain chitin sugar in plants.

6. Viruses lack any type of membranes. ( )

A .True B. False

7. The barrier between the protoplasm and the other environment in an animal cells ( )

a) Cell wall b) Nuclear membrane

c) Tonoplast d) Plasma membrane

8. We generally mount the material in the slide ( )

a. In the centre of slide b. On the right side of slide

c. On the left side of slide d. Both (b) and (c)

……………………………………..……………………………………………………….

Civics- 2 What is Democracy why Democracy

PART 4 SYNOPSIS

WHY DEMOCRACY?

Points Against

There has been criticism of democracy by various people. The charges are that

• It creates instability by changing its leaders frequently.

• Democracy is about power play and political competition. There is no scope for

morality.

• So many people have to be consulted before any issue is solved. It leads to delay.

• Elected leaders do not know the best interest of the people.

• It leads to corruption for it is based on electoral corruption.

• Ordinary people do not know what is good for them, so decision making should not

be left to them.

Arguments for Democracy:

• Democratic government is a more accountable form of government.

• Democracy improves the quality of decision making.

• Democracy provides a method to deal with differences and conflicts.

• Democracy enhances the dignity of citizens.

• It allows us to correct its own mistakes.

Broader meaning of Democracy :

Democratic ideas can be practised in various decision-making processes. In broader sense

no country can be completely democratic, The features of democracy are only minimum

conditions. A lot can be done towards achieving real democracy.

Work sheet

Choose the correct answer :

1. _____________ leads to corruption

a.democracy b.monarchy c. dictatorship d.undemocracy

2. Elected leaders do not know the best interest of the _____________

a.leaders b.country c.president d.people

3. Democracy _____________ the dignity of citizens

a.decrease b.enhances c.leads d.ignores

Fill in the blanks :

1. Democracy improves the quality of _____________

2. Democracy creates _____________ by changing its leaders frequently

3. Democracy provide methods to solve _____________

Answer the following questions :

1. Majority of the people support democracy .why?

2. Corruption is less in undemocratic countries. Explain.

3. Write your own words about democracy.

THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE

BELOW PRACTICE QUESTIONS:

English Key :

1. whenever 2. where 3. If 4. Unless 5. whether

6. though 7. as 8. so that 9. so 10. lest

11. After 12.because 13. Whose 14.until 15. As soon as

Science Key : MOTION Worksheet – 3

1. B

2. C

3. A

4. A

5. A

6. B

7. a) �

� b)

�

8. (i) A body has a uniform acceleration if its velocity increases by equal amounts in

equal intervals of time. For eg:- A freely falling object under the influence of gravity

or a car going around a circular track with uniform velocity

(ii) A body has a non-uniform acceleration if its velocity increases by unequal

amounts in equal intervals of time for eg: A car driving by while applying brakes

frequently or a roller coaster ride.

9. (a) Instantaneous velocity: The velocity of an object under motion at a specific point

of time.

(b) Negative acceleration: If the velocity of a body increases, the acceleration is

positive, and if the velocity of a body decreases, the acceleration is negative.

Negative acceleration is also called as retardation or deceleration.

Social Key :

CHOOSE THE CORRECT ANSWERS

1. A[2015]

2. C[RUSSIAN MINORITY]

3. B[1980]

FILL IN THE BLANKS

1.ZANU PF PARTY

2.ROBERT MUGABE

3.INDIGENOUS FIJI

The following are the links of NCERT text books .

Click on them to view the lessons

CLASS IX MATHS :

Polynomials : http://ncert.nic.in/textbook/textbook.htm?iemh1=2-15

CLASS IX SCIENCE :

Ch 8 : Motion : http://ncert.nic.in/textbook/textbook.htm?iesc1=8-15

IX - Bio - Chapter 5 : THE FUNDAMENTAL UNIT OF LIFE

http://ncert.nic.in/textbook/textbook.htm?iesc1=5-15