ST. XAVIER’S SCHOOLS- CHANDIGARH, PANCHKULA, MOHALI, ZIRAKPUR

CLASS- VI ENGLISH WORKSHEET-8

PRESENT TENSE (PERFECT AND PERFECT CONTINUOUS)

PRESENT PERFECT TENSE

The present perfect tense is used to show an action that has just been completed.

Reena has just finished her food.

It is used to show an action which started in the past and is still continuing.

The monument has stood here for more than a hundred years.

It expresses actions which took place in the past but the results of which we can see

or feel in the present time.

My uncle has got a teaching experience of three years.

It also shows past events, the time for which is not mentioned.

They have known each other for years.

Form of Present Perfect Tense

The present perfect tense is expressed thus: have/has + past participle.

She has eaten the apple. (has + eaten- past participle)

EXERCISE: 1

Fill in the blanks with the present perfect tense form of the verbs given in the brackets.

1. The petrol prices __________up. (go)

2. The players ____________ well in the tournament. (perform)

3. Rita ____________ an order for sandwiches at the fast food joint. (place)

4. She ____________ a letter from her aunt. (receive)

5. She_____________ good marks in her Maths exam. (score)

We often use words like recently, just, already with the present perfect tense if the action has

just ended.

In negative sentences, we write: have/has + not + past participle form of the verb.

They have not eaten lunch.

In interrogative sentences, we write: have/ has before the subject. We write: has/have +

subject + past participle form of the verb.

Has he eaten lunch?

PRESENT PERFECT CONTINUOUS TENSE

The present perfect continuous tense is used to describe an action which began in the past and is

still going on.

We write: has/have + been + ing form of the verb.

It can be used with phrases like since, for, long, all day and all week.

The baby has been smiling since her mother returned from office.

The patient has been waiting for the doctor for three hours.

EXERCISE: 2

Read the following sentences and state whether the verbs (in bold) are in the simple

present, present continuous or present perfect tense.

1. The watchman is guarding the house.

2. Nisha has participated in the Sports Meet.

3. My mother is decorating the house for the festival.

4. Mohan enjoys flying kites.

5. Rohan expects good result this year.

EXERCISE: 3

Rewrite these sentences using the subject given in brackets.

1. They have watched animated movies earlier. (She)

2. The Chief Minister has finalised the contract. (The ministers)

3. We have eaten lunch. (He)

4. He looks after the guests well. (I)

EXERCISE: 4

Fill in the blanks with appropriate forms of verbs given in brackets according to the

tenses form mentioned with each sentence.

1. Niti ________ (read) a storybook. (Present Continuous)

2. Here ________ (come) the director of the play. (Simple Present)

3. Kshitij ________ (wear) proper uniform to school everyday. (Simple Present)

4. The little boy _______ (throw) a pebble into the pond. ( Present Perfect)

The answer key of worksheet-8 will be uploaded with worksheet-9

Answer key of worksheet-7

EXERCISE1

Fill in the blanks with the correct forms of the verbs given in brackets.

1. takes

2. like

3. eat

4. are

5. respect

EXERCISE 2

Write these sentences in the negative form.

1. The boy does not ride a bicycle to school.

2. The baby does not jump on the bed in a playful mood.

3. The girl does not clean her room in the morning.

4. They do not waste food at every buffet dinner.

EXERCISE 3

Rewrite these sentences in the interrogative form.

1. Do these musicians only perform at public functions?

2. Does he play basketball every day?

3. Do the flights from Chennai always reach late?

EXERCISE 4

Rewrite the following sentences in negative and interrogative forms.

1. Meena is not washing clothes.

Is Meena washing clothes?

2. The migratory birds are not flying off.

Are the migratory birds flying off?

3. Father is not relaxing in the study.

Is father relaxing in the study?

4. The helper is not cleaning the house.

Is the helper cleaning the house?

5. She is not talking to her friend.

Is she talking to her friend?

***************************************

Class 6 Punjabi Worksheet-6 ( for Mohali & Zirakpur Branches only)

Answer Key for Punjabi worksheet-5 (Mohali and Zirakpur)

******************************

ST. XAVIER’S SCHOOLS, CHANDIGARH, MOHALI, PANCHKULA, ZIRAKPUR

CLASS – 6 S.ST WORKSHEET - 8 (GEOGRAPHY)

CHAPTER – 3 WATER BODIES (OCEANS AND SEAS )

MAJOR SEAS OF THE WORLD

A sea is a large body of salt water .It is an area smaller than ocean and usually lies over a

continental shelf close to land.

BERING SEA

The Bering Sea is the northernmost part of the Pacific Ocean. The Bering Sea is one of the world’s

most productive fishing grounds, producing huge quantities of the king crab, salmon and other

varieties of fish.

CARIBBEAN SEA

The Caribbean Sea is a body of water adjacent to the Atlantic Ocean, southeast of the Gulf of

Mexico. The term “Caribbean” comes from the indigenous Carib people, who lived on the islands

before the Age of Discovery.

The Caribbean contains some of the world’s richest marine biodiversity. Alarmingly, both nature

and people in the Caribbean are increasingly threatened by unsustainable development, pollution,

overfishing and climate change.

THE NORTH SEA

The North Sea is the northeastern arm of the Atlantic Ocean between the British Isles and the

mainland of Europe.

The North Sea is one of the most dangerous seas in the world. It has wild storms and foggy winters.

It is known for its productive fisheries petroleum and natural gas reserves.

BLACK SEA

The Black Sea lies in the southeastern parts of Europe. It is an inland sea. Several great rivers like

Danube, Dnieper, Don etc., drains into it.

CASPIAN SEA

The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the

world’s largest lake or a full fledged sea.

The Volga and the Ural River discharge into the Caspian Sea.

ARABIAN SEA

The Arabian Sea is located in the northwestern part of the Indian Ocean situated between the

Arabian Peninsula and the Indian Sub-Continent. It is economically very important due to the

presence of huge oil fields of Arabia. Mumbai High India’s major oil field is located in the Arabian

Sea.

THE RED SEA

The Red Sea is a seawater inlet of the Indian Ocean lying between Africa and Asia; it is entirely

made of salt water. The Red Sea is long and narrow. The Suez Canal connects the Red Sea to the

Mediterranean Sea. The Red Sea is one of the world’s busiest trade routes .

THE DEAD SEA

The Dead Sea is not a sea but a saltwater lake! The Dead Sea is the second saltiest water body in the

world with a salt content of 33% as compared to 2 or 3%of the other seas around the world.

ARAL SEA

Aral Sea is the fourth largest body of inland water in the world. It is a salt water lake located in the

heart of Central Asia. However, as irrigation needs have forced farmers to drain more and more

water from the rivers feeding the Aral, its volume has decreased by more than two –thirds in the

last 25 years. If present trends continue the Aral will cease to exist.

(A) ANSWER THE FOLLOWING QUESTIONS IN BRIEF:-

Q 1. Define sea.

Q 2. Name the sea where the Mumbai-High is located.

Q 3. Name any two seas of Atlantic Ocean.

Q 4. Name two seas of Indian Ocean.

Q 5. Name the canal which connects the Red Sea to the Mediterranean Sea.

(B) ON THE OUTLINE MAP OF THE WORLD, MARK THE FOLLOWING :-

1. BERING SEA

2. CARIBBEAN SEA

3. ARABIAN SEA

4. NORTH SEA

5. RED SEA

Answer Key for Class 6 ;Worksheet 7 (Civics)

Exercise A

1. Communities, both urban and rural, require public utilities. These are also called civic amenities.

Some examples of civic amenities are water supply, electricity, roads, educational institutions

and health-care facilities.

2. The term ‘panchayat’ comes from the word panch, which was used for the five village elders

who settled disputes and took decisions.

3. The three levels at which panchayats exist are –

i) Village level ii) Block level iii) District level

4. The main sources of income for panchayats are –

i) They get some money from the state government.

ii) They also raise money from taxes on property, fairs, etc and from registration fees for the sale

of property and cattle.

Exercise B

1a) The people of every village, town and city elect representatives to govern their community. In other

words, people themselves govern their community through their representatives. This system is

therefore, called local self- government.

b) In India, the local self- government bodies in rural areas are called the panchayat.

c) Advantages of having local self- government are –

i) In any village or town, it is the local people and their representatives who are in the best position to

understand their problems.

ii) The experience of solving their problems make the local people self- reliant and responsible. This

enables them to act responsibly during emergencies.

iii) Local self-government reduces the work of the central and state governments by taking care of civic

amenities at the local level.

2. The ‘ex-officio members’ means the ones who holds a position due to the power or influence of

one’s office.

In our country, all the heads of the Gram Panchayats of a block become members of the Block Samiti.

Similarly, all the heads of the Block Samitis of a district become members of the Zila Parishad. These

members are called ex-officio members of the panchayats.

Fill ups

i) Three

ii) Wards

************************************

SUBJECT : CHEMISTRY CLASS-6 WORK SHEET : 8

TOPIC: STATES OF MATTER

MATTER - Anything that occupies space and has mass is called matter. Three states of matter are solid, liquid,

gas.

Matter can be classified in different ways . 1. One way is to classify it as naturally occurring materials and man

made materials. 2. The other way of classifying matter is in three states I.e., solid , liquid and gas.

Classification of MATTER :

Atoms and molecules

Matter is made up of extremely tiny particles. These particles are called molecules.

*MOLECULE - It is the smallest particle of a substance which can exist independently.

Molecule is made up of still smaller particles called atom.

*ATOM–Atom is the smallest particle which makes matter.

Arrangement of molecules

SOLIDS - Molecule are arranged compactly in solids. They have least inter molecular space. The force of

attraction between the molecules is very strong.

LIQUIDS - The molecules are loosely held. The force of attraction between the molecules is less and hence free

movement of molecules is there.

GAS - In gases the molecules are very loosely held. There are very large intermolecular spaces. The force of

attraction between the molecules is least and hence the molecules move about freely.

To compare the properties of solid , liquid & gas

Change of state (molecular model)

Heat results in the weakening of the intermolecular force of attraction thus, causing a change of state.

Solids have molecules packed tightly. When solids are heated, the heat energy is used to weaken the existing

forces and hence separates the molecules, thereby forming a liquid state. When the liquid molecules are heated

further, more heat separates the molecules, there by forming gaseous state .Heat even results in the expansion of

solids. Most of the solids expand on heating as their molecular force of attraction decreases and the atoms move

away from each other.

ANSWER THE FOLLOWING

Q1. What do you understand by matter?

Q2. Explain intermolecular force of attraction with regard of solid, liquid and gases?

Q3. Differentiate between solid, liquid and gas?

Q4. Fill in the blanks.

a. The three states of matter are _______,_______,_______ .

b. When a gas is cooled its molecules_________ energy.

c. Molecules are compactly arranged in________ .

d. The position of molecules is a solid is________ .

e.________ molecules move freely in all directions.

f. Air has______ and occupies______ .

g. Intermolecular forces of attraction are least in________ .

Q5. Give reason for the following.

a. Gases have low densities. b. Heat energy brings change of state.

c. Solids do not flow. d. Liquids can be compressed

Q6 Give two examples of the following:

a) Naturally occurring materials.

b) Man made materials.

ANSWER KEY OF PHYSICS WORKSHEET-7

CLASS-VI

Ans-1 (i)Spring balance (ii) Electronic weighing machine (iii) Physical balance

(iv) kilogram (v) lead

Ans2- ( i)-(b) ; (ii)- (c) ; (iii)- (a)

Ans3- To measure mass in laboratories ,we use physical balance because it is very

sensitive and accurate.

Ans4-s

PHYSICAL BALANCE BEAM BALANCE

(i) It is more sensitive and accurate.

(ii) It is used to measure mass of costly things

like gold,silver etc.

(iii) It is enclosed in a glass case.

(i) It is less sensitive and accurate.

(ii) It is used to measure mass of heavier

things.

(iii) It is not enclosed in a glass case.

Ans5- Following are the ways to check the correctness of weights used to measure mass:

1. The weight is made of metal.

2. The measure of weight is written on the upper side of weight.

3. The weight has a hole at the bottom in which some lead (another metal) is filled.

4. The lead has the stamp of “Department of weights and Measures”.

Ans6- The error introduced due to the wrong position of the eye is called parallax error.

Ans7- Following are the ways to check the correctness of beam balance:

1.The beam should be able to move freely on the center axis.

2. The length of strings on both sides of the beam should be equal.

3. The weight of both the pans should be same.

4. It should be approved and stamped by the “department of weights and measures”.

******************************************************************************

SUBJECT-MATHS CLASS –VI WORK SHEET-8

TOPIC – ADDITION OF INTEGERS

Addition of integers using number line:-

To add a positive integer, move to the right on number line.

Example:- Find (-5) + 3

Solution :- Start from -5 on the number line.

Move 3 units to the right. We reach at -2

Therefore, (-5) + 3 = - 2

To add a negative integer, move to the left on the number line.

Example:- Find 5+(-3)

Solution: Start from 5 on the number line.

Move 3 units to the left. We reach at 2.

Therefore, 5+(-3)=2

Addition of integers

To add two positive integers:-

Add them as natural numbers.

Example: (+129) + (+274)

As both integers are positive, so add them like natural numbers.

= (+129) + (+274)

=129+274

=403

To add two negative integers, find the sum of the numbers and give negative sign to the sum

obtained.

= (-78) + (-125)

= - (78+125)

= - 203

To add a positive integer and a negative integer- subtract the smaller number from the larger

number and give the sign of the integer which has the larger absolute value to the result

obtained.

Example: 136 + (-234)

=136 + (-234)

= -(234-136)

= -98

Additive inverse

For every integer a, -a is the additive inverse a and a is the additive inverse of –a.

Hence, -(-a) =a.

Example: -(-20) = +20

Successor and predecessor of an integer:-

One more than a given integer is called its successor (a+1)

One less than a given integer is called its predecessor (a-1)

Example: Successor of -23= -23+1= -22

Predecessor of -23= -23-1 = -24

Q1 Evaluate the following, using the number line:

a. 4 + (-5) b. (-4) + 5 c. 7 + (-3) d. -6 + (-2)

Q2. Evaluate the following:

a. (-8) + (-14) b. -35 + (-47) c. 91 + (-48) d. (-203) +501

e. (-36) + 29 f. (-131) + 97

Q3. Evaluate the following:

a. -1083 + (-3974) b. 706 + (-394) c. 1309 + (-2811)

Q4. Fill in the following blanks:

a. –(-5) = ...... b. –(-30) =. ......... c. –(-539) = .........

Q5. Write down the additive inverses of:

a. 9 b. -11 c. -237 d. 567

Q6. Find the predecessor of 0.

Q7. Find the successor and the predecessor of the following integers:

a. -31 b. -735 c. -240

x-x-x-x-x-x-x-x

ANSWER KEY OF WORK SHEET – 7

Q1. (c) Profit of ₹ 5000 (d) 30 km West of Delhi (e) 200 m below sea level

(f) 325 AD (g) Earning ₹ 2700 (h) 250C below freezing point

Q2. (c) + 3 kg (d) + ₹ 1340 (e) -200C (f) - ₹ 470

(g) + ₹ 2500 (h) – 240 m (i) + 9320 m (j) – 6 m

Q3. (c) 5 (d) 0 (e) -3 (f) 2

Q4. (c) -3 (d) -5 (e) -7 (f) -16

Q5. (a) -8, -7, -6, -5, -4, -3 (b) -3 (c) -8

Q6. (a) 5 (b) -5 (c) right (d) left

Q7. (b) -8, -7, -6, -5

Q8. (b) -11,-12, -13, -14

Q9. (c) 4 (d) -6 (e) -5 (f) -4

Q10. (b) 7 (c) 8 (d) 6 (e) 6

Q11. (c) 8 (d) 8 (e) 20 (f) 14

(g) 4 (h) 6

Q12. (c) < (d) > (e) > (f) <

(g) > (h) <

Q13. (b) 43, 25, 0, -5, -31, -37 (c) 95, 36, -3, -7, -8, -84, -101

Q14. (b) -9, -5, 0, 2, 3 (c) -33, -31, -28, -4, -2, 9, 35

Q15. (a) F (b) T (c) F (d) F

*******************************

COMPUTER APPLICATIONS (CLASS-6): WORKSHEET- 7

CHAPTER : CATEGORIES OF COMPUTER AND COMPUTER LANGUAGES

CATEGORIES OF COMPUTERS

There are Four main types of computers.

They are categorized on the bases of

CHILDREN WE HAVE COVERED THE FOLLOWING

TOPICS IN THIS CHAPTER

SIZE

SPEED

STORAGE

CAPACITY

COST

TYPES OF

COMPUTERS

CHARACTERISTICS

MICRO

COMPUTERS

Small in size and cost less

Designed for Personal Use

Used in homes, offices, shops, banks, etc.

MINI

COMPUTERS

Larger in size than the micro computers

Higher processing speed and costlier

Supports 4 to 200 users

Used in universities, big organizations, etc.

MAINFRAME

COMPUTERS

Very Powerful

Large memory and high speed

Designed to handle huge amount of data

Hundreds of users can work simultaneously

Used in scientific laboratories, stock exchange market, etc.

SUPER

COMPUTERS Powerful computers with huge processing speed

Used for weather forecasting, space research, etc.

COMPUTER LANGUAGES

A Program is a set of instructions that tells the computer what to do.

The process of writing specific instructions in a computer language is called Programming.

People who write programs are known as Programmers.

COMPUTER LANGUAGES CAN BE CLASSIFIED INTO FOLLOWING FOUR

CATEGORIES

CHARACTERISTICS OF MACHINE, ASSEMBLY,HIGH AND FOURTH GENERATION

LANGUAGES

MACHINE

LANGUAGE

ASSEMBLY

LANGUAGE

HIGH LEVEL

LANGUAGE

FOURTH

GENERATION

LANGUAGE

It is expressed in

binary form i.e ‘0’

and ‘1’.

Uses Mnemonic

codes or Symbols

Uses simple

English words and

mathematical

operators

Highly user

friendly and

independent of any

operating system.

Very high speed

and very low memory

utilisation.

Easy to work in

Assembly language

than in binary

language.

Simple and user

friendly.

Machine

independent

Tough to learn and

time consuming.

Tough to learn and

time consuming.

Easy to learn and

use.

Very high speed of

execution.

Machine

dependent

Machine

dependent

Machine

independent.

Minimum efforts

from the user to

obtain any

information

Regarded as Low

Level Language

(LLL)

Regarded as Low

Level Language

(LLL)

Also known as

HLL

Also known as

4GL

LANGUAGE PROCESSORS

Language processor is a type of software that is used to translate a program from a high-level

language into a low-level language.

THERE ARE THREE TYPES OF LANGUAGE PROCESSORS

ASSEMBLER

INTERPRETER

COMPILER

ASSEMBLER

An assembler is a program that converts assembly language into machine code

INTERPRETER

This translator program is used to convert a high level language program into machine language.

An interpreter translates line by line, executes the instructions and then repeats the procedure

for the remaining instructions.

COMPILER

Compiler is a translator program, used to convert a high level language program into machine

language.

A compiler translates the whole program at once.

DIFFERENCE BETWEEN INTERPRETER AND COMPILER

INTERPRETER

COMPILER

It translates the program line by line. It translates the whole program at

once.

It has slow speed of execution. It has high speed of execution.

FILL IN THE BLANKS :-

1. Computers can be categorized into ______________ types.

2. Embedded system is an example of _____________ computers.

3. ______________ computers are used for space research.

4. A ____________ is a set of instructions that tells the computer what to do.

5. Machine language is also regarded as _____________ language.

6. A program written in assembly language is called the _________ program.

7. The translator program used to convert the assembly language program into machine language is

known as ____________.

8. A ______________ translates a high level language program into machine language.

Low level language; Super computers; Language

processor; Four; Source; Micro; Program;

Assembler;

ANSWER KEYS OF PREVIOUS WORKSHEET

STATE TRUE or FALSE

(1) The software required to translate High Level Language program to Machine Language is

called a Language Processor or Language Translator.

(2) Translator program that is used to convert the Machine Language program into Assembly

Language program is known as Assembler.

(3) An interpreter translates the program line by line.

(4) The execution speed of a compiler is slower as compared to an interpreter.

(5) A complier translates the whole program at once.

****************************************

Students are instructed to make subject wise notebooks for all the worksheets.

TRUE

TRUE

TRUE

FALSE

TRUE