The past perfect tense : simple and continuous Form Function.
PRESENT TENSE (PERFECT AND PERFECT CONTINUOUS) … · The present perfect continuous tense is used...
Transcript of PRESENT TENSE (PERFECT AND PERFECT CONTINUOUS) … · The present perfect continuous tense is used...
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?
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Class 6 Punjabi Worksheet-6 ( for Mohali & Zirakpur Branches only)
Answer Key for Punjabi worksheet-5 (Mohali and Zirakpur)
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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
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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”.
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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
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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.
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Students are instructed to make subject wise notebooks for all the worksheets.
TRUE
TRUE
TRUE
FALSE
TRUE