Solar System and Earth's Movements
Solar System and Earth's Movements
IV STANDARD
Term I
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What these Icons stand for!
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WONDERS IN THE SKY
Hearing the voice of the postman, Divya came out and
received the parcel from him.
It was a DVD from her uncle .
Sir, post
She was very curious to know
what the DVD contained.
METEORS
Little pieces of rock and debris in
space are called meteoroids. These
meteoroids as they enter the earth’s
atmosphere get heated up due to friction
and leave a trail of bright light and called
meteors.
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MOON
end and rotate the rope above your head so that the ball moves in circles.
The ball is in continuous motion until you hold the end of the rope.
Likewise, the Sun keeps the other planets intact because of its force of
attraction.
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THE SOLAR SYSTEM
The Sun is at the centre of the solar system
The planets, comets, meteors and satellites
move around the Sun on a fixed path called an
orbit. The Sun and its eight planets make up
the solar system.
Look at the sentence, The starting letters of the planets are given
in colour, With the clues given try and write the names of the
eight planets and colour them.
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1. MERCURY
2. VENUS
It is the second planet in the solar family. It
revolves around the Sun from east to west. After the
Sun and the Moon, Venus is the brightest natural object
in the sky. It is also called the morning star or the
evening star because on some days we can see it
just before the sunrise or sun set.
3.THE EARTH
The third planet from the Sun is the Earth. It is the
home to all living things as it fulfills their basic needs.
The earth is neither too close nor too far away from the
Sun . It supports life and hence called The Living Planet.
The surface of the earth is made up of land and water.
About 71% of the earth's surface is covered by water
and 29% by land.
4.MARS
It is the fourth planet in the solar family.
Inactive volcanoes, rocky deserts and ice
covered poles were discovered on this planet.
The minerals and the iron present in the soil in
Mars give a red colour to this planet. It is a cold
SOCIAL SCIENCE
Collect articles and pictures related to space from the newspapers and
make an album.
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5.JUPITER
It is the fifth and the largest planet in our solar
system. The surface of the planet is surrounded by
dark red and yellow clouds made of gases and
dust.The colour of the clouds depends on the gases.It
takes 12 years to make one revolution. It has 16
moons.
6.SATURN
Saturn is the sixth planet. It is a light planet, and mostly made
up of helium and hydrogen. It is surrounded by gases, dust, rocks
and icy boulders which make it look beautiful with its ring. For that
reason, it is also known as 'The Ringed Planet'. It has 30 moons.
Galileo Galili was the first person to discover the rings around
Saturn.
7.URANUS
Uranus is the seventh planet. Unlike the other
planets it does not spin on its axis. It rolls around the
sun.This planet is made up of hydrogen, along with
methane and helium. It is bluish green in colour. The
dust around it looks like a ring around it. It has 15 moons.
8.NEPTUNE
It is the eighth and the farthest planet.It appears
blue like an ocean. The Romans named it after the
God of the sea. It is made up of hydrogen, helium,
water and methane. It has 13 known moons.
Pluto is not considered a planet.
SOCIAL SCIENCE
Do you know?
Find out why.
Watching all this through the DVD, Divya was amazed.She clearly
learnt about the solar system .She started writing a thank-you letter to her
uncle for sending her a DVD worth watching several times.
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EXERCISES
I.CHOOSE THE CORRECT ANSWER
1. _____________ are luminous bodies.
a) stars b) planets c) moon
2. Satellite that moves around the earth is___________.
a) Sun b) Venus c) moon
3. There are____________planets in the solar family.
a) eight b) five c) ten
4. Gas which is not present in the sun is_________________.
a) methane b) hydrogen c) oxygen
5. The largest planet in the solar family is____________.
a) Mars b) Jupiter c) Neptune.
II.FILL IN THE BLANKS
1. The only planet which is suitable for living things is_______________.
2. The Sun is a ball of ______________.
3. The planet that can be seen in the sky in the morning and in
the evening is ______________________.
4. The surface of Mars is covered with ________________ and dust .
IV.ACTIVITIES
1. Conduct a quiz programme on the topic ‘Solar System’.
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EFFECTS OF ROTATION ON THE EARTH
1. It causes day and night.
2. Earth rotates from west to east [anti-clockwise]. So places in the
east experience the day rst.
3. Since the Earth spins from west to east, The Sun appears to rises
in the east and sets in the west.This gives us a sense of direction.
REVOLUTION
Purvika is three years old now. How many times do you think
she would have travelled around the Sun?
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DO AND LEARN
You can track the changing seasons for yourself.
Note down the time of sunrise and sunset of your place every day
for a month. Mark the time on a line graph. Are the days getting longer
or shorter? Why ?
NORTHERN HEMISPHERE NORTH POLE
VERTICAL
RAYS
SOUTHERN HEMISPHERE
ING RAYS
SLANT
SOUTH POLE
SEASONS
SPRING
It is a pleasant season that comes between
winter and summer. We can see the new leaves on the
trees,the flowers are in full bloom.There is a promise of
new beginnings and colour in the spring time air.
SUMMER
Summer is the hottest season among the four.
During this season we have longer days.
______________________________________
______________________________________
Which season do you like the most? Why?
_______________________________________________________________
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AUTUMN
Autumn is the season between summer and
winter. The air begins to cool. The trees shed their
leaves.This season does not occur in India
because of its geographical location.
WINTER
Winter is the coldest season. Our winters bring
us cool weather. During this season the days are
short and the nights are long. Snowfall occurs in
some countries and hilly regions.
SEASONS IN INDIA
India has only three predominant seasons. They
are summer season, rainy season and winter season.
1.SUMMER SEASON
During summer many parts of India get extremely hot. Days are very
hot and nights are warm. March, April and May are the summer months.
2.WINTER SEASON
The Indian winter in most parts of the country is usually mild and
enjoyable when compared to the other countries of the world.
November to February are the winter months. Some parts of our
country like Ladakh, Kashmir and Himachal Pradesh gets snow fall
during these months. In different parts of our State, we have
vegetables and fruits that grow during this season.
Can you name some?___________________________.
3.RAINY SEASON
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INFLUENCE OF SEASONS ON HUMANS
Our lifestyle changes according to the season. During
summer, we like to drink tender coconut, fruit juice, ice apple
(nungu) and wear cotton clothes We like to have hot steaming
food and beverages in winter. During winter we wear warm
wollen clothes.We use raincoats, gum boots and umbrellas
during the rainy season.
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The Polar regions remain frozen in winter. In the
extreme cold condition food is scarce. So the Polar
bears undergo long winter sleep called Hibernation .
The excess fat stored in their body provides energy
and helps them to survive during hibernation.
AVAILABLE IN AVAILABLE IN
ALL SEASONS A PARTICULAR
SEASON
VEGETABLES
FRUITS
FLOWERS
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ECLIPSE
Eclipse is an astronomical event that occurs when one celestial
object casts a shadow on another.
There are two types of eclipses.
THE SOLAR ECLIPSE (solar-sun;eclipse-hidden)
When the moon comes between the sun and the earth the shadow
of the moon falls on the Earth. People who live in that part of the earth
cannot see the Sun. This is called solar eclipse. This can occur only
on a new moon day.
SUN
MOON
EARTH
SOLAR ECLIPSE
EARTH
MOON
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LUNAR ECLIPSE
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SOME INTERESTING FACTS!
1. If you feel cold during winter, just remember that in parts of North
America and Europe, the temperature in winter can be as low as
o
minus 50 C [ice everywhere]
2. The ideal room temperature is 25oc.
3. The wettest place on Earth is in India, at a place called Mawsynram
- it receives 12 metres of rainfall every year!
4. The world's driest place is in Chile, the Atacama desert.
4. Find out if 2 full moon days occur in any single month this year
5. Spot the weather, climate associated words from the grid.
W I N T E R H U
L I T H I S O N
P R A I N U T E
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EXERCISE
I. FILL IN THE BLANKS
1. The movement of the Earth on its own axis is called ___________.
2. The number of days the Earth takes to go round the Sun is _____.
3. The days are short and the nights are long in ________.
4. The average temperature of a particular place over a period of
time is called _______________.
5. The revolution of the Earth around the Sun and the tilt of the
Earth's axis causes ____________.
II. WHAT IS IT?
1. It can be seen in the coming of new leaves on the trees. ________.
2. It appears as a dark circle in the night sky on certain days. ______.
3. It occurs when one celestial object moves into the shadow of
another. ________.
4. It is usually mild and enjoyable when compared to the other
countries of the world. _______________.
5. It rotates from west to east. ___________.
III. WRITE 2 THINGS YOU CAN DO DURING THE FOLLOWING DAYS.
Sunny Day __________________________________________.
Cloudy Day _________________________________________.
Rainy Day __________________________________________ .
Windy Day __________________________________________.
4. What happens when the Earth comes in between the Sun and the
Moon?
5. Name the seasons of India.
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EARTH'S GIFT
Natural resources are materials that are available naturally on the
earth.The Sun, air, land, water, natural gas, coal, oil, petroleum,
minerals, wood, topsoil, fauna, flora, forests and wildlife are not made by
human beings. Therefore they are natural resources.
Identify the resources in the pictures and complete the boxes provided.
RENEWABLE RESOURCES
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1. RENEWABLE RESOURCES
Renewable resources are those that can be used again and again
Eg. Air, Water, and Sunlight.
2.NON- RENEWABLE RESOURCES
Non renewable resources are those that cannot be produced again
and again Eg. Coal, Petroleum. These natural resources are found
under the surface of the earth. With every advancement in technology,
our needs are growing and we tend to over indulge with the available
natural resources. It is our responsibility to use the resources
judiciously and conserve some for the future generations.
THINK........
Ravi’s mother Asked him Greedy Ravi The next day he
gave him 10 to eat ate all the did not have any
chocolates one a day chocolates chocolate to eat
within a day why did
this happen?
Think!
WATER
Water is important for all living beings. We depend on
the monsoon for rain. Though 71% of earth is covered by
water only 2% is fresh water which is usable .Therefore
our main source of water is rain. The rain water gets
collected in rivers, lakes, ponds etc.and it is used for
domestic purposes, irrigation, and also for the industries.
So it is our duty to conserve water.
Make a model of a house with thermocol
with rain water harvesting facility.
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METHODS OF CONSERVING WATER
SOIL
Soil is an important natural resource. It takes thousands of years to
form a layer of soil. It is formed by breaking up of rocks and decayed
organic matter. Soil varies from region to region depending on the
surface, climate and rainfall.
TYPES OF SOIL
The main types of soil found in different regions of India are
SOCIAL SCIENCE
ALLUVIAL SOIL BLACK SOIL RED SOIL LATERITE SOIL DESERT SOIL
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SOIL FERTILITY
Soil contains dead plants and animals, minerals, water and air which
make the soil rich and fertile.Plants and trees grow on the top layer
of the earth's surface .
Do you wish to become a farmer? Give one reason for your answer.
_______________________________________________________
_______________________________________________________
_______________________________________________________
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CROP ROTATION
Successive planting of different crops on the same
land is called crop rotation. This helps us to improve
soil fertility and to control insects and diseases.In crop
rotation a cultivated crop(for example rice)is alternated
with a legume (for example pulses or ground nuts). Legumes help us to
maintain the fertility of the soil by taking in nitrogen from the atmosphere
MIXED FARMING
AIR
Air is one of our basic needs. All living things need air to breathe.
Air consists of nitrogen, oxygen and other gases. Fresh air keeps us
healthy. It is an important natural resource.
The energy we get from the sun is called Solar energy.It is the eco-
SOCIAL SCIENCE
friendly energy of the future. Today, solar energy is used to heat water
and light up homes. Solar energy is tapped to burn LED bulbs !
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WAYS TO CONTROL AIR POLLUTION
There is a need to keep the air clean.
1. Vehicles should run on cleaner fuels like CNG. (Compressed
Natural Gas)
2. Garbage ,plastics and other wastes should not be burned in the
open.
3. Factories should lter and check the harmful gases before they are
let out into the atmosphere.
FOREST
A forest is a large area of land thickly covered by trees. One fth of
the land in India is covered by forests. Forests reduce air pollution
improve the quality of soil and make it fertile. The roots of trees .
help in reducing soil erosion.
They provide us with food, timber, medicines and are homes
to many animals and birds. They also provide raw materials
for industries. These rich ora and fauna are our natural
resources. We need to conserve our forests to prevent
oods, landslides and soil erosion.
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METHODS OF CONSERVING FORESTS
1. Should prevent over grazing by cattle.
2. Afforestation (planting of trees).
The government has made a
conscious effort to safeguard our
environment by launching many
programmes to plant more trees .
GLOBAL WARMING
Global warming is the increase in the average temperature of the
Earth's surface and oceans.This is due to emission of green house gases
such as carbon dioxide from factories,vehicles and burning of fossil fuels
or from deforestation. This rise in temperature changes the climate,
melts the ice sheets and causes a rise in the sea level. This will pose a
great danger to the survival of our planet Earth.So, it is the responsibility
of every one of us to take care and save the Earth from any such danger.
Draw a picture and write a slogan on the topic "Save our Earth"
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ACTIVITIES
I. We are the water bodies. Can you find us in the word grid ?
S L A K E R T
O P R Q E I U
W E L L R V B
C G J H D E F
P O N D W R Z
II. Find out the difference between the two pictures and write the
difference in the given pollution column.
LAND
WATER
AIR
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III. Initiate a discussion on the Earth and its resources.
IV. Encourage the students to use water judiciously at home and
at the school.
V. Ask them to find out the types of Soil in their region.
VI. Have a debate on the hazards of Air pollution.
VII Teach them the benefits of growing trees.
VIII.Let each class sow and maintain a plant at school.
IX. Collect data of the dams in India and discuss the advantages and
disadvantages of dams and find how the hydro electric power is generated.
EXERCISE
I.CIRCLE THE CORRECT WORD IN THE FOLLOWING SENTENCES.
1. Water and sunlight are renewable / non renewable resources
2. Soil erosion increases / decreases the fertility of the soil.
3. We need / do not need air to breathe.
4. We must plant/ not plant more trees.
II.SAY WHETHER THESE SENTENCES ARE TRUE OR FALSE
1.There are two types of resources ( )
2.Coal is a renewable resource ( )
3.Our main source of water is rain ( )
4.The government does not encourage people to grow more trees ( )
III. ANSWER THE FOLLOWING
1. Write any four methods by which soil can be conserved.
2. Name the two social forestry programmes.
3. How can air pollution be avoided?
4. What is global warming?
5. Suggest ways to protect our planet.
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2. INDIRA GANDHI WILDLIFE SANCTUARY -
NATIONAL PARK
It is in the Anamalai Hills. The hills are high and the
endemic forest is the Shola, with lots of bamboo!
Look at the animals.
Which is your favourite one?
___________________________
GULLS DUCKS
These birds spend the winter in warm places . Thousands of greater
amingo also ock here. The migratory birds are best seen between
November and March. Why do these birds migrate? Think __________
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4. SRIVILLIPUTHUR GRIZZLED SQUIRREL
WILDLIFE SANCTUARY
This Sanctuary spread over an area of 480 sq.km. It
was opened in 1989 to protect the grizzled squirrel. The
endangered grizzled squirrel is the key species. This squirrel
is larger than the three-striped palm squirrel and it is
brownish grey in colour. Its belly is dirty white and its
tail has white bands. This squirrel lives in tamarind, vagai,
naval, neer maruthu and neem trees.
5.GULF OF MANNAR MARINE NATIONAL PARK
Gulf of Mannar Marine National Park is part of the
10,500 sq.km. of Gulf of Mannar Biosphere Reserve.
It is situated on the south-east coast of
India. It is known for its rich marine life.
Marine elements like algae , sea
grasses, coral reefs, salt marshes and mangroves
combined with mudats and estuaries, allow 3,600 kinds
of plants and animals to exist.
6. GUINDY NATIONAL PARK
The Guindy National Park is the eighth smallest
national park in India and it is in the heart of Chennai.It
was the hunting place of Gilbert Rodericks for the
British. The Tamilnadu Forest Department tookover
the park in the year 1958. The park has more than 350
types of plants.
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__________________________________________________________________
_________________________________________________________________
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We can see varieties of animals like Deer, Mongoose, Fox etc...
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7 WILDLIFE SANCTUARIES IN TAMILNADU
1. Grizzled Squirrel Wildlife Sanctuary, a Giant Squirrel Sanctuary
near Srivilliputhur is in Virudhunagar district.
2. Indira Gandhi Wildlife Sanctuary is near Indira Gandhi National
Park in Coimbatore District.
3. Kalakkad Wildlife Sanctuary in Tirunelveli District is part of the
Kalakkad Mundanthurai Tiger Reserve .
4. Kanyakumari Wildlife Sanctuary is a tiger habitat in Kanyakumari
district.
5. Mudumalai Wildlife Sanctuary in Nilgiris district is close to
Mudumalai National Park.
6. Sathyamangalam Sanctuary in Erode District, was made a
sanctuary in 2008.
7. Vallanadu Wildlife Sanctuary, a Black Buck Antelope
sanctuary is in Thoothukudi District.
13 BIRD SANCTUARIES IN TAMILNADU
1. Chitrangudi Bird Sanctuary - Ramnadapuram District
2. Kanjirankulam Bird Sanctuary - Ramnadapuram District
3. Karaivetti Bird Sanctuary - Perambalur District
4. Karikili Bird Sanctuary - Kancheepuram District
5. Koonthankulam Bird Sanctuary - Tirunelveli District
6. Melselvanur-Keelselvanur
Bird Sanctuary - Ramnadapuram District
7. Point Kalimar Bird Sanctuary - Tanjore District
8. Pulicat Lake Bird Sanctuary - Thiruvallur District
9. Udhayamarthandapuram
Bird Sanctuary - Thiruvarur District.
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Apart from these 13 birds sanctuaries we have Veralimalai Peacock
Sanctuary-Pudukottai district. Kallaperambalur lake located in Tanjore
district has been recently announced as a bird sanctuary by the forest
department.
With the help of Tamilnadu political map do this activity.
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EXERCISE
I. FILL IN THE BLANKS
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0
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3. The plan of restoring the kingdom of Mysore to the sons of
Tipu Sultan was also a reason for this mutiny.
The British put down these revolts with their military power [armed
forces]. The power of the East India Company was transferred to the
Queen of England and the British became a strong power in India.
Banerjee, Bipin Chandra Pal and Lala Lajpat Rai were some of the early
leaders of the Congress. These leaders united the people for the cause
of freedom with patriotic messages. Poet Rabindranath Tagore's
patriotic songs brought the people together to a great extent.
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THE PARTITION OF BENGAL 1905
The British were worried about the
growth of nationalistic [patriotic] feelings
among the Indians. In order to prevent this,
Lord Curzon divided Bengal (the source of all
revolts) into East and West in 1905 . The
eastern part of Bengal had Muslim majority and
BURNING FOREIGN CLOTHES
the western part had Hindu majority. By doing
so he tried to destroy Hindu-Muslim unity.
This partition of Bengal angered the people and led to the Swadeshi
movement. Indians began to use only goods made in India and
boycotted [refused to use] the British goods by throwing them into
bonres lit in public places.
unite the people. He felt that if the Indians refused to cooperate with
the British, their rule in India would collapse and India would become
free. So he launched the Non-Cooperation Movement in 1920.
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THE CIVIL DISOBEDIENCE MOVEMENT 1930
In 1930 Gandhiji launched the civil disobedience movement. He
asked people to disobey all the British laws. Gandhiji took up Dandi March
(Salt Satyagraha) against the tax on salt because Indians were asked to
pay money to the British in order to produce salt! In the south, under the
leadership of Rajaji (C. Rajagoplachari) people marched from Tiruchi to
Vedaranyam to break the salt tax law.
THE QUIT INDIA MOVEMENT 1942
In 1942 during the Second World War the British wanted India to
join the war. India demanded complete independence in return. Since the
British were not willing Gandhiji launched the Quit India Movement in1942.
INDIA BECAME INDEPENDENT 1947
Gandhiji asked the people to 'Do or Die'. The movement gained great
momentum. Slowly the British agreed to leave India. Thus India attained
Independence on 15 th August 1947. Jawaharlal Nehru became the
rst Prime Minister of independent India.
LEADERSHIP AND INSPIRATIONS
MOHANDAS KARAMCHAND GANDHI
He was born on 2 nd October 1869 at Porbandar (Gujarat). He had
his early education in India and went to England to study law. In 1893 he
went to South Africa to practise law. During his stay there he saw the
racial discrimination and oppression committed against the Indians and
began to ght against the whites.
It was only then the concept of Satyagraha (satya- truth, agraha-
ght) which is based on truth and non-violence, evolved in him.
He came back to India in 1915 and visited
every nook and corner of India and set up the
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Trade centres
Surat,M
adras(C
hennai)
,Calcutt
a(Kolka
tta)
England
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Jallian Wallahbagh Massacre 1919 A.D
General Dyre
Establishment of Indian
national congress 1885 A.D
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TIMELINE CHART
YEAR EVENTS
1600 Establishment of East India Company
1806 Vellore Mutiny
1857 Sepoy Mutiny
ACTIVITIES
I. WORK IN GROUPS
Find out the various steps through which our National flag
was developed - draw and show.
Collect pictures of your favourite freedom fighter and make
a chart to say why he / she is your favourite.
6. T_________ X M W E Y G H C A
A M N Y S I F N L
C A W Q S E D J E
V I R I F W U D S
T U J T A G O R E
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EXERCISE
I. COMPLETE THE FOLLOWING SENTENCES
1. The East India Company established its first trading
centre in India at _______.
2. The main reason for the 1806 Vellore Mutiny was change in _____.
3. A.O. Hume a British official suggested the formation of_________.
4. Rabindranath Tagore brought the people together through
his _________.
5. In 1920 Gandhiji launched _____________.
II. GIVE REASONS
VELLORE
SEPOY
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'I can, I did'
Student's Activity Record
Subject:
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