This is a BIOGRAPHY of Salim Ali ,a famous

ornithologist , written by Zai Whitaker . Here

Whitaker talks about her childhood days spent with

Salim Ali , who was her grandmother’s brother .

Theirs was a nature-loving family ,inspired by Salim

Ali.They all grew up in a nature-friendly

atmosphere At dinner ,they spoke about

‘habitat’,’ecosystem’,’environment’in their house in

Juhu Lane,Andheri.

Zai remembers her childhood days when her

school friends during weekends woke up late,

whereas she and other members were woken up by

Salim uncle at 5.30 am to go bird watching .

DELHI PUBLIC SCHOOL

SECTOR-5, B.S. CITY

E-CONTENT FOR THE WEEK: 25.10.21 TO 29.10.21

ENG

LISH

A R A R E S P E C I E S O F U N C L E 5

Salim Uncle would drive his Willy’s Jeep and his

temper was never very sweet on the road .They would

walk in the forest and follow pretty streams and

waterfalls .Zai was not a great bird watcher but in the

company of Salim uncle ,she had to.

Salim Ali had a secret bird-finding talent .He could

see what others could not .He could do things which a

young person would generally do. She remembers that

Salim Ali didn’t like noise when he was at work and

very often the children would be scolded by him.

Salim would get up as early as five in the morning and

start typing .He typed most of his books himself .Inspite

of the noise made by the children ,Salim uncle loved

young people .There was laughter when he was around

and his was the loudest and the most croaky. Once on

his birthday, Zai bought a cake which was supposed to

be cut by the sixty two year old Salim Ali, but it fell on

the floor while doing so.’Strange ‘,he said,’it didn’t

break’.

Salim uncle always had a small army of followers

who were mostly children. Many people in the family

became interested in natural history and conservation

because of him .

Bird watching was Salim uncle’s life .It brought joy

on his face .Even a bee-eater or drongo could bring a

special light on his wrinkled ,sunburnt face .

LET’S UNDERSTAND THE QUESTIONS AND

ANSWERS.

1. The narrator says that her family was nature

friendly.Do you agree with her ?Say why or why

not .

Ans- It is true that Zai Whitaker’s family was

nature-friendly because at dinner ,they often

spoke about

‘habitat’,’ecosystem’,’nature’’environment’and

weekends for the children was always for bird-

watching .

2.Did Salim mamoo like children? How do you

know ?

Ans-Even though the children were noisy,Salim

mamoo loved them because even if he scolded

them ,the next minute ,he would catch their necks

with his walking stick and make a funny face .He

made all of them laugh. Also because he loved

them , that’s why he taught them all about nature

and birds .

3.Why did Salim mamoo always have a small

army of followers?

Ans- Salim mamoo always had an army of

followers especially children because they were

interested in wildlife as Salim mamoo was .

4.What effect did Salim mamoo have on his family

members ?

Ans- Salim mamoo had a profound impact on his

family because many people in the family also

became interested in natural history and

conservation because of him.

Make sentences with the following.

1.rare

2.experiences

3.woken up

4.peered at

5.apartment

6.grumble

7.interested in

8.wrinkled

Reference to the context.

He could see what no one else saw,hear what no

one else heard .

Q1.Name the chapter and the author .

The name of the chapter is‘A rare species of uncle’

written by Zai Whitaker .

Q2. Who is ‘he’ referred to here ?

‘He’ refers to Salim Ali, the ornithologist .

Q3. What does the above line mean?

It means that Salim Ali had the rare quality of

seeing the special species of birds and hearing

them which other’s attention would often skip.

ACTIVITY

Write the names of at least 5 different species of

birds which are very rare .

Eg-RAINBOW BIRD

----------------------XXXXX------------------------------

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[ksr igkM+h izns“kksa dh <yoka Hkwfe ij [ksrh ds fy, fodflr {ks= dks

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tkrs gSa

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fy[kksA

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ds mRRj nks&

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fy, D;k fn;k x;k\

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^esjh nkftZfyax ;k+=k* fp= dFkk ds n~okjk n“kkZvksA

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

Delhi Public School

B.S.City, session-2021-2022

Econtent ( 25-10-21 to 29-10-21)

Class-5

Subject- Mathematics

Lesson- Volume

•The space occupied by any object is called the volume.

•Volume is measured in "cubic units".

Consider a cube whose length, breadth and height are 1 cm.

The volume of this cube is 1 cubic centimetre. It is written as

cu cm or cc. We call a cube with 1 cc volume a unit cube. We

always measure volume in cubic units.

1 cc = 1 cm × 1 cm × 1 cm

Volume of a cube

= side x side x side = S x S X S cu units

Or

= length x length x length = l x l x l cu units

Volume of a cuboid

= length x breadth x height = l x b x h cubic units

Note: In a cuboid, when the length, breadth and height

are of different units, convert them to the same unit and

solve.( Width is also called as breadth)

• Units of volume are always cubed.

Example 1: Find the volume of a cube of side 8 cm.

Solution: Volume of cube = l x l x l

= 8 x 8 x 8

= 512 cu cm

Example 2: Find the volume of a cuboid of dimensions 16 cm

x 10 cm x 6 cm.

Solution: Volume of cuboid = l x b x h

= 16 cm x 10cm x 6cm = 960 cu cm

Example 3: Find the volume of a cuboid of dimensions 18 cm

x 30 mm x 15 cm.

Solution:

l = 18 cm,

b = 30 mm = 3 cm (10 mm =1 cm, 30/10 = 3 cm),

h = 15 cm

Volume of cuboid = l x b x h

= 18 x 3 x 15

= 810 cu cm

Exercise 1. Fill in the blanks:

(i) The volume of a rectangular box (or cuboid) = ________ ×

________ × ________

(ii) The volume of a cube = ________ × ________ ×

________

(iii) The volume of a 1 cm cube is ________

(iv)The amount of space occupied by a solid is called ________

2. Find the volume of the cube whose each edge is:

(i) 5 cm

(ii) 4 cm

(iii) 6 cm

3. Find the volume of the cuboid whose dimensions are:

(i) length = 5 m, breadth = 4 m, height = 3 m

(ii) length = 48 cm, breadth = 36 cm, height = 24 cm

(iii) length = 12 m, breadth = 50cm, height = 4 m

4. A cube with an edge of 7 cm and a cuboid measuring 7 cm

× 4 cm × 8 cm are kept on a table. Which shape has more

volume?

5.Find the volume of the given figures. Take the volume of

each small cube as 1 cu cm.

Learn cube tables

-----------------------------------xx-----------------------------

Delhi Public School

Bokaro Steel City

Session-2021-22, Subject – General Science

Class-V E-content Date- 25/10/2021 to 29/10/2021

Ls-9 Soil and its Conservation (Contd….)

Soil erosion- The wearing away of the loose top soil by the action of strong

winds and heavy rains is called soil erosion.

Factors causing soil erosion-

Soil conservation- Protection of soil from wearing away due to physical

forces of water and wind is called soil conservation.

Soil can be conserved in following ways :-

Terrace Farming Planting of trees Embankment

Causes of soil erosion

Natural Processes Human Activities

Water Wind The Sun Overcropping Overgrazing Deforestation

1)Planting more trees- The roots of plants hold the soil firmly together and

prevent soil erosion. So, green cover should be increased on the soil by

planting trees like neem , peepal etc.

Afforestation- Planting of trees on open land is called afforestation.

Reforestation- Planting of trees to restock an existing forest is called

reforestation.

2)Avoid leaving the soil bare- Between harvesting one crop and planting

the next crop, the field should not be left barren. This may blow away the

topsoil and lead to depletion of important soil nutrients, making it

infertile. Farmers can protect the soil by growing cover crops until the

next crop is planted. For example- oats and rye.

3)Terrace farming- Terrace farming is done in the hills. The slope is cut

into steps. This reduces the speed of flowing water. The amount of soil

lost is also less as the soil eroded from one step is deposited on the next

step.

4)By making bunds – In plains, high boundaries of mud in the form of

bunds can be built around the fields.

5)By making embankments- A wall for keeping back water is called

embankment. Building embankments along river banks prevents soil

erosion. The river is unable to flood the nearby fields. Soil is thus

conserved from erosion through water.

6)By avoiding overgrazing – When the grazing animals like cows, sheeps ,

goats etc. graze on the same piece of land continuously for a long time,

the grass cover gets removed. As a result , the top layer of the soil gets

exposed and can be blown or washed away by wind or water. To prevent

such erosion, areas should be reserved for pastures.

7) Constructing dams- Many a time soil erosion is caused by river floods.

Therefore, dams can be constructed across the rivers to prevent soil

erosion.

8)Windbreaks- Windbreaks are barriers formed by trees and other plants.

Farmer plant these barriers around their fields. This prevents the soil from

being blown away. The land is thus saved from wind erosion. These rows

of trees or hedges are called windbreaks.

Land and Soil pollution- The disturbance in the quality of soil is called soil

pollution.

Biodegradable wastes- Wastes which rot easily and can be decomposed by

microorganisms or decomposers are called biodegradable wastes.

Examples –peels of fruits and vegetables ,waste paper,dead plants and

animals etc. These wastes are not harmful to the environment.

Non-biodegradable wastes- Wastes which do not rot easily and cannot be

decomposed by microorganisms or decomposers are called non-

biodegradable wastes.

Examples- plastic bottles ,metal cans etc. These wastes are harmful to the

environment.

Causes of soil pollution –

Dumping non-biodegradable wastes into the soil Excessive use of fertilizers and pesticides

1) Dumping of the non-biodegradable wastes like plastic bags into the soil

leads to soil pollution.

2)Polluted water absorbed by the soil.

3)Use of chemical fertilizers and pesticides.

4) Dumping of minerals, oils and radioactive wastes.

Effects of soil pollution-

Soil pollution leads to infertility of soil and contamination of water and

air.

Assignment

I) Fill in the blanks :-

1) Soil erosion reduces the -----------------------of the soil.

2) The ------------------------is carried away during soil erosion.

3) The top soil contains -----------------and -------------------which are

necessary for the growth of plants.

4) Building -----------along the river banks can prevent soil erosion.

5) ---------------------are barriers formed by trees and other plants.

III) Answer the following questions:-

Q-1 Define:-

i) Soil erosion ii) Afforestation iii) Soil pollution

i) Soil erosion- The wearing away of the loose top soil by the action of

strong winds and heavy rains is called soil erosion.

ii) Afforestation- Planting of trees on open land is called afforestation.

iii) Soil pollution- The disturbance in the quality of soil is called soil

pollution.

Q-2 Define soil conservation. Explain how can you conserve soil.

Ans-2 Protection of soil from wearing away due to physical forces of water

and wind is called soil conservation. The different ways by which we can

conserve soil are :-

i)Planting more trees- The roots of plants hold the soil firmly together and

prevent soil erosion. So, green cover should be increased on the soil by

planting trees like neem ,peepal etc.

ii)Avoid leaving the soil bare- Between harvesting one crop and planting

the next crop, the field should not be left barren. This may blow away the

topsoil . Farmers can protect the soil by growing cover crops until the next

crop is planted.

iii)By making bunds – In plains, high boundaries of mud in the form of

bunds can be built around the fields.

iv) By making embankments- Building embankments along river banks

prevents soil erosion. The river is unable to flood the nearby fields.

v) By avoiding overgrazing – When the grazing animals like cows, sheeps ,

goats etc. graze on the same piece of land continuously for a long time,

the grass cover gets removed and the soil is exposed to wind and water.

To prevent such erosion, areas should be reserved for pastures.

vi) Constructing dams- Many a time soil erosion is caused by river floods.

Therefore, dams can be constructed across the rivers to prevent soil

erosion.

vii) Windbreaks- Windbreaks are barriers formed by trees and other

plants. This prevents the soil from being blown away.

Q-3 What are the causes of soil pollution ? (Any four points)

Ans-3 Causes of soil pollution are :-

i) Dumping of the non-biodegradable wastes like plastic bags into the soil

leads to soil pollution.

ii)Polluted water absorbed by the soil.

iii)Use of chemical fertilizers and pesticides.

iv) Dumping of minerals , oils and radioactive wastes.

Q-4 Write the differences between biodegradable and non-biodegradable

wastes .

Ans-4 The differences between biodegradable and non-biodegradable

wastes are –

Sl. No.

Biodegradable Wastes Non-biodegradable Wastes

i) Wastes which rot easily and can be decomposed by microorganisms or decomposers are called biodegradable wastes.

Wastes which do not rot easily and cannot be decomposed by microorganisms or decomposers are called non-biodegradable wastes.

ii) These wastes are not harmful to the environment. Examples- peels of fruits and vegetables, waste papers ,dead plants and animals etc.

These wastes are harmful to the environment. Examples-plastic bottles, metal cans etc.

Q-5 What are the causes of soil erosion ? Explain.

Ans-5 Causes of soil erosion are :-

i) Wind- Wind blows away the top layer of dry soil. It usually takes

place where there is less vegetation.

ii) Deforestation- Cutting down of trees on a large scale is called

deforestation. It exposes the soil to wind and water which carry

away the top soil.

iii) Water-Heavy rains and flowing water removes the top soil.

iv) The sun- The heat of the sun evaporates the moisture of exposed soil

and dries it up. Dry soil breaks up easily and turns into small particles

and is blown away by wind, resulting in soil erosion.

v) Overgrazing – Overgrazing by cattle removes the plant cover from

the soil . As a result, soil erosion increases.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

DELHI PUBLIC SCHOOL

BOKARO STEEL CITY E-CONTENT (Session: 2021-22)

Date: 25 /10/21 to 29/10/21 Subject: Social Studies

Class: V

LESSON: 15 TOWARDS FREEDOM ** CONTENT OF THE LESSON: INTRODUCTION ❖ India has always been famous for spices, textiles, jewellery and pearls. ❖ The Arabs were among the first to come to India for trade. The Portuguese, the

Dutch, the French and the British came after the Arabs. ❖ The British emerged as the most powerful among them. They traded through the

East India Company. ❖ East India company bought goods at cheaper price from India and sold at higher

price. The company earned huge profit in business and gradually established full control all over India. DISCONTENT AMONG INDIANS

❖ The British exploited the farmers, traders, craftsmen and the rulers of local kingdoms.

❖ The farmers were made to pay very high taxes even during floods and droughts.

❖ The farmers were forced to grow indigo (a plant which is a source of indigo dye) and cotton. These were bought at very low rates and sold at very high rates in England and other countries. Thus, farmers in India became poorer and died due to starvation. (Starvation means the state of having no food for a long period)

❖ The handloom industry of India suffered a lot as cheaper mill-made cloth was imported in India from England. Indians were not allowed to open mills and factories. Indian traders were not allowed to trade in the items of their choice.

❖ A law was passed by the British which stated that if a ruler did not have a child, then after the death of that ruler, his kingdom would be taken over by the British. This law was known as the ‘Doctrine of Lapse’. This law was introduced by Lord Dalhousie, the Governor-general of India. It resulted in dissatisfaction and anger among the Indians which led them to revolt.

TOPICS: Introduction, Discontent Among Indians, Revolt Against the British

INDIGO PLANT

REVOLT AGAINST THE BRITISH

❖ A major revolt broke out in the year 1857 which was the First War of Independence (also called the Sepoy Mutiny or the Great Revolt of 1857). It was an important event in India’s struggle for freedom.

❖ The Revolt was started by the Indian soldiers serving the British army in India.

❖ A new rifle, called the Enfield (Full Name-Short Magazine Lee Enfield) had been introduced in India.

❖ A rumour spread that the grease used in the bullets was made from the fat of cows and pigs. Soldiers had to bite off the greased wrapper of the bullet before loading it in the rifle.This was against the religious sentiments of both Hindu and Muslim soldiers. They refused to use these rifles and revolted.

❖ The Revolt started at Meerut and soon spread to large parts of northern and central India. Farmers, craftsmen and other sections of the society joined the Revolt.

❖ Bahadur Shah Zafar, the last Mughal Emperor was declared leader by the soldiers. ❖ The Revolt was led by Nana Sahib and Tantia Tope at Kanpur, Rani Lakshmi Bai at

Jhansi and Begum Hazrat Mahal at Awadh.

Exercises I. Fill in the blanks: (Write the complete sentence in your S.st notebook)

1._____________ was the last Mughal Emperor. 2.The Revolt of 1857 started at ________. 3. The _____were among the first to come to India for trade.

II. Name the following:(Note down the question before writing their answers in your S.st notebook)

1. A new rifle introduced in India during the First War of Independence. 2. The queen who led the Revolt of 1857 in Jhansi.

III. Answer the following questions. (Note down the questions along with the answers in your S.st notebook)

Q1.How was the trade with India profitable for the English East India Company? (Write in two points) Ans: The trade with India was profitable for the English East India Company in the following ways: (i) East India company bought goods at cheaper price from India and sold at higher price.

Short Magazine Lee Enfield

(ii) The company earned huge profit in business and gradually established full control all over India. Q2. What was the ‘Doctrine of Lapse’? Who introduced it? Ans 2. A law was passed by the British which stated that if a ruler did not have a child, then after the death of that ruler, his kingdom would be taken over by the British. This law was known as the ‘Doctrine of Lapse’. This law was introduced by Lord Dalhousie, the Governor-general of India. III. Write the year of occurrences of the following historical events: -

(Instructions: (i)Make this tabular chart in your S.st notebook) (ii) Refer to Lesson 14 and Lesson 15 of your textbook for

completing the chart given below:

SL NO. HISTORICAL EVENTS YEAR OF OCCURRENCE

1. The First World War (Start and End)

2. Formation Of United Nations 3. The Formation of League of Nations

4. Appointment of Adolf Hitler as the Chancellor of Germany

5. The Second World War (Start and End) 6. The First War of Independence

PROJECT: Make a collage of any one Freedom Fighter Of India who participated

in India’s Struggle for freedom before independence. Make the collage on a 1/4th

sheet of chart paper. Mention the name of the Freedom Fighter also. Write your

Name, Class and Section at the bottom of the chart paper. ____________________________________________________________________

DELHI PUBLIC SCHOOL

BOKARO STEEL CITY

CLASS-V SUBJECT- GK

ECONTENT FOR THE WEEK (25-10-21 to 29-10-21)

Read and learn L-30 of your GK book “GOOD BETTER BEST”

****Copy down the GK econtent in a thin copy.

Fill in the blanks:-

1. The colour of the human skin is determined by the level of pigment _______ that the body produces. Ans:- Melanin.

2. Antibiotics are only effective against_______. Ans:- Bacteria.

3. ______ blood cells carry oxygen to the cells. Ans:- Red.

4. _____ blood cells clean the blood and fight germs.

Ans:-White.

5. _____ has been re-elected to UN Human Rights Council for record 6th term with overwhelming majorityi.e 184 out of 193.The elections were held by the United Nations General Assembly on October 14, 2021.

Ans:- India.

__________xxxxx_________________xxxxxx______

DELHI PUBLIC SCHOOL, B.S. CITY

FOR THE WEEK 25.10.21 TO 29.10.21

ECONTENT-20

TECHNICAL ACTIVITY

CLASS-5

MS-EXCEL (CONTD.)

HOW TO SELECT A ROW AND COLUMN

To select any row or any column, click on the ROW HEADERor COLUMN HEADER.

HOW TO CHANGE HEIGHT OF ROWS :

To change the height of a row –1. Select the row.2. Right click on the selected row.3. Options will pop upClick on ‘ROW HEIGHT’.

4. A text box will appear, there increase the height of therow (height should be given in numbers).

5. Finally, after clicking “OK”, we may see that the rowheight had been increased.

HOW TO CHANGE WIDTH OF COLUMNS :

To change the width of a column –1. Select the column.2. Right click on the selected column.3. Options will pop upClick on ‘COLUMNWIDTH’.

4. A text box will appear, there increase the width of thecolumn (width should be given in numbers).

5. Finally, after clicking “OK”, we may see that the columnwidth had been increased.

COPY AND PASTE1. Select the cell(s) that you wish to copy.2. Click on Copy in the ‘Clipboard’ group of the ‘HOME’ tab.

3. Select the cell(s) where you would like to copy thedata.

4. In the ‘Clipboard’ group of the ‘Home’ tab, click onPaste option. The data gets pasted at a new place.

EXERCISE

Do QD, QE, QF from the book (page no.-100).

PROJECT WORK:

Prepare a ‘MARKSHEET’ in MS-EXCEL for 25 students of yourclass.

Example has been given-