DELHI PUBLIC SCHOOL

SECTOR V, B.S. CITY

Date:27th

July to 31st

July Subject :General Science

Class – IV

( E – CONTENT )

INTERCHANGE OF STATES

The three states of matter can be changed by heating and cooling and during

this processfreezing, melting, evaporation and condensationprocesses take

place.

We will learn all the four process one by one:

Freezing– The process of a liquid changing into its solid state on cooling is

known as freezing.

Melting – The process of a solid changing into a liquid on heating is known as

melting.

Evaporation– The process of a liquid changing into its gaseous state on heating

is called evaporation.

Condensation – The process of a gas changing into its liquid state on cooling is

called condensation.

HEATING

SOLUTE, SOLVENT AND SOLUTION

Solute – The solid substance

Solvent – The liquid in which a

Solution – The solute and the solvent together

solute + solvent = solution

solute + solvent = solution

Substances that dissolve in water are called

For example - sugar and salt

Substances that do not dissolve in water are

For example – pebbles , husk etc.

SOLVENT

SOLUTE

SOLUTE, SOLVENT AND SOLUTION

substance that dissolves in a liquid.

The liquid in which a solid substance dissolves.

solute and the solvent together form a solution.

olute + solvent = solution.

olute + solvent = solution.

Hydrogen and oxygen

are two gases. They

combine together to

make water which is

liquid.

Substances that dissolve in water are called soluble substances.

Substances that do not dissolve in water are substances.

Hydrogen and oxygen

are two gases. They

combine together to

make water which is

SOLUTION

Gases such as oxygen and carbon dioxidealso dissolve in water. Aquatic

animals such as fish, dolphins and crabs breathe in oxygendissolved in water

and breathe out carbon dioxide. Aquaticplants use carbon dioxidedissolved in

water for the process of photosynthesis

Note:

1. If too much salt is dissolved in water, nothing would sink in

it. The water in the ‘Dead Sea’ is so salty that a person cannot

drown in it.

2. Oil and petrol are liquids that do not dissolve in water. They

are lighter than water and float on water.

3. Joseph B Priestly invented soda water. He mixed water with

fixed air (carbon-dioxide), and found that the water had a

pleasant taste. He called this soda water.

ASSIGNMENT

I. Answer the following questions:

Q1.) Define: (a) Solute (b) Solvent (c) Solution

Q2.) Differentiate between evaporation and condensation

II. (A) Give the scientific terms for the following:

1. Ice changing into water.

2. Water vapour changing into water.

3. Water changing into ice.

4. Water changing into water vapour.

(B Rishabh has made a glass of ORS by using salt, sugar and water.

Now choose the correct answer from the words given in the bracket below:

(solution, solute, solvent)

In ORS,

1. Water _________

2. Sugar and salt __________

3. ORS ___________

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SECTOR

SUB- SOCIAL STUDIES ( SESSION

CLASS- IV E -content for the week 27.07.20 to 31.07.20

TOPIC-THE COASTAL PLAINS AND THE ISLANDS

SUB-TOPIC – LIFE IN THE COASTAL REGION ( GUJARAT

WEST BENGAL, ODISHA, ANDHRA PRADESH, TELANGANA, TAMIL NADU AND PUDUCHERRY)

GUJARAT:-

• Gandhinagar is the capital. Ahmedabad

textile centre. Sabarmati Ashram is located here. Gujarati is the main

language.

• Gujarat is popular all over the world for its dairy products.

• The traditional costume of Gujarat:

Men: Dhoti, kurta and turbans or caps.

Women: Saree, lehenga and choli.

• Garba is a popular folk dance .The Gir National Park is home to

the Asiatic lions.

MAHARASHTRA:-

• Mumbai is the capital city popularly known as the commercial capital of India.

• Petroleum is found in Bombay High.

• Mahalaxmi Temple, Haji Ali and many beaches are in Mumbai

Goa:-

• Panaji is the capital city and people are either farmers or

fishermen .

• Fort Aguada, churches and beautiful beaches are very

popular. Mando is the famous folk dance.

KARNATAKA:-

• The people of Karnataka mainly grow spices and coconuts.

• Mangalore (Mangaluru) is an important seaport.

KERALA:-

• Thiruvananthapuram is the capital.

• Rice is the main crop . Famous classical dance forms are Kathakali

languages are Malayalam and English.

DELHI PUBLIC SCHOOL

SECTOR- V, BOKARO STEEL CITY

SOCIAL STUDIES ( SESSION-2020-2021)

content for the week 27.07.20 to 31.07.20

THE COASTAL PLAINS AND THE ISLANDS

LIFE IN THE COASTAL REGION ( GUJARAT, MAHARASHTRA, GOA, KARNATAKA, KERALA, WEST BENGAL, ODISHA, ANDHRA PRADESH, TELANGANA, TAMIL NADU AND PUDUCHERRY)

Gandhinagar is the capital. Ahmedabad is the largest city and the

textile centre. Sabarmati Ashram is located here. Gujarati is the main

Gujarat is popular all over the world for its dairy products.

The traditional costume of Gujarat:-

a and turbans or caps.

Women: Saree, lehenga and choli.

Garba is a popular folk dance .The Gir National Park is home to

Mumbai is the capital city popularly known as the commercial capital of India.

found in Bombay High.

Mahalaxmi Temple, Haji Ali and many beaches are in Mumbai.

Panaji is the capital city and people are either farmers or

Fort Aguada, churches and beautiful beaches are very

is the famous folk dance.

The people of Karnataka mainly grow spices and coconuts.

Mangalore (Mangaluru) is an important seaport.

Thiruvananthapuram is the capital.

Rice is the main crop . Famous classical dance forms are Kathakali and Mohiniattam . Main

languages are Malayalam and English.

content for the week 27.07.20 to 31.07.20

THE COASTAL PLAINS AND THE ISLANDS

WEST BENGAL, ODISHA, ANDHRA PRADESH, TELANGANA, TAMIL NADU AND PUDUCHERRY)

Garba is a popular folk dance .The Gir National Park is home to

Mumbai is the capital city popularly known as the commercial capital of India.

and Mohiniattam . Main

Sabarmati Ashram

Fort Aguada

• Important festival : Onam

• Kochi is one of the largest ports in India.

WEST BENGAL:-

• Kolkata is the capital, Durga Puja is the popular festival.

• The main crops grown here are jute and rice.

ODISHA:-

• The Sun Temple at Konark and Jagannath Temple at Puri are famous all over

the world. Chilika Lake, the largest salt water lake in Asia, is a major tourist

attraction.

ANDHRA PRADESH AND TELANGANA:-

• Visakhapatnam in Andhra Pradesh is an important seaport.

• It has a ship- building yard, an iron and steel plant and an oil

refinery.

TAMIL NADU

• Chennai is a seaport and an artificial harbour. Kanniyakumari, the

southernmost tip of mainland of India is in Tamil Nadu.

• Marina Beach is the longest beach in India

PUDUCHERRY

• Puducherry is a Union Territory. It was at one time a French

colony.

• Aurobindo Ashram attracts a large number of foreigners.

** Read the above content carefully and answer the following questions:-

I. Name the following:-( Write the complete sentence in your S.St copy)

a) The longest beach of India.

b) Name the largest salt water lake in Asia.

II. Fill in the blanks. (Write the complete sentence in your S.St copy)

a) Sabarmati Ashram is located in the state of ________.

b) __________ is a folk dance of Goa.

Marina beach

AUROBINDO ASHRAM

III. Questions and answers.(Write the answers given below along with the questions in

your S.St copy)

1. What is the traditional dress of Gujarat?

Ans. The traditional dress of Gujarat is: men wear dhoti, kurta, coat and turbans or caps

and women wear saree, lehenga and choli.

2. Write a short note on Puducherry.

Ans. Puducherry is a Union Territory. It was at one time a French colony.

Aurobindo Ashram attracts a large number of foreigners.