10. Our Industries

Class 4 SST – Chapter 5: Our Industries – Smart Notes

📘 Chapter 10 – Our Industries (Class 4 TREK Social Studies)

Agro-based 🌾 Mineral-based ⛏️ Forest-based 🌳 Small-scale 🛠️ Large-scale 🏭 Transport 🚚 Power ⚡

1) 🧠 20 Important Words – आसान हिंदी अर्थ के साथ

WordMeaning (Simple Hindi)
Industryजहाँ सामान बनता है—उद्योग / कारखाना
Raw materialकच्चा माल—जिससे चीजें बनती हैं
Manufacturingबनाने की प्रक्रिया
Cottage industryघर/छोटी कार्यशाला में चलने वाला उद्योग
Small-scale industryकम मशीनें और कम मजदूर वाला उद्योग
Large-scale industryबहुत मशीनें और ज़्यादा मजदूर वाला बड़ा उद्योग
Labourमजदूर—काम करने वाले लोग
Capitalधन/पैसा जो उद्योग में लगता है
Marketजहाँ तैयार माल बेचा जाता है—बाज़ार
Powerबिजली/ऊर्जा जो मशीनें चलाती है
WordMeaning (Simple Hindi)
Transportआवागमन—सामान लाने-ले जाने की सुविधा
Agro-basedकृषि-आधारित—खेती के माल से चलने वाले उद्योग
Mineral-basedखनिज-आधारित—लौह, कोयला आदि पर आधारित
Forest-basedजंगल के उत्पादों (लकड़ी, कागज) से जुड़े उद्योग
Textilesकपड़ा उद्योग—धागा/कपड़ा बनाना
Iron & Steelलोहा-इस्पात—भारी धातु का उद्योग
Shipbuildingजहाज़ बनाना
Automobileगाड़ी-मोटर बनाने का उद्योग
Thermal powerकोयले से बनने वाली बिजली
Pollutionप्रदूषण—हवा/पानी/ध्वनि को गंदा करना

2) 📝 Chapter Summary (English) – ~250 words

Industries are places where raw materials are changed into useful goods for our daily life. To start an industry we need several basic factors: raw materials, a supply of power, enough labour, capital (money), good transport and a market to sell products. According to the raw materials used, industries are mainly of three kinds: agro-based (such as cotton textiles, sugar and food processing), mineral-based (iron and steel, cement, aluminium) and forest-based (paper, furniture, matchsticks).

By size, industries may be cottage industries where people work at home with simple tools, small-scale industries that use small machines and a few workers, and large-scale industries such as shipbuilding, automobiles, and iron & steel that use heavy machines and employ thousands of workers. Coal is important because it is used to produce thermal power. Efficient transport is required to bring raw materials to factories and to take finished goods to markets and ports.

India has many famous industrial centres: Ahmedabad for cotton textiles, Jamshedpur and Bhilai for iron and steel, Visakhapatnam for shipbuilding, Bengaluru for electronic goods, and Gurugram for automobiles. We should promote the use of renewable energy, keep factories clean, reduce waste, and plant trees around industrial areas to control pollution. Industries help our country grow by giving jobs, producing goods and earning money, but they must be set up responsibly with care for people and nature.

3) 📝 अध्याय का सार (हिंदी) – ~250 शब्द

उद्योग वह स्थान है जहाँ कच्चा माल उपयोगी वस्तुओं में बदला जाता है। किसी भी उद्योग के लिए मुख्य तत्व हैं—कच्चा माल, बिजली, पर्याप्त मज़दूर, पूँजी (पैसा), अच्छा परिवहन और बाज़ार। प्रयुक्त कच्चे माल के आधार पर उद्योग तीन प्रकार के होते हैं—कृषि-आधारित (कपास वस्त्र, चीनी, खाद्य-प्रसंस्करण), खनिज-आधारित (लोहा-इस्पात, सीमेंट, एल्युमिनियम) और वन-आधारित (कागज़, फ़र्नीचर, माचिस)।

आकार के आधार पर—कुटीर उद्योग घरों में चलने वाले छोटे उद्योग हैं; लघु उद्योग कम मशीनों और कुछ मजदूरों से चलते हैं; जबकि बड़े उद्योग जैसे जहाज़-निर्माण, ऑटोमोबाइल और लोहा-इस्पात भारी मशीनों के साथ हजारों मजदूरों को काम देते हैं। कोयला आवश्यक है क्योंकि इससे थर्मल पावर (ऊष्मा विद्युत) बनती है। उद्योगों के लिए परिवहन बहुत ज़रूरी है ताकि कच्चा माल कारखाने तक पहुँचे और तैयार माल बाज़ारों/बंदरगाहों तक जा सके।

भारत के प्रमुख औद्योगिक केन्द्र—अहमदाबाद (कॉटन टेक्सटाइल्स), जमशेदपुरभिलाई (लोहा-इस्पात), विशाखापट्टनम (शिपबिल्डिंग), बेंगलुरु (इलेक्ट्रॉनिक सामान) और गुरुग्राम (ऑटोमोबाइल) हैं। उद्योग देश को रोज़गार और वस्तुएँ देते हैं, इसलिए इनके साथ नवीकरणीय ऊर्जा का उपयोग, स्वच्छता, अपशिष्ट-न्यूनता और वृक्षारोपण जैसे उपाय अपनाकर प्रकृति की रक्षा करना भी ज़रूरी है।

4) 🔹 Ten Most Important One-Word Answers

  1. Raw material for iron & steel: Iron ore
  2. Power made from coal: Thermal
  3. Industry run at home: Cottage
  4. City famous for cotton textiles: Ahmedabad
  5. Iron & steel city in Jharkhand: Jamshedpur
  6. Electronics hub: Bengaluru
  7. Shipbuilding centre: Visakhapatnam
  8. Automobile hub near Delhi: Gurugram
  9. People working in factories: Labour
  10. Money used in business: Capital

5) ✨ Very Short Answer Questions (2–3 lines each)

1) What is an industry?

An industry is a place where raw materials are changed into finished goods with the help of workers and machines.

2) Why do we need power in industries?

Power runs the machines. Without electricity or other sources of energy, manufacturing cannot happen smoothly.

3) Give two examples of agro-based industries.

Cotton textiles and sugar industry. Both use farm products as raw materials.

4) What is meant by market?

Market is the place or network where finished goods are sold to people or other businesses.

5) Name two important iron & steel centres of India.

Jamshedpur and Bhilai.

6) State one feature of cottage industries.

They are run at home or in small workshops using simple tools and family labour.

7) What is transport used for in industries?

To bring raw materials to factories and to send finished products to markets and ports.

8) Which fuel mostly produces thermal power?

Coal is mainly used to generate thermal power.

9) What do we mean by capital?

Capital is the money and resources invested to start and run an industry.

10) Give two examples of large-scale industries.

Automobile industry and iron & steel industry.

6) 📷 Textbook Questions (from the image) – with Answers

A) Multiple Choice Questions

#QuestionCorrect Option
2.Which of these is the raw material for the iron and steel industry?Iron ore
3.Which of these is produced using coal?Thermal power
4.Which industries use small machines?Small-scale industries
5.Which of these is a large-scale industry?All of these (Shipbuilding, Automobile, Iron & Steel)

B) Match the Columns

Column AColumn B (Match)
1. Cotton textilesAhmedabad
2. Iron and steelJamshedpur
3. Electronic goodsBengaluru
4. ShipbuildingVisakhapatnam
5. AutomobilesGurugram

C) Fill in the Blanks

  1. The basic commodities used in the process of manufacturing products are called raw materials.
  2. Labour in the form of workers is necessary to set up an industry.
  3. Transport is required to bring raw materials to the factory.
  4. Industries that use agricultural products as raw material are known as agro-based industries.
  5. Large-scale industries employ thousands of workers.

D) Unscramble the Letters

ClueJumbledAnswer
The place where manufacturing takes placeCTYAFORFactory
India is one of the leading producers of this productOTTNOC EXSTTIELCotton textiles
A kind of powerTOAMICAtomic
A centre of the iron and steel industryIBLAIHBhilai
A type of industry set up by people in their own homesOCTCTAGE DYSTIUNRCottage industries

E) Answer the Following Questions

1) What are the various factors required for setting up an industry?

Raw materials, power, labour, capital (money), transport, market, and suitable land with supportive government policies.

2) Why is transport important for an industry?

Transport brings raw materials to the factory and takes finished goods to markets and ports, keeping the industry running smoothly.

3) Name the three types of industries according to the raw materials they use.

Agro-based industries, mineral-based industries, and forest-based industries.

4) What are cottage industries?

Small industries started in homes or tiny workshops using simple tools and family labour; they make items like handloom cloth, pottery, and pickles.

5) What is the difference between a small-scale industry and a large-scale industry?

Small-scale industries use small machines, less money and employ few workers; large-scale industries use heavy machines, huge capital and employ thousands producing goods in bulk.

Enrich Your Learning (Helpful Responses)

A) Should all industries use renewable energy sources?

Yes. Solar, wind and hydro reduce pollution and long-term costs. Where not fully possible, industries should at least mix renewables with efficient use of coal and adopt pollution-control devices.

B) List five major industries in India and their main centres.

Cotton textiles – Ahmedabad; Iron & Steel – Jamshedpur/Bhilai; Automobiles – Gurugram/Pune; Electronics – Bengaluru; Shipbuilding – Visakhapatnam.

C) As a factory owner, how can you reduce pollution?

Use cleaner fuels and renewables, maintain machines, recycle water, plant trees around the campus, segregate waste, treat smoke with filters, and follow “reduce–reuse–recycle”.

Notes prepared for quick revision. Study Smart & Shine Bright! ✨

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