Maharashtra Board Class 6 Science Chapter 6 Substances in Daily Use Solutions

Substances In Daily Use Class 6 Science Chapter 6 Questions And Answers Maharashtra Board

Std 6 Science Chapter 6 Substances In Daily Use Question Answer Maharashtra Board

Class 6 Science Chapter 6 Substances In Daily Use Question Answer Maharashtra Board

Fill In The Blanks Using Proper Works:

Question a. Rubber made by vulcanization is a — material.
Answer: hard
In simple words: Vulcanized rubber is treated to become tough and resistant.

🎯 Exam Tip: Remember that vulcanization makes rubber harder and more durable, a key concept in material science.

Question b. Man-made materials are made by — natural materials.
Answer: processing
In simple words: Man-made materials are created by altering natural raw materials through various processes.

🎯 Exam Tip: The distinction between natural and man-made materials, and the role of processing, is a fundamental concept.

Question c. — thread was developed simultaneously in New York and London.
Answer: Nylon
In simple words: Nylon, a synthetic thread, was invented and developed in two major cities around the same time.

🎯 Exam Tip: Knowing the origin of key synthetic materials like nylon can be helpful for general knowledge and historical context.

Question d. Rayon is also known as —.
Answer: synthetic silk
In simple words: Rayon is a man-made fiber that mimics the look and feel of natural silk.

🎯 Exam Tip: Understanding the common names and properties of synthetic fibers like Rayon is important for identifying their uses.

Answer The Following Questions.

Question a. Why did the need for man-made materials arise?
Answer: The need for man-made materials arose due to the following reasons:
1. To meet the needs of an increasing population.
2. Human nature to try to make life more comfortable.
3. They can be made available in plenty at a low cost.
4. The reserve of natural substances is decreasing.
In simple words: Man-made materials became necessary due to a growing population, the desire for comfort, cost-effectiveness, and the depletion of natural resources.

🎯 Exam Tip: When explaining the need for man-made materials, focus on factors like population growth, resource scarcity, and economic advantages.

Question b. Which are the natural materials obtained from plants and animals?
Answer: Leather, jute, wool, cotton, silk are the natural substances obtained from plants and animals.
In simple words: Natural materials from living organisms include leather and wool from animals, and jute, cotton, and silk from plants or insects.

🎯 Exam Tip: Categorize natural materials by their origin (plant or animal) to easily recall examples.

Question c. What is vulcanization?
Answer:
1. Vulcanization is the process in which rubber is heated with sulphur for three to four hours.
2. Sulphur is mixed to give hardness to rubber.
3. The proportion of sulphur depends on the purpose for which the rubber is to be used.
In simple words: Vulcanization is a chemical process that involves heating rubber with sulfur to make it harder, stronger, and more elastic, improving its overall properties.

🎯 Exam Tip: Highlight the key components of vulcanization: heating, sulfur, and the resulting improvement in rubber's hardness and durability.

Question d. Which natural materials are used to obtain fibres?
Answer: Cotton, wood pulp and various hydrocarbons obtained from mineral oils are used to obtain fibres.
In simple words: Fibers are primarily obtained from natural sources like cotton plants and wood pulp, as well as from hydrocarbons derived from mineral oils.

🎯 Exam Tip: Remember common sources for natural fibers like plants (cotton, wood pulp) and the raw materials used for synthetic fibers (hydrocarbons from mineral oils).

What Are We Used For?

Question a. What are we used for?
Answer:
1. Soil: It supports plant life and hence indirectly supports all living things. It is used for making clay pot, utensils, bricks etc.
2. Wood: It is used in paper industry. It is also used to make furniture.
3. Nylon: It is used to manufacture clothes, fishing nets, ropes, etc.
4. Paper: It is used in our textbooks, note books, currency notes, etc.
5. Rubber: It is used in the manufacture of erasers, tyres, rubber toys, rubber bands, etc.
In simple words: Various materials like soil, wood, nylon, paper, and rubber have diverse uses, from supporting life and making furniture to creating fabrics, stationery, and durable goods.

🎯 Exam Tip: When listing uses, provide diverse examples for each material to show a comprehensive understanding of their applications.

How Is Paper Manufactured? Write In Your Own Words.

Question a. How is paper manufactured? Write in your own words.
Answer: Coniferous trees like pine trees are used to make paper.
1. The bark of the logs of these trees is first removed and the wood is broken into small pieces.
2. The mixture of these pieces with some chemicals is kept soaked for a long time to form pulp.
3. On completion of chemical process, fibrous substances from wood pulp are separated and some dyes are added.
4. The pulp is then passed through rollers, dried to form paper and finally wound on reels.
In simple words: Paper is made from wood pulp, where tree logs are processed into small pieces, chemically treated to form a pulp, and then rolled, dried, and reeled into finished paper.

🎯 Exam Tip: Describe the paper manufacturing process in a step-by-step manner, focusing on the transformation from wood to pulp to paper sheets.

Give Scientific Reasons.

Question a. We must use cotton clothes during summer.
Answer:
1. During summer we sweat more due to high temperature.
2. Cotton clothes absorb sweat.
3. Synthetic clothes are water repellent. They do not absorb sweat and we feel uncomfortable. Hence we must use cotton clothes in summer.
In simple words: Cotton clothes are best for summer because they absorb sweat and allow air circulation, keeping us cool and comfortable, unlike synthetic fabrics which repel moisture.

🎯 Exam Tip: Explain the properties of cotton (absorbent, breathable) and synthetics (water repellent) to justify the choice of clothing for different seasons.

Question b. We must observe economy in the use of materials.
Answer:
1. Due to excessive use of natural substances by human beings to fulfil their needs; they are getting depleted at a faster rate.
2. At the same time, it takes a very long time for these substances to get naturally formed again.
3. Hence, we must observe economy in the use of materials so that they are available for the future generation also.
In simple words: We must use materials sparingly because natural resources are finite and deplete quickly, while their regeneration takes a very long time, threatening future availability.

🎯 Exam Tip: Emphasize sustainability and the long-term impact of resource consumption when discussing the importance of economical material use.

Question c. Saving paper is the need of the hour.
Answer:
1. Saving paper means saving trees as wood is used as the raw material to manufacture paper.
2. Trees are natural habitat for many Living things.
3. Trees help in increasing rainfall and water availability. Hence, saving paper helps in saving trees which in turn maintains balance in nature.
In simple words: Saving paper is crucial because it directly conserves trees, which are vital for maintaining biodiversity, increasing rainfall, and preserving ecological balance.

🎯 Exam Tip: Connect saving paper to environmental benefits like forest conservation, habitat protection, and maintaining the water cycle for a comprehensive answer.

Question d. Man-made materials have more demand.
Answer:
1. Man-made substances are waterproof, lightweight and easy for transportation. Substances in Daily Use
2. They are easier to use and can be made available in plenty at a low cost. Hence, there is more demand for man-made materials.
In simple words: Man-made materials are highly demanded because they offer desirable properties like being waterproof and lightweight, are easily transportable, readily available, and affordable.

🎯 Exam Tip: Focus on the practical advantages and economic benefits of man-made materials, such as their specific properties, availability, and cost-effectiveness.

Question e. Humus is a natural material.
Answer:
1. Humus is obtained from plant and animal wastes.
2. Micro-organisms act on these wastes and convert them into humus.
3. Hence, humus is a natural material.
In simple words: Humus is a natural material formed from decomposed plant and animal waste by microorganisms, enriching the soil with organic matter.

🎯 Exam Tip: Explain the biological origin and decomposition process that leads to the formation of humus, classifying it as a natural substance.

Find Out.

Question 1. How is lac obtained from nature?
Answer:
1. Lac is a resinous substance secreted from the glands present in the skin of female lac insect.
2. Lac insects live on the Palash trees. In India lac is mainly produced in the states of Rajasthan and Bihar.
In simple words: Lac is a natural resin produced by female lac insects, commonly found on Palash trees, particularly in Rajasthan and Bihar in India.

🎯 Exam Tip: Remember that lac is an animal-originated product, specifically from insects, and note its geographical production centers in India.

Question 2. How are pearls obtained?
Answer:
1. Pearls are formed when a foreign particle such as a grain of sand or a small particle of rock accidentally enters the space between the mantle and shell of an oyster's body.
2. Oysters cannot reject the particle, and as a defence mechanism its produces a shining coating called nacre on the particle layer by layer.
3. As the shiny layers get added, a pearl is formed.
4. Cultured pearls are artificially formed by inserting a bead in oyster shell and allowed to coat it with nacre over several years.
In simple words: Pearls form when an irritant enters an oyster, causing it to secrete nacre, which layers around the particle to create the lustrous gem; cultured pearls are formed similarly but with a human-introduced bead.

🎯 Exam Tip: Differentiate between natural and cultured pearls by explaining the role of a foreign particle and the oyster's nacre secretion process.

Activity:

Question 1. Visit a rubber, paper or textile industry in your area and collect information about it.
Answer:
In simple words: This activity involves practical research by visiting an industry to understand the manufacturing processes of rubber, paper, or textiles.

🎯 Exam Tip: For activity-based questions, describe the steps taken and the type of information collected during the visit to demonstrate active learning.

Question 2. Collect various samples of paper and note their uses.
Answer:
In simple words: This task requires gathering different types of paper and identifying their specific applications, such as for writing, packaging, or printing.

🎯 Exam Tip: When detailing observations from samples, mention characteristics like thickness, texture, and strength, and how these relate to their uses.

Question 3. Use blank pages from old note-books and make a new one.
Answer:
In simple words: This activity demonstrates recycling by repurposing unused pages from old notebooks to create new paper, highlighting resource conservation.

🎯 Exam Tip: Describe the process of making new paper from old pages, focusing on steps like shredding, pulping, and drying, and the outcome.

Class 6 Science Chapter 6 Substances In Daily Use Important Questions And Answers

Fill In The Blanks Using Proper Works.

Question 1. Natural rubber is obtained from — of trees.
Answer: latex
In simple words: Natural rubber is derived from latex, a milky sap extracted from specific rubber trees.

🎯 Exam Tip: Remember that latex is the raw form of natural rubber, sourced directly from trees.

Question 2. Changes where the original constituent substances cannot be obtained again from the new substances are called — changes.
Answer: irreversible
In simple words: Irreversible changes are those chemical or physical transformations where the original materials cannot be recovered from the new substances formed.

🎯 Exam Tip: Differentiate between reversible and irreversible changes by focusing on whether the original substances can be retrieved.

Question 3. A paper factory in Maharashtra is situated at —.
Answer: Ballarpur
In simple words: Ballarpur is a significant location in Maharashtra known for its paper manufacturing industry.

🎯 Exam Tip: Be aware of geographical facts related to industries, such as the location of major factories.

Question 4. Glass can be made from — and —.
Answer: sand, calcium
In simple words: Glass is typically manufactured using sand (silica) and calcium compounds, along with other additives.

🎯 Exam Tip: Recall the primary raw materials for glass production: sand (silica) and calcium, among others.

Question 5. Botanical name of rubber plant is —.
Answer: Hevea brasiliensis
In simple words: The scientific name for the rubber plant, which produces natural rubber, is Hevea brasiliensis.

🎯 Exam Tip: Learn the botanical names of important plants, especially those with industrial significance.

Question 6. — obtained from mineral oils are used to make polymer chains.
Answer: Hydrocarbons
In simple words: Hydrocarbons, derived from mineral oils, are the building blocks used to create long polymer chains for various synthetic materials.

🎯 Exam Tip: Understand that hydrocarbons are the fundamental components used in the synthesis of polymers from mineral oils.

Question 7. The maximum production of rubber in India is in —.
Answer: Kerala
In simple words: Kerala is the leading state in India for the production of natural rubber.

🎯 Exam Tip: Know the major producing regions for key natural resources within India, such as Kerala for rubber.

Question 8. — invented the process of vulcanisation.
Answer: Charles Goodyear
In simple words: Charles Goodyear is credited with discovering and developing the vulcanization process for rubber.

🎯 Exam Tip: Recognize important inventors and their contributions, like Charles Goodyear and vulcanization.

Match The Columns:

Question 1.

🎯 Exam Tip: Carefully classify materials based on their origin: biotic (plant/animal) or abiotic, and whether they are natural or man-made.

State Whether The Following Statements Are 'True' Or 'False'.

Question 1. We can find plastic in nature.
Answer: False
In simple words: Plastic is a synthetic material and does not occur naturally in the environment.

🎯 Exam Tip: Remember that plastics are man-made and do not originate from natural biological or geological processes.

Question 2. Soap is a man-made substance.
Answer: True
In simple words: Soap is produced through a chemical process involving fats or oils and an alkali, making it a man-made substance.

🎯 Exam Tip: Understand that substances resulting from chemical reactions performed by humans are classified as man-made.

Question 3. We should reuse available resources.
Answer: True
In simple words: Reusing resources helps conserve natural materials, reduces waste, and minimizes environmental impact.

🎯 Exam Tip: Emphasize the importance of the 3Rs (Reduce, Reuse, Recycle) in resource management and environmental protection.

Question 4. Nylon clothes are good summer wear.
Answer: False
In simple words: Nylon, being a synthetic and non-absorbent fabric, is generally unsuitable for summer as it traps heat and moisture, leading to discomfort.

🎯 Exam Tip: Recall the properties of nylon (non-absorbent, heat-retaining) to understand why it's not ideal for hot weather.

Question 5. Glass is a man-made substance.
Answer: True
In simple words: Glass is manufactured by melting and cooling raw materials like sand and other minerals, making it an artificial substance.

🎯 Exam Tip: Classify glass as man-made because it requires human processing of natural raw materials at high temperatures.

Question 6. In irreversible changes original substances can be obtained again.
Answer: False
In simple words: Irreversible changes are those where the chemical composition of substances permanently alters, preventing the recovery of the original materials.

🎯 Exam Tip: Clearly distinguish irreversible changes (e.g., burning wood) from reversible ones (e.g., melting ice) by the possibility of regaining the initial state.

Question 7. Rayon is made up of cotton and wood pulp.
Answer: True
In simple words: Rayon is a regenerated cellulose fiber, meaning it's produced from natural sources like wood pulp and cotton linter, chemically processed into a usable fiber.

🎯 Exam Tip: Remember that Rayon, while man-made, originates from natural cellulose sources like cotton and wood pulp, distinguishing it from purely synthetic fibers.

Give Two Examples Of Each Of The Following:

Question 1. Natural fibres
Answer: cotton, silk
In simple words: Cotton and silk are examples of natural fibers, one from a plant and the other from an insect.

🎯 Exam Tip: Always provide examples from both plant and animal origins when asked for natural fibers.

Question 2. Synthetic fibres
Answer: terylene, rayon
In simple words: Terylene and rayon are common examples of synthetic fibers, manufactured through chemical processes.

🎯 Exam Tip: List synthetic fibers like terylene (polyester) and rayon (regenerated cellulose) to show variety.

Question 3. Biotic natural substances
Answer: wool, jute
In simple words: Wool, derived from animals, and jute, from plants, are both natural substances originating from living organisms.

🎯 Exam Tip: Biotic substances are those obtained from living things, such as plants (jute) and animals (wool).

Question 4. Abiotic natural substances
Answer: air, water
In simple words: Air and water are examples of abiotic natural substances, meaning they are non-living components found in nature.

🎯 Exam Tip: Abiotic natural substances are non-living elements of the environment, like air, water, soil, and minerals.

Question 5. Man-made substances.
Answer: paper, glass
In simple words: Paper and glass are created by humans through industrial processes using natural raw materials.

🎯 Exam Tip: Man-made substances are those produced or synthesized by human activity, such as paper and glass.

Classify The Following Substances In The Table Given Below.

Question. (iron, wood, brick, paper, terylene, stone, jute, air, silk, utensils, plastic, rayon, water, wool, dacron, lac, nylon, pearl)
Answer:

🎯 Exam Tip: When classifying, distinguish between materials found naturally, those processed by humans from natural sources, and those entirely synthesized.

Define:

Question 1. Natural substances.
Answer: Substances available in nature are called natural substances.
In simple words: Natural substances are materials that exist and can be found directly in the environment without human intervention.

🎯 Exam Tip: The key characteristic of natural substances is their direct availability and existence in nature.

Question 2. Man-made substances.
Answer: Man-made substances are new substances produced by processing naturally available resources.
In simple words: Man-made substances are new materials created by humans through various processes using existing natural resources.

🎯 Exam Tip: Highlight that man-made substances are a result of human processing and transformation of natural materials.

Question 3. Biotic substances.
Answer: Natural substances obtained from living things are called biotic substances.
In simple words: Biotic substances are natural materials that originate from living organisms, such as plants or animals.

🎯 Exam Tip: Associate biotic substances with living sources (plants, animals) in contrast to non-living (abiotic) sources.

Question 4. Abiotic substances.
Answer: Natural substances that are not obtained from living things are called abiotic substances.
In simple words: Abiotic substances are natural materials found in the environment that are not derived from living organisms.

🎯 Exam Tip: Remember that abiotic substances are non-living components of nature, such as minerals, air, or water.

Question 5. Plant-originated substance.
Answer: A substance obtained from a plant is called a plant-originated substance.
In simple words: A plant-originated substance is any material that is directly derived or harvested from plants.

🎯 Exam Tip: Provide clear examples of plant-originated substances like cotton, wood, or jute.

Question 6. Animal-originated substance.
Answer: A substances obtained from an animal is called an animal-originated substance.
In simple words: An animal-originated substance is any material that comes directly from animals.

🎯 Exam Tip: Give examples such as wool, silk (from silkworms), or leather when defining animal-originated substances.

Question 7. Hydrocarbons.
Answer: Substances obtained from mineral oil are called hydrocarbons.
In simple words: Hydrocarbons are organic compounds primarily composed of hydrogen and carbon atoms, typically derived from fossil fuels like mineral oil.

🎯 Exam Tip: Recognize hydrocarbons as organic compounds from mineral oils, essential for synthetic material production.

Answer The Following In One Or Two Sentences.

Question 1. Why was Rayon named so?
Answer: The threads of Rayon have shine and strength. They appeared to be shining bright like the sun's rays. Hence, they were named 'Rayon.
In simple words: Rayon was named for its radiant, shining appearance, which resembled the bright rays of the sun.

🎯 Exam Tip: Relate the name 'Rayon' to its distinctive shiny quality, which inspired its moniker.

Question 2. How are TV sets, refrigerators, etc. packed? Why?
Answer: To pack TV sets, refrigerators, etc. big cartons and thermocol are used. These man-made substances are water resistant, light weight and easy for transportation.
In simple words: Large appliances like TV sets and refrigerators are packed in cartons with thermocol because these man-made materials are waterproof, lightweight, and protect items during transport.

🎯 Exam Tip: Focus on the protective properties of packaging materials (water resistance, lightweight, ease of transport) as the reason for their use.

Question 3. Give the properties and uses of nylon.
Answer: Nylon threads have a shine and are strong, transparent and water resistant. They are used to manufacture clothes, fishing nets, ropes, etc.
In simple words: Nylon is a shiny, strong, transparent, and water-resistant synthetic fiber used to make clothes, fishing nets, and ropes.

🎯 Exam Tip: List key properties of nylon (shine, strength, water resistance) and then connect them to its practical applications.

Question 4. What is latex?
Answer: Latex is a milky white natural substance produced in the stems of rubber trees.
In simple words: Latex is a milky white sap that naturally exudes from the stems of rubber trees and is the primary source of natural rubber.

🎯 Exam Tip: Define latex as a natural, milky substance from rubber trees, emphasizing its role as the raw material for rubber.

Question 5. Name the basic material used to obtain paper.
Answer: Wood is the basic material used in the manufacture of paper.
In simple words: Wood, specifically wood pulp, is the fundamental raw material from which paper is made.

🎯 Exam Tip: Clearly state wood as the primary natural resource for paper production.

Question 6. What kind of paper is used for currency notes manufacturing?
Answer: Flax fibre is used in the manufacture of currency notes.
In simple words: Currency notes are made from flax fiber, which provides durability and resistance to wear and tear.

🎯 Exam Tip: Note that flax fiber is chosen for currency due to its strength and resistance, crucial for banknotes.

Question 7. Where was the process of making paper invented?
Answer: The process of making paper was invented in China.
In simple words: Paper manufacturing originated in China, marking a significant historical innovation.

🎯 Exam Tip: Remember China as the historical birthplace of paper-making technology.

Answer In Brief:

Question 1. What are the advantages of synthetic fibre?
Answer: Advantages of synthetic fibre are:
1. These fibres can be manufactured on a large scale.
2. They cost less.
3. They are strong and durable.
4. They can be used for a long time.
5. They are water repellent. They dyy easily.
6. They are light weight and comfortable to wear.
7. Clothes made from these threads are wrinkle free and scratch free.
In simple words: Synthetic fibers offer advantages such as large-scale production, low cost, strength, durability, water repellence, quick drying, light weight, and wrinkle-free properties.

🎯 Exam Tip: List a variety of advantages, focusing on manufacturing ease, economic benefits, and desirable material properties to demonstrate comprehensive knowledge.

Question 2. Give the shortcomings of synthetic fibre.
Answer:
1. They are water repellent. Hence, they do not absorb sweat from the skin.
2. Continuous use of these clothes keeps the skin moist which may cause skin diseases.
3. Synthetic clothes are uncomfortable to wear especially in summer.
4. They catch fire easily.
5. If they catch fire, they stick to the skin and cause skin injuries.
6. These fibres are not decomposed by micro-organisms.
In simple words: Synthetic fibers have drawbacks like poor sweat absorption, potential skin issues from moisture retention, discomfort in heat, flammability with severe skin sticking, and non-biodegradability.

🎯 Exam Tip: When discussing shortcomings, include both comfort-related issues (sweat, heat) and environmental concerns (non-biodegradability, fire hazard).

Question 3. Write a short note on natural rubber.
Answer:
1. Rubber is a natural substance obtained by collecting the latex of certain trees.
2. The botanical name of this tree is 'Hevea brasiliensis'
3. In India, the maximum production of rubber is in Kerala.
In simple words: Natural rubber comes from the latex of Hevea brasiliensis trees, with Kerala being India's primary producer.

🎯 Exam Tip: For a short note, include the origin (latex), botanical name, and major production area to cover essential facts about natural rubber.

Give Scientific Reasons

Question 1. Natural substances are depleting.
Answer:
1. Due to increase in population there is an increase in demand. To meet this demand, natural substances are used to a greater extent.
2. Due to human nature to make his life more comfortable, he learnt to use natural resources and also began to process them to make new substances. Hence natural substances are depleting at an alarming rate.
In simple words: Natural substances are being used up faster than they can regenerate due to growing population needs and human desire for comfort, leading to their rapid depletion.

🎯 Exam Tip: Focus on linking population growth and human behavior to the accelerated consumption and depletion of natural resources for higher scores.

Can You Tell?

Question 1. Difference between leather, jute, wool, cotton and soil, water, metals.
Answer:
1. Leather, jute, wool, cotton are biotic natural substances.
2. Soil, water, metals are abiotic natural substances.
In simple words: Leather, jute, wool, and cotton come from living organisms (plants or animals), making them biotic, whereas soil, water, and metals are non-living, making them abiotic.

🎯 Exam Tip: Clearly distinguish between biotic (derived from living things) and abiotic (non-living) classifications for materials.

Question 2. How are leather and wool different from jute and cotton?
Answer: Leather and wool are obtained from animals while jute and cotton are obtained from plants.
In simple words: Leather and wool are animal products, while jute and cotton are plant products.

🎯 Exam Tip: Remember the origin (animal or plant) of common natural fibers and materials.

Question 3. Do you find plastic, nylon, brass or cement in nature?
Answer: No, they are all man-made materials.
In simple words: Plastic, nylon, brass, and cement are not found naturally; they are all manufactured by humans.

🎯 Exam Tip: Understand that many common materials are not natural but are products of human manufacturing processes.

Question 4. Can red chillies become green chillies again?
Answer: No, the change from green chillies to red chillies is irreversible.
In simple words: Once green chillies ripen and turn red, they cannot revert to their green state, as this is an irreversible chemical change.

🎯 Exam Tip: Identify examples of irreversible changes in everyday life, understanding that once a chemical change occurs, the original substance cannot be easily recovered.

Question 5. From which substances in nature can we get threads or fibre?
Answer: Cotton plant, jute, silkworm.
In simple words: We can obtain natural threads and fibers from sources like the cotton plant, jute plant, and silkworms.

🎯 Exam Tip: List common natural sources of fibers used for making textiles.

Question 6. What are clothes made from?
Answer: Clothes are made from yarn obtained from fibre.
In simple words: Clothes are manufactured using yarn, which is spun from various types of fibers.

🎯 Exam Tip: Understand the basic process that clothes are made from fibers which are spun into yarn.

Classify The Following Substances According To Their Uses:

Question. Classify the following substances according to their uses: sand, soap, wool, window glass, bamboo, cotton, bricks, silk, leafy vegetables, cement, fruits, water, sugar.
Answer:
• For construction: Sand, window glass, bamboo, bricks, cement.
• As food: Leafy vegetables, fruits, water, sugar.
• At home: Soap for cleaning.
• For clothes: Wool, cotton, silk.
In simple words: Substances can be categorized based on their primary uses, such as for building (sand, cement), consumption (vegetables, water), household cleaning (soap), or clothing (wool, silk).

🎯 Exam Tip: Be able to group various materials by their practical applications in daily life.

Make A List Of Objects, Each Of Which Can Be Made From Several Substances

Question. Make a list of objects, each of which can be made from several substances.
Answer:

🎯 Exam Tip: Provide diverse examples of objects that demonstrate versatility in material use.

Use Your Brain Power!

Question 1. Complete the table below, showing how substance of daily use are classified.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख 'दैनिक उपयोग के पदार्थ' का वर्गीकरण एक फ्लोचार्ट के रूप में दिखाता है। इसमें दर्शाया गया है कि पदार्थ प्राकृतिक या मानव-निर्मित हो सकते हैं। प्राकृतिक पदार्थों को आगे अजैविक (Abiotic) और जैविक (Biotic) में बांटा गया है, जिसमें जैविक पदार्थों को फिर से पौधों से प्राप्त (Plant Origin) और जानवरों से प्राप्त (Animal Origin) में विभाजित किया गया है।
Answer:
1. Natural
2. Biotic
3. Cement
4. Animal Origin
5. Cotton
In simple words: Substances we use daily can be categorized into natural (like cotton from plants or leather from animals) and man-made (like cement), further breaking down natural into non-living (abiotic) and living-derived (biotic) sources.

🎯 Exam Tip: Be able to classify substances based on their origin (natural or man-made) and, for natural substances, whether they are biotic or abiotic, and their specific biological source.