Woollen fibres are then processed to obtain woollen yarn. Answer: After scouring, sorting is done. NCERT solutions for Class 7 Science have been provided below to aid the students with answering the questions correctly, using a logical approach and methodology. The silk fibre from the cocoon of this moth is soft, lustrous and elastic and can be dyed in beautiful colours. Fibre to Fabric Class 7 Extra Questions and Answers Science Chapter 3. Larvae of silk moth are called silkworms. Silk industry began in China and was kept a closely guarded secret for hundreds of years. Question from very important topics are covered by NCERT Exemplar Class 7.. You also get idea about the type of questions and method to answer in your Class 7th examination. These wool-yielding animals bear hair on their body. Important NCERT Questions Class 7 Science Chapter 2. Rearing silkworms: For obtaining silk, moths are reared and their cocoons are collected to get silk threads. The hairy skin is sent to a factory where hair of different textures are separated or sorted. The silk fibres are separate out. Soil is important for life on earth. For more info feel free to reach us and we will guide you at the earliest possibility. Ans. Answer: Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question … Question 6. Check the below NCERT MCQ Questions for Class 7 Science Chapter 3 Fibre to Fabric with Answers Pdf free download. NCERT Solutions are very helpful for a better understanding of the concepts and self-analysis.. Dyeing: The fibres are dyed in various colours, as the original colour of fleece are usually black white or brown. Apart from grazing sheep, rearers also feed them on a mixture of pulses, corn, jowar, oil cakes (material left after taking out oil from seeds) and minerals. The hair provide woollen fibres. CBSE Class 7th Science solutions provide ample material to enable students to form a good base with the fundamentals of the NCERT Class 7 Science textbook. Silk fibres are then spun into silk threads. Question 7. When the caterpillar is ready to enter the next stage of its life history called pupa, it first weaves a net to hold itself. Once the reared sheep have developed a thick growth of hair, hair is shaved off for getting wool. Answer: Name the most common silk moth found in India. Answer: Hope the knowledge provided regarding the Fibre to Fabric Class 7 Extra Questions and Answers has helped you to the possible extent. Classification of objects into hot and cold objects using activity is presented in tabular form. Name some wool yielding animals. Draw figures to describe life history of silk moth. Toll Free No. This enables sheep to survive without their protective coat of hair. Answer: Wool yielding animals are sheep, yak, llama, […] Solving the Motion and Time Multiple Choice Questions of Class 7 Science Chapter 13 MCQ can be of extreme help as you will be aware of all the concepts. This is done when mulberry trees bear a fresh crop of leaves. After 25 to 30 days, the caterpillars stop eating and move to a tiny chamber of bamboo in the tray to spin cocoons. Question 10. Shearing: Once a sheep develops a thick coat of hair, it is shaved off to obtain wool. Silk fibres are then spun into silk threads, which are woven into silk cloth by weavers. Which types of food taken by the “mulberry silk moth”? Reeling is done with special machines, which unwind the threads or fibres of silk from the cocoon. The worms are then kept in clean bamboo trays along with freshly chopped mulberry leaves. The caterpillar or silk worm spins the cocoon inside which develops the silk moth. Check the below NCERT MCQ Questions for Class 7 Science Chapter 3 Fibre to Fabric with Answers Pdf free download. Thus, tassar silk, mooga silk, kosa silk, etc., are obtained from cocoons spun by different types of moths. Solving the Fibre to Fabric Multiple Choice Questions of Class 7 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. Students can solve these Fibre to Fabric Class 7 MCQs Questions with Answers and assess their preparation level. The fibres can be dyed in various colours, as the natural fleece of sheep and goats is black, brown or white. What Policies Can Help Students Affected by COVID-19? For getting pure silk, it can be rear in any sort of climate while artificial silk created in definite chemical and temperature. Sorting: In this step, different textures of hair are separated or shorted. Doing these questions along with NCERT Solutions of Chapter 3 of Class 7 Science, is provides an ample practice for the preparation of exams and school tests. Question 2. Reared sheep eat grass and leaves. What are silkworms? This process is called shearing. How is rearing of silkworm done? Answer: Students can download 7th Science NCERT Solutions for the session 2020-21 based on latest NCERT Books 2020-2021. Question from very important topics are covered by NCERT Exemplar Class 7.. You also get idea about the type of questions and method to answer in your Class 7th examination. Answer: But sorter’s job is risky as sometimes they get infected by a bacterium, anthrax, which causes a fatal blood disease called sorter’s disease. It is done by the machine similarly, to those used by barbers to remove hairs. The rearing of silkworms for obtaining silk is called sericulture. Finally, it comes out of the cocoon as silk- moth. Question 2. For easy access, we at BYJU’S provide free Class 7 Science NCERT Solutions for all chapters in PDF format. What will happen if cocoon is not boiled or exposed to steam? Sheep are herbivores and prefer grass and leaves. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination.Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. This covering is known as cocoon. Extra Questions for Class 7 Science Chapter 3 Fibre to Fabric with Answers. CBSE students can refer to NCERT Solutions for Class 7 Maths Chapter 3 Data Handling InText Questions and Answers are provided by experts in order to help students secure good marks in exams. Question 4. Class 7 Science Chapter 3 Important Questions and Keywords of Fibre to Fabric updated for new academic session 2020-21. Question 8. NCERT Grade 7 Science, Chapter 3, Heat deals with the basic concepts that a student would require to gain knowledge about heat and its associated principles. October 14, 2020. What is the most common silk moth? This is the wool ready to be drawn into fibres. They are mainly reared in areas with low rainfall. Free PDF download of Important Questions with solutions for CBSE Class 7 Science Chapter 3 - Fibre to Fabric prepared by expert Science teachers from latest edition of CBSE (NCERT) books. After scouring, sorting is done. The fur (hair) on the body of camels is also used as wool. Question 3. Describe the life history of silk moth. The longer fibres are made into wool for sweaters and the shorter fibres are spun and woven into woollen cloth. Soon the caterpillar completely covers itself by silk fibres. Separating burrs: Burrs are small fluffy fibres which are picked out from the hair. Question 2. Soil. How is shearing of wool done? The whole method from collecting cocoons to obtaining thread through reeling process, called processing of silk. Answer: They grow in size and when the caterpillar is ready to enter the next stage of its life history called pupa, it first weaves a net to hold itself. The farmers keep eggs under hygienic conditions and under suitable conditions of temperature and humidity. For any further suggestions, users are welcome. The fine hair provides the fibres for making wool. Then it swings its head from side to side in the form of the figure of eight (8). It contains solved questions of all the topics from the NCERT Class 7 textbook. Answer: Question 1. Chapter 2 Nutrition in animals. After 25 to 30 days, the caterpillars stop eating and move to a tiny chamber of bamboo in the tray to spin cocoons and small racks or twigs may be provided in the trays to which cocoons get attached. Goat, yak and some other animals air and becomes silk fibre from the inside... 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