Write down the occupational hazard which is related to the wool industry. Then it swings its head from side to side in the form of the figure of eight (8). All the solutions are update for new academic session 2020-21. Answer: After scouring, sorting is done. Later on, traders and travellers introduced silk to other countries. The whole method from collecting cocoons to obtaining thread through reeling process, called processing of silk. Nutrition in animals Important … Pure silk fibre made of protein while artificial made of chemical substances. Class 7 students can practice Maths from NCERT Solutions for Class 7 Maths. Discuss the life stages of silkworms from “Pupa to Cocoon”. Dyeing: The fibres are dyed in various colours, as the original colour of fleece are usually black white or brown. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a regular basis. The sheep have fine and soft wool under the hair that grows close to the skin. Classification of objects into hot and cold objects using activity is presented in tabular form. Which animal provides Pashmina shawls? Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 7 so that you can refer them as and when required. Questions from all the topics are covered in the solutions. 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. Tibet and Ladakh. 1. NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals or अध्याय 2 प्राणियों में पोषण in Hindi Medium free to download in PDF file or View online. After 25 to 30 days, the caterpillars stop eating and move to a tiny chamber of bamboo in the tray to spin cocoons. How is silk processed? Small fluffy fibres found in hair of sheep are called burrs. We have included these questions for extra pracitce and help with the concepts. Answer: Question 3. All our solutions for CBSE Class 7 are prepared in accordance with the latest CBSE syllabus, and they are amended from time to time. Rolling: In this process, the fibres are straightened, combed and rolled into yarn. It is done by the machine similarly, to those used by barbers to remove hairs. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Toll Free No. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright 2021 by Tiwari Academy – A step towards Free Education, NCERT Solutions for Class 7 Science Chapter 3, Class 7 Science Chapter 3 Important Questions. What will happen if there are no platelets in the blood? Question 10. In the rearing of silkworms, after 25 to 30 days the caterpillar stops to eating the fresh leaves of mulberry tree and move to a tiny chamber of bamboo in the tray to spin cocoons. The under fur of Kashmiri goat is soft. “Sheep has two types of fibres that form its fleece” – Name them. Reared sheep eat grass and leaves. Reeling is done in special machines, which unwind the threads or fibres of silk from the cocoon. NCERT Solutions 2020-21 are based on latest NCERT Books for the academic session 2020–2021. October 14, 2020. Question 9. Usually, hairs are removed during the hot weather. NCERT Solution for Class 7th Science Chapter 12 Reproduction in Plants comes in the form of a complete solution guide to students with properly labelled diagrams and answering format to all the exercise questions. Write about the food of sheep. The silk fibre from the cocoon of this moth is soft, lustrous and elastic and can be dyed in beautiful colours. Students can get how to tackle different questions easily by solving the Extra Questions for Class 7 Science Question bank on a … Explain the phrase – “Unity is strength” on the basis of the making of fabric from fibre. They are mainly reared in areas with low rainfall. Their parents are specially chosen to give birth to sheep which have only soft under- hair. The worms are then kept in clean bamboo trays along with freshly chopped mulberry leaves. This is called scouring. This process of selecting parents for obtaining special characters in their offspring, such as soft under hair in sheep. She also noticed that they were spinning shiny cocoons around them. Answer: Class 7 Social Science MCQs Questions with Answers Chapter Wise PDF Download. 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. Sheep are reared mainly for the wool. Extra Questions for Class 7 Science Chapter 3 Fibre to Fabric with Answers. It is a fatal blood disease. The cocoons are kept under the sun or boiled or exposed to steam. This is done when mulberry trees bear a fresh crop of leaves. Silk fibres are then spun into silk threads. Woollen fibres are then processed to obtain woollen yarn. Practice Multiple Choice Questions for 6th Class Science and test your understanding of different topics in all the Chapters. What Policies Can Help Students Affected by COVID-19? Answer: When the caterpillar is ready to enter the next stage of its life history called pupa, it first weaves a net to hold itself. This is the wool ready to be drawn into fibres. We have Provided Fibre to Fabric Class 7 Science MCQs Questions with Answers to help students understand the concept very well. Sheep are herbivores and prefer grass and leaves. Answer: The sources of obtaining fibres are plants and animals. 1800-102-5301 Login Or … The fibres can be dyed in various colours, as the natural fleece of sheep and goats is black, brown or white. Ask your doubts related to NIOS or CBSE Board and share your knowledge with your friends and other users through Discussion Forum. Then it swings its head from side to side in the form of the figure of eight (8). October 14, 2020. Larvae of silk moth are called silkworms. Reeling is done with special machines, which unwind the threads or fibres of silk from the cocoon. How does the hair of certain animals help in keeping their bodies warm? What is selective breeding? Nowadays scouring is done by machines. Fabric needs more energy to tear apart as compared to a single fibre. Name the sources of obtaining fibres. NCERT Solutions for Class 9 Science Chapter 3- Atoms and Molecules is a detailed study material prepared by experts. 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