Chemistry Fibre to Fabric Part 8 (Question) Class 7 VII

TL;DR

This video discusses the process of obtaining wool and silk from animals, covering topics such as rearing, shearing, and the life cycle of silk worms.

Transcript

Hello friends this video on fiber and fabric part 8 is brought to you by exam fear.com no more fear from exam discuss in class 8th so with this we have reached towards the end of this lesson so let us quickly look at some of the questions question number one you must be familiar with the following nursery rhymes ba black ship have you any wool Mary... Read More

Key Insights

• 🐑 Wool is obtained from the skin of animals like sheep, and shearing is the process of removing the wool.
• ❓ Fleece is the woolly covering of a lamb and is used to make various products.
• 💁 Silk worms are caterpillars that undergo a life cycle, eventually forming cocoons and producing silk.
• 🤠 Rearing involves taking care of animals like cows and silk worms for better-quality products.
• 💀 Shearing doesn't harm wool animals, as the layer of skin removed is dead.
• 🪱 Silk worm rearing, known as sericulture, requires maintaining proper conditions for egg production and larval development.
• 😨 The video emphasizes the importance of rearing and proper care for animals to obtain useful products like milk and silk.

Questions & Answers

Q: Which parts of the black sheep have wool?

The wool is found on the outermost covering of the sheep, which is the skin. The entire body is covered in woolly hair.

Q: How do we get wool from sheep?

Wool is obtained by shearing the woolly covering of sheep. This process involves removing the wool along with a thin layer of skin, which does not harm the sheep.

Q: What is meant by white fleece?

White fleece refers to the woolly covering of a lamb. It is the hair or fur of the lamb, which is used to make textiles and other woolen products.

Q: Is a silk worm a caterpillar?

Yes, a silk worm is a caterpillar. It is also considered a larva, which is a stage in the life cycle of a silk moth. The silk worm hatches from eggs and later forms a cocoon to produce silk.

Summary & Key Takeaways

• The video explains that the outermost covering of a black sheep is called wool, which is obtained from the skin of the animal.

• It states that fleece is the woolly covering of a lamb and that it is used to make various products.

• The video also explores the life cycle of silk worms, from being caterpillars to forming cocoons and producing silk.