Indicate which kind of fabric you would select to wear/use in the situations given by marking a tick (✓) in the appropriate box. Explain your choice. Situation Cotton Nylon Silk Wool Why? 1. Day at the beach 2. Cousin's wedding 3. Trip to Shimla in winter 4. Rafting trip 5. A winter jacket 6. An umbrella for a rainy day 7. A hat for a sunny day 8. Socks for winter

Cotton is a soft, fluffy staple fibre that grows in a boll, or in a protective case, around the seeds of the cotton plants. It has many advantages, such as its ability to co ntrol moisture, insulate, provide comfort. It is a hypoallergenic, weatherproof and durable fabric. Nylon is the name of a family of synthetic polymers that are commonly used to make a variety of apparel and consumer goods. It has both excellent stren gth and abrasion resistance, allowing it to stand up to any sport. It has a fantastic elastic recovery meaning that fabrics can stretch to their limits without losing their shape. Silk is a natural protein fibre, some forms of which can be woven into textiles. It is used for many types of dresses, including wedding gowns, evening gowns and sarongs. In addition, silk can be used to make dresses, shirts, skirts or scarves. Wool is the hair of certain mammals. Most wool comes from sheep and goats, but wool is also taken from camels, llamas, and special rabbits. It's used for blankets, horse rugs, saddle cloths, carpeting, insulation and upholstery. Situation Cotton Nylon Silk Wool Why? 1. Day at the beach yes Cotton fibres are natural hollow fibres, they are soft and also known as breathable fibres. 2. Cousin's wedding yes Silk looks premium and therefore is used in weeding dresses. 3. Trip to Shimla in winter yes Wool is a great insulator as air is trapped between its fibres forming a barrier. 4. Rafting trip yes Nylon has both excellent strength and abrasion resistance, allowing it to stand up to any sport. 5. A winter jacket yes Wool is a great insulator as air is trapped between its fibres forming a barrier. 6. An umbrella for a rainy day yes Nylon has good resistance to sunlight and does not absorb water. 7. A hat for a sunny day yes They are strong and can stand up against abrasion wear and high temperature. 8. Socks for winter yes Wool is durable and resists wear and tear.

What is artificial silk

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP UP>Q 5

You are given a small piece of fabric that looks like silk. When this fabric is burnt, it smells like burning plastic. Is this fabric mulberry silk or artificial silk? Why?

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP UP>Q 6

The silk cotton tree produces a cotton-like material, often called kapok. This material is wrapped around the tree's seeds (just like in the cotton plant).
Is there any silk in this silk cotton?

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP UP>Q 6

The silk cotton tree produces a cotton-like material, often called kapok. This material is wrapped around the tree's seeds (just like in the cotton plant).
Why do you think this material is called silk cotton?

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP UP>Q 6

The silk cotton tree produces a cotton-like material, often called kapok. This material is wrapped around the tree's seeds (just like in the cotton plant).
Where in India do these kapok trees grow?

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP UP>Q 6

The silk cotton tree produces a cotton-like material, often called kapok. This material is wrapped around the tree's seeds (just like in the cotton plant).
What is kapok used for?

HARD

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP OUT>Q 1

Indicate which kind of fabric you would select to wear/use in the situations given by marking a tick (✓) in the appropriate box. Explain your choice.

Situation	Cotton	Nylon	Silk	Wool	Why?
1. Day at the beach
2. Cousin's wedding
3. Trip to Shimla in winter
4. Rafting trip
5. A winter jacket
6. An umbrella for a rainy day
7. A hat for a sunny day
8. Socks for winter

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP OUT>Q 2

You may have heard of the Silk Road. Find out more about it and answer the following question:
Why was it so called?

MEDIUM

7th CBSE

IMPORTANT

CONCERT Science 7>Chapter 3 - Fibre to Fabric>STEP OUT>Q 2

When did people first start travelling along the 'Silk Road' route?

What is artificial silk?

Important Questions on Fibre to Fabric

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