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Subject:

science-chemistry

Class:

class VI

Key Concepts

fabric, fiber, yarn, spinning, weaving, ginning, knitting, combing, manmade

essential questions

1. What is the process of fiber to fabric?
2. How do the textile's appearance and performance depends on the fiber content, type of yarn and fabric construction?
3. What are the properties of each fiber and how do they affect the textile products?
4. How are fibers made into yarns?

Remembering:

1.Select the option that correctly fills the blanks in the given sentences.

Seed, jute Retting, yarn, terrycot , silver

a) _____ of a flax plant provides fibers.

b) ____ is the cheapest natural fiber

c) the process of separating cotton fibers from cotton seeds is called______

d) ______ is obtained by spinning together a bunch of fibres.

e) ______ is a blended fabric

f) The loose fluffy fibers are untangled and combed to form a long soft rope called a_

2. Read the following statements and mark true or false

a) Angora wool is obtained from Angora sheep

b) Spinning is the process of changing fibre to yarn

c) Coir is obtained from fruits of kapok tree

d) The process f removing hair from sheep is called sheering

e) Knitting can be done by using only one yarn

3. Fill in the blanks with the right terms:

The process of making yarn from fibres is called _______. Yarn used for making fabrics. Two main processes are used to make fabrics from yarn. In process _________, two sets of yarn are arranged together to make a fabric while in process _______single yarn is used o make a piece of fabric.

4. Match the column

i)Ginning                                             a) cleaning and disentangling the fibres

ii) Combing                                       b) Brushing and straightening of fibres

iii)Carding                                          c) Bolls

iv) Seed pods                                    d) cotton fibre after being separated from seeds

v)Lint                                                   e) Separating fibres from seed

5. Name 2 plant based fabrics. write 2 features each

6. Write down the correct steps of processing cotton in a flow chart. Define each step.

Spinning, Weaving, Ginning, Carding, Combing

7. Which of the following device is used for weaving? a) Charkha   b)  Hand-loom  c) Hand-spindle  d) Takli

8. Which country first invented silk? a) India   b) China  c) Nigeria   d) Egypt

9. Which fibre is known As “Golden Fibre”? a) Jute fibre   b) Silk fibre c) Synthetic fibre  d) Cotton fibre

10. Yarns is made from very thin strands called: a)  Fibers   b) Looms  c) Silver  d) Weft

11. By using Charkha, Mahatma Gandhi wove, cotton fabric. This was done to encourage people to wear a) Cloth made in the mills of Britain  b)  Cloth made in the mills of South Africa  c) Clothes made of homespun yarn  d)  All of the above

12. Which of the following is not a natural fiber: a)  Cotton  b) Jute   c) Nylon  d) Flax

13.  In which region was cotton grown by Early Indians? A) Regions near river Ganga   b) Regions near river Yamuna  c) Regions near river Sarasvati  d)  Regions near river Brahmaputra

14. Which part of the jute plant is used for getting jute fibre: a) flower  b) stem  c) fruit  d) leaf

15. The basic unit of every cloth is: a) fabric  b) fibre  c) yarn  d) none of these

16. The process of separating fibres of cotton from its seeds is called: a) knitting  b) ginning  c) spinning  d) weaving

17. Silk cotton is fibre obtained from which plant/ tree: a) Cotton plant  b) kapok tree c) jute plant  d) coconut tree

18. Which of the following is not an artificial fibre: a) Rayon  b) Nylon  c) poylester   d) None of these

understanding:

  1. Make appropriate changes in the following paragraph. Cotton plant is annual shrub. It grows in cold climate. Black soil is best suited for the cultivation of this plant. The stems of cotton plant are called cotton bolls. The seeds with cotton fibers are picked from the cotton bolls by hand. After picking up the fibres are separated from the seeds by the process called combing.
  2. If A represents the fiber and R represents the fabric, write the correct order in which R is made from A. Show it in a flow chart.
  3. What is a difference between fiber and thread?
  4. Give a detailed flowchart of various types of fibers with their sources and examples.
  5. Write True or False against each statement:
    1. Weaving is done with machine and Knitting is done with hand only
    2. Weaving uses two sets of yarn while knitting involves only one yarn
    3. Weaving is done for silk only while knitting is done for wool only.
    4. Weaving is done by loom and knitting is done by hand only
  6. Write down the process of jute from plant to making a fibre.
  7. Yarn is woven to get fabric using: a) Charkha  b) Spinning mills  c) Looms  d) Knitting needles
  8. Which of the following will be more stretchable: a) knitted fabric  b) woven fabric  c) Both are equally stretchable d) either a or b
  9. Larva of a silkworm is called: a) nymph  b) maggot  c) caterpillar  d) none of these
  10. Match the following:

1 Cotton—-   a) Smell of charred meat

2. Wool —–b) smell of burning plastic

3. Silk—— c)smell of burning paper

4. synthetic fibre—– d) smell of burning hair

Choose the correct option: a) 1- d, 2-a, 3-b, 4-c   b) 1-b, 2-c, 3- a, 4-d   c) 1-c, 2- d, 3-a, 4-b  d) none of these

 

Application:

  1. Read the following characteristics of a fiber and identify it. Identify the fabric. a) It is a breathable fabric, i.e., the air can pass in and out through its fibers  b) Each fibers is made up of 20-30 layers of coiled cellulose springs.  c) It has moisture absorbing quality d) It has a natural twist that makes it suitable or spinning
  2. Paheli wants to present her friend a gift made of plant fiber. Which out of the following will she select? a) Jute bag  b)  Woollen shawl  c) Silk saree  d)Nylon scarf
  3. Choose the right option among the set of substances not used for making fibers: a) Silk, Chemicals   b) Yak hair, camel hair  c) Husk, bones   d) jute, flax
  4. Beera is a farmer. He has black soil and climate is warm. Which fiber yielding crop should he grow: a) coconut  b) Jute  c) cotton  d) wool
  5.  Boojho wants to make yarn from fiber at home. Which of the following will he use to carry out the task: a) powerloom  b) handloom  c) charkha  d) knitting needles

Analysis:

  1. Two fabrics X & Y burn when brought close to flame of a candle. While burning X shrivels up and produces a heavy odor and Y burns faster than X smells of burning paper. Can you tell what is fabric X and Y made of?
  2. Refer to the given groups 1-4. Each group contains one wrong member. Identify the odd members and select the correct option. Give reasons why it is wrong or right.
    1. Flax; Coir; Wool; Sisal
    2. Cotton; Jute; flax; Hemp
    3. Wool; Cotton; silk; coir
    4. Coir; flax; nylon; wool
  3. Identify X and Y in the given Venn diagram and select the correct option.  a) Y is silk   b)X is polyester  c) Y is cotton  d) X is nylon
  4. Boojho went to a cloth shop. There he found a fabric which was shining and was very smooth to touch. The fabric could be: a) cotton  b) silk  c) jute  d) wool

Evaluation:

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