I. Tick the correct option

1.

Ans: silkmoth

2.

Ans: stem

3.

Ans: white coir

4.

Ans: white coir

5.

Ans: spinning

6.

Ans: fibre-yarn-fabric

II. Identify the natural fibres obtained from plants.

1.

Ans: cotton

2.

Ans: jute 

3. 

Ans: coir 

4. 

Ans:Flax 

5. 

Ans: cotton

III. Answer the following questions in one sentence.

1.

Ans: Cotton, jute, coir fibres are obtained from plants.

2.

Ans: Black soil is good for growing cotton.

3. 

Ans: The jute fibre is obtained from stem of jute plants.

4.

Ans: The soil savers are made of coir.

5.

Ans: Flax fibre is used for making paper to print currency.

IV. Answer the following questions in two sentences.

1.

Ans: The synthetic clothes are not suitable for wearing in summer because they do not absorb moisture.

2.

Ans: Cotton fabrics are used for making clothes.

3.

Ans: Jute Plant grows best in warm, humid climates.

4.

Ans: Jute is used to make bags for planting saplings because jute being biodegradable mixes into the soil after some time.

5.

Ans: The white coir fibres are used to make fishing nets due to its resistance to salt water.

V. Answer in about four to five sentences.

1.

Ans: Cotton clothes are ideal for summer because of its certain properties. Cotton fabric is soft and comfortable. It easily absorbs moisture and allows to evaporate. That is why it keeps the body cool and are ideal for summer.

2.

Ans: The synthetic fibres nylon and polyester melt while they burn. During its burning it gives out a smell of burning plastic and leave behind a hard residue.

3.

Ans: The fibres from jute and flax are obtained from the stems of jute plants and flax plants respectively. Firstly the stems are soaked in water for about 20 days, this softens the tissues from which fibres are separated.

4.

Ans: The uses of coir: 

     a. to make fishing nets.

     b. to make foor mats, door mats, brushes, ropes.

     c. pots to grow plants.

     d. it is also used to fill mattresses.

     e. it is used in padding the interior parts of automobiles.

     f. it is used for packaging 

     g. to make soil saver mats.

5.

Ans: The processes involved in making fabric arr discussed below.

Ginning: Firstly the fibres are separated from the plant parts or animals. This is called ginning. And it is cleaned.

Spinning: The clean fibres are twisted to make yarn (threads). This is called spinning.

Weaving: Two sets of yarn are arranged and weave together with the help of machine or handloom to make fabrics. This is called weaving.

Fabrics can be made from a single yarn also, which is called knitting.