Question:
When we bum nylon, why we do not get the smell of burning paper or burning hair?
Answer:
Nylon is a synthetic fibre made from chemicals. On burning nylon these chemicals don't produce the smell of burning paper or hair which are natural substances.
Fibre to Fabric
Q 1.
What type of soil is used to grow cotton plants?
Q 2.
How many types of fibres are there?
Q 4.
Name some modem fabrics formed by unstitched piece of fabric.
Q 5.
Name two synthetic fibres.
Q 6.
How are fabrics prepared?
Q 7.
Where does cotton wool come from.?
Q 10.
Name the process used to prepare fabrics from yams.
Q 11.
What are yarns made of?
Q 12.
When we bum wool why do we get the smell of hair bum?
Q 13.
Name the thing which is used to make fabric.
Q 14.
From which part of the plant cotton and jute are obtained?
Q 15.
Name two varieties of cloth materials which are commonly used.
Q 16.
Name two natural fibres.
Q 17.
What do you observe when you are visiting a nearby tailoring shop?
Q 18.
Name the states where jute plants are mainly grown in India.
Q 19.
Fill in the blanks:
(a) Plant fibres are obtained from____________ and___________ .
(b) Animal fibres are___________ and___________ .
Q 20.
What are natural fibres? Explain with examples.
Q 21.
How are natural fibres better than synthetic fibres?
Q 22.
What happens when a yam from a tom sock is pulled?
Q 23.
Define ginning of cotton.
Q 24.
Name two items that are made from coconut fibre.
Q 25.
Name two methods of knitting.
Q 26.
Name two hand-operated devices used for spinning.
Q 28.
Explain the process of making yam from fibre.
Q 29.
What are fruits of cotton plants called?
Q 30.
What were the materials used by people in ancient times in place of clothes?
Q 31.
Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute.
Q 32.
What are synthetic fibres?
Q 33.
Name some fabrics in your surroundings.
Q 34.
When we bum nylon, why we do not get the smell of burning paper or burning hair?
Q 35.
List the steps involved in the preparation of fabric.
Q 36.
Cotton on burning gives paper burning smell and cotton is obtained from plants. Is paper also obtained from plants?
Q 38.
State whether the following statements are ‘true' or false':
(a) Yam is made from fibres.
(b) Spinning is a process of making fibres.
(c) Jute is the outer covering of coconut.
(d) The process of removing seeds from cotton is called ginning.
(d) Weaving of yam makes a piece of fabric.
(e) Silk fibre is obtained from the stem of a plant.
(g) Polyester is a natural fibre.
Q 39.
Describe the process of spinning and weaving.
Q 41.
What material you use for making wicks for oil lamps?
Q 42.
What happened when people began to settle in agricultural communities?
Q 43.
Are all fibres produced by plants?
Q 44.
Where were the cotton and flax plants cultivated in ancient Egypt?
Q 45.
Describe the process of the formation of yam from cotton wool.
Q 46.
Explain how jute is obtained from the jute plant.
