Question 11 Mark
Name the stage next to caterpillar in the life cycle of silk moth.
Answer
View full question & answer→The stage next to caterpillar in the life cycle of silk moth is called pupa.
Questions · Page 1 of 2
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Test yourself on this topic
50 questions · timed · auto-graded
Question 21 Mark
Why do people prefer wearing cotton clothes in humid weather?
Answer
View full question & answer→ In humid weather, people tend to sweat more. Cotton fabric being a good absorber absorbs sweat faster than any other fabric and hence keeps people comfortable.
Question 31 Mark
Why are two thick cotton sheets warmer than one single blanket?
Answer
View full question & answer→The air captured between two thick cotton sheets is much more than in a single blanket. Therefore, there is more insulation in cotton sheets and thus they are warmer.
Question 41 Mark
Define a fibre.
Answer
View full question & answer→ A fibre is a long strong thread, which is obtained from natural sources like plants or manmade sources like synthetic fibres, e.g: Rayon.
Question 51 Mark
Name the natural fibre obtained from insects.
Answer
View full question & answer→Silk.
Question 61 Mark
What do you mean by carding?
Answer
View full question & answer→Carding is a process in which ‘carding’ machine combs the loose wool fibres into a sheet.
Question 71 Mark
Give reasons for the following: Light coloured cotton clothes are preferred to be worn in summers.
Answer
View full question & answer→Light colours are poor absorbers of heat. So, in summers they keep us cool.
Question 81 Mark
Define sericulture.
Answer
View full question & answer→The rearing breeding and management of silkworms for obtaining silk is called sericulture.
Question 91 Mark
Why sheep have a thick coat of hair on their body?
Answer
View full question & answer→The thick coat of hair on their body traps a lot of air. Air is a poor conductor of heat, thus, hair keeps sheep warm.
Question 101 Mark
Name the goats which are found in Tibet and Ladakh.
Answer
View full question & answer→ In Tibet and Ladakh, angora goats are found.
Question 111 Mark
Fill in the blanks in the following statements. Wool yielding animals bear ________ on their body.
Answer
View full question & answer→Wool yielding animals bear fleece (hair) on their body.
Question 121 Mark
State whether the following statements are True or False. If false, correct them. In India, camels and goats are generally reared for obtaining wool.
Answer
View full question & answer→False.
Sheep are mostly reared for wool in India.
Sheep are mostly reared for wool in India.
Question 131 Mark
In which part, the wool yielding animals liama and alpaca are found?
Answer
View full question & answer→Liama and alpaca are found in South America.
Question 141 Mark
What do you mean by cocoon?
Answer
View full question & answer→Caterpillar in its later stage of development completely covers itself by silk fibres and turns into pupa. This covering is known as cocoon.
Question 151 Mark
Rampur bushair and Bakharwal are the breeds of which animal-sheep or goat?
Answer
View full question & answer→Rampur bushair and Bakharwal are the breeds of sheep.
Question 161 Mark
Name the most common silk moth.
Answer
View full question & answer→Mulberry silk moth.
Question 171 Mark
What is ginning?
Answer
View full question & answer→ The process of removing seed from cotton called ginning.
Question 181 Mark
Fill in the blanks in the following statements. Hair trap a lot of ________, which is a poor _________ of heat.
Answer
View full question & answer→Hair trap a lot of Air, which is a poor conductor of heat.
Question 191 Mark
Name two animals of South America that yields wool.
Answer
View full question & answer→Llama and Alpaca.
Question 201 Mark
What are the different sources of wool?
Answer
View full question & answer→ The fleece of sheep is the main source of wool .Apart from that, Angora wool is obtained from angora goats. The fur (hair) on the body of camels is also used as wool like Llama and Alpaca.
Question 211 Mark
Define the term ‘selective breeding’.
Answer
View full question & answer→The process of breeding of selective parents for obtaining special characters in their offspring such as soft under hair in sheep, is termed as selective breeding.
Question 221 Mark
Mention the steps in silk production.
Answer
View full question & answer→The steps in silk production include gathering of cocoons, killing of moths inside them, taking out of threads, i.e., reeling and spinning the fibre into yarn, i.e., throwing.
Question 231 Mark
Which animal material is used to weave fine and soft shawls called Pashmina?
Answer
View full question & answer→Wool of Angora goat.
Question 241 Mark
Which stage in the life cycle of silk moth is called cocoon?
Answer
View full question & answer→The covering of silk fibres inside which the caterpillar covers itself is called cocoon.
Question 251 Mark
Out of scouring or shearing, which process comes first in the production of wool from sheep?
Answer
View full question & answer→ The first step is shearing then scouring.
Question 261 Mark
Name the place where Angora goats are found in plenty.
Answer
View full question & answer→ Hilly region like Jammu and Kashmir.
Question 271 Mark
What is yarn?
Answer
View full question & answer→ Yarn is a long continuous thread that is made up of fibre.
Question 281 Mark
Name the process of taking out silk fibres from the cocoon for use as silk.
Answer
View full question & answer→ The process of taking out threads from the cocoons for use as silk is called reeling the silk.
Question 291 Mark
Figure shows three rings of circles with letters in them. Some of these letters in each ring can form the name of one wool yielding animal. Find the names of these animals. 
Answer
View full question & answer→These animals are yak, camel and sheep.
Question 301 Mark
To which class, animal fibre or plant fibre, artificial silk belongs to?
Answer
View full question & answer→Artificial silk is a plant fibre.
Question 311 Mark
Sheep are herbivores, so which type of feed (or food) is provided by shepherds?
Answer
View full question & answer→Sheep are herbivores, and prefer grass and leaves of various trees. Their food also contain a mixture of pulses, corn, jowar, oil cakes (material left after taking out oil from seeds) and minerals.
Question 321 Mark
State whether the following statements are True or False. If false, correct them.Yak hair are not used to make woollen fabric.
Answer
View full question & answer→False. Explanation: Wool can be made from sheep, yak, llama, camel, alpaca and goats.
Question 331 Mark
What term is used for the following process? Washing of sheep’s fleece to remove dust, dirt, dried sweat and grease.
Answer
View full question & answer→ Scouring.
Question 341 Mark
Write the maximum length of continuous silk thread that can be obtained from a cocoon.
Answer
View full question & answer→The maximum length of continuous silk thread that can be obtained from a cocoon is more than that of 1000 feet (1000 to 1500 feet) continuous in length.
Question 351 Mark
Write the name of the animal from which wool for pashmina shawls is obtained.
Answer
View full question & answer→Kashmiri goats.
Question 361 Mark
In which part of India, yak wool is common?
Answer
View full question & answer→Yak wool is common in the hilly regions of Ladakh.
Question 371 Mark
Out of the following, which are the two terms related to silk production? Sericulture, floriculture, moriculture, apiculture and silviculture.
Hints:
- Silk production involves cultivation of mulberry leaves and rearing silkworms.
- Scientific name of mulberry is Morus alba.
Answer
View full question & answer→ Sericulture and moriculture.
Question 381 Mark
Name some varieties of silk.
Answer
View full question & answer→ Mulberry silk, tassar silk, eri silk, Mooga silk etc.
Question 391 Mark
Name the country which is the largest producer of silk.
Answer
View full question & answer→China.
Question 401 Mark
Caterpillars should be collected from bare hand or not?
Answer
View full question & answer→ No.
Question 411 Mark
Name some Indian breed of sheep.
Answer
View full question & answer→ Lohi, Rampur, bushair, Nali, Bakharwal, Marwari and Patanwadi.
Question 421 Mark
Various steps involved to obtain wool from fleece are given here.
- Picking out the burrs.
- Dyeing in various colours.
- Shearing.
- Scouring.
- Sorting.
Answer
View full question & answer→The correct sequence is: Shearing → Scouring → Sorting → Picking out the burrs → Dyeing in various colours.
Question 431 Mark
Define spinning.
Answer
View full question & answer→ The process of making yarn from fibres is called spinning.
Question 441 Mark
What do you mean by scouring?
Answer
View full question & answer→ The sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt. This process is known as scouring.
Question 451 Mark
Name a strongest variety of silk.
Answer
View full question & answer→Mooga.
Question 461 Mark
Does shearing hurts the sheep?
Answer
View full question & answer→Shearing does not hurt the sheep because the uppermost layer of the skin is dead. Also, the hair of sheep grows again just as our hair does.
Question 471 Mark
Two fibres are made up of proteins. Name them.
Answer
View full question & answer→Silk and wool are two fibres which are made up of proteins.
Question 481 Mark
Define weaving.
Answer
View full question & answer→ Weaving is the process of arranging two sets of yarns together to make a fabric.
Question 491 Mark
Name the sources of obtaining fibres.
Answer
View full question & answer→The sources of obtaining fibres are plants and animals.
Question 501 Mark
Name some wool yielding animals.
Answer
View full question & answer→Wool yielding animals are sheep, yak, llama, alpaca, angora goat, angora rabbit and camel.