4. What is the process of washing wool called?
5. Name a disease which is commonly found in the
Science-7
6. How many cocoons are needed to produce one
Short Answer Questions :
1. What is fibre? Name two types of fibres.
2. Write the factors that determine the quality of
Answers
Answer:
4.scouring
5. The most common and serious vaccine-preventable diseases tracked by the World Health Organization (WHO) are: diphtheria, Haemophilus influenzae serotype b infection, hepatitis B, measles, meningitis, mumps, pertussis, poliomyelitis, rubella, tetanus, tuberculosis, and yellow fever.
6.It takes roughly 2,500 cocoons to produce a pound of raw silk. A silk thread is comprised of several filaments, and several threads can be plied to form a yarn.
short answer questions-
1. Fibre is a thread or filament from which a vegetable tissue, mineral substance, or textile is formed.
There are two types of fibres – One is natural fibres which are obtained from natural sources e.g. Cotton, silk, wool and other is synthetic fibres which are man-made for example – rayon, nylon, acrylic etc.
2.Many factors determine the quality (and value) of wool. These include fiber diameter, crimp, yield, color, purity, and staple length and strength. Fiber diameter, also called fineness, is the actual measurement of the thickness of the wool fiber.