Question

Q.5- Define the following:-

a. Roughage

b. Lustrous objects

Q.6- Answer the following questions:-

a. Describe the process of cudding.

b. Why minerals and vitamins are called protective nutrients?

c. The depth of a well is 1650 cm. Calculate the depth of the well in metres.

d. Give two properties of silk fibre.

e. What are the conductors of electricity?

Q.7- Differentiate between:-

a. Magnetic and non-magnetic substances

b. Natural and man-made fibres​

​

Answer 1

Answer:

5a) Mostly indigestible material in food (such as legumes, whole grains, and vegetables) that promotes elimination of waste from the large intestine : fiber sense 1d Knowing where to get dietary fiber is important because strong evidence now links roughage to good health, weight management and a reduced risk of colon ...

b) Lustrous materials are basically those materials which have a shiny surface. Metals are known to be lustrous materials. For example iron, copper, aluminium gold are metals, and so are lustrous.

6a) Undermasticated food is swallowed and enters the initial sections of the multichambered ruminant stomach—the rumen and the reticulum-—where it is mixed with remains of food and swallowed saliva.

b) VEGETABLES & FRUITS are called protective nutrients. Our body requires Vitamins and Minerals for various vital processes of life and for formation of blood, bones and teeth. These VITAMINS & MINERALS though needed in small quantities are very important for regulating various bodily function.

c) 16.5

d) Silk has a smooth, soft texture that is not slippery, unlike many synthetic fibers. Silk is one of the strongest natural fibers, but it loses up to 20% of its strength when wet. It has a good moisture regain of 11%. Its elasticity is moderate to poor: if elongated even a small amount, it remains stretched.

e) silver.

copper.

gold.

aluminum.

iron.

steel.

brass.

bronze.

7a)Magnetic substances are substances that get attracted to magnets. Few of the magnetic substances are - iron, steel, cobalt and nickel.

Non-magnetic substances are substances that do not get attracted by a magnet. Few of the materials are wood, plastic, copper, rubber.

b) Natural fibres are fibres made by nature. Typical examples are cotton and wool, which are mainly used in textile clothing but there are many often natural fibres produced in smaller quantities such as e.g. silk, flax or hemp. Man-made fibres (MMF) are fibres made by man. MMF can be organic or inorganic.

Hope this may helpful my friend.

Answer 2

Q5.a. Roughage is essential fiber which helps stomach to digest other food materials.

b. Lustrous materials are those that have a shine on them. Due to this property metals are widely used for making jewellery.

Q6. a. cudding happens mainly in ruminants which is the partially digested food stored in rumen.

b.minerals and vitamins are required for the processes of life and for formation of blood.

c. the depth of the well is 15.5 m

d. Silk fiber is a protein fiber from silk glands of an insect. Cultivation of silkworm is known as sericulture.

e. conductors of electricity are the allows the electric flow. For ex. copper

Q7. a. Magnetic substances - are those who are attracted towards the magnet, For Ex. iron, nickel and cobalt.

Non magnetic substances- are those which are not attracted to the magnet , For Ex. stain less steal, wood and many more.

b. Natural fibers are the one which may be obtained from plants and animals. For Ex. wool - applied from the fleece of sheep.

Man- made fibers are those fibers which are synthetic in nature, made by human beings, For Ex. nylon, polyester and velvet.