Q9 of 18 Page 48

Where do we use the process of recycling? How is it useful? Give examples.

Recycling is used in various industries such as :

a) Paper: We get paper from the wood by cutting the tree. After the paper is used it is recycled to again get back the paper. This is important otherwise number of trees need to be taken down.


b) Compost: The vegetable and fruit peels that are generated in our home is used in making manure that is very productive for the soil.


This is useful as it helps to keep our environment pollution free since the burning of waste leads to air pollution (Incineration) and water pollution (land filling).


More from this chapter

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7

Match the following.

 8

Fill in the blanks

i) Synthetic Fibres are also called as ______ Fibres.


ii) Synthetic Fibres are synthesized from a raw material called ______


iii) Like synthetic fiber, plastic also ______


iv) Clothing labels are______


a) Required by law


b) Identify fabric content


c) Both a and b


d) None of the above


v) Rayon is made of


a) Coal b) Oxygen c) Flax d) Cellulose


vi) A silk fiber’s smooth surface absorbs light


a) yes b) no c) can’t say

 10

Take hair, wool, silk, paper, cotton thread, piece of plastic, thread of sweater, piece of rope and carefully conduct a flame test. Based on smell and type of melting classify them as natural or artificial Fibres.

 11

Prepare a table of various synthetic Fibres which are used to make household articles from them?