Waste Generation and Management Short Answer Biology Class-9 ICSE Selina Publishers

Waste Generation and Management Short Answer Biology Class-9 ICSE Selina Publishers Solutions Chapter-19. Step By Step ICSE Selina Concise Solutions of Chapter-19 Waste Generation and Management with Exercise-19 including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type and Structured/Application Questions SolvedVisit official Website CISCE for detail information about ICSE Board Class-9.

Waste Generation and Management Exe-19 Short Answer Biology Class-9 ICSE Concise Selina Publishers

Board ICSE
Publications Selina Publication
Subject Biology
Class 9th
Chapter-19 Waste Generation and Management
Book Name Concise
Topics Solution of C. Very Answer Type
Academic Session 2023-2024

C. Short Answer Type 

Waste Generation and Management Class-9 Biology Concise Solutions  

Page 199

Question 1.

Define the terms:

(a) Waste

(b) Fly ash

(c) E-wastes

(d) Composting

(e) Mine tailing

Answer

(a) Waste: Waste is any substance which is discarded after primary use, or is worthless, defective and of no use.

(b) Fly ash: Fly ash is gaseous waste of cement industry which contains fine solid particles of non-combustible ash.

(c) E-wastes: e-Wastes are electronic wastes that consist of discarded appliances using electricity like computers, TVs, etc.

(d) Composting: Composting means putting the waste organic matter to decay so that it can be used for fertilizing the agricultural land.

(e) Mine tailing: Mine tailing are the left-over material after the processing of the mined products like copper, silver, gold, etc.

Question 2.

Give reasons for the following :

(a) Broken glass utensils are a kind of non-degradable waste.

(b) Landfills are coming up fast near large cities.

(c) Why is municipal sewage is first separated into degradable and non-degradable wastes.

Answer:

(a)

Broken glass utensils are a kind of non-degradable waste as they cannot be decomposed and broken down by living micro-organisms. These need to be disposed off in deep dug out pits so that they do not cause any harm. However, sometimes broken glass in large quantities can be used in glass industries after melting them.

(b)

Landfills are coming up fast near large cities due to huge population growth and lack of using efficient and safe disposal method. As construction activities are very active, new colonies are being raised and construction units have become very active. These produce large quantities of waste stones, pebbles, broken bricks and wood waste. Mostly, these are used as landfills. One can see heaps of landfills in the suburbs.

(c)

Municipal sewage is first separated into degradable and non-degradable wastes because degradable wastes can be broken down into non-toxic waste in septic tanks, while non-degradable waste needs to be dumped or buried at safe places to avoid any hazardous effects.

—  : End of Waste Generation and Management C. Short Answer Class-9 ICSE Biology Solutions :–

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