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BIOLOGY [2 Mark Question Answer]

Waste Generation and Management · ICSE STD 9 (ICSE - English Medium). 7 questions.

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[2 Mark Question Answer]

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7 questions · timed · auto-graded

Question 12 Marks
Match the items in Column $I$with as many times as possible in Column $II$.
Column $I$ Column $II$
$1$ Cow dung $(i)$ Sugarcane
$2$.Bagasse $(ii)$Raddiwalas
$3$. Old newspapers $(iii)$ Manure
Answer
Column $I$ Column $II$
$1$. Cow dung $(iii)$ Manure
$(i)$ Sugarcane
$2$.Bagasse $(i)$ Sugarcane
$3$. Old newspapers $(ii)$Raddiwalas
$(i)$ Sugarcane
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Question 22 Marks
Give a reason for the following :

Why is municipal sewage is first separated into degradable and non-degradable wastes?

Answer
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.
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Question 32 Marks
Give a reason for the following :

Landfills are coming up fast near large cities.

Answer
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.
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Question 42 Marks
Give reason for the following :

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

Answer
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.
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Question 52 Marks
Differentiate between degradable and non-degradable type of waste.
Answer
DEGRADABLE WASTE NON-DEGRADABLE WASTE
The waste that can be decomposed by micro-organisms is called degradable waste. The waste that cannot be decomposed by micro-organisms is called non-degradable waste.
E.g. Vegetable peel, paper, cloth etc. E.g. Plastic
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Question 62 Marks
List some of the common wastes produced in mining operation and mention how these can be reused.
Answer

Common wastes produced in mining operation:

Coal, Dust, Iron, Copper, Zinc, etc.

Reusing of wastes produced in mining operation:

During operation of getting minerals, a large quantity of waste material is produced. This waste material is called mine tailing. It is the left over. The mine tailing can be mixed with materials to produce tiles and masonry cement.

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Question 72 Marks
Define electronic waste and list at least six items which come under this category.
Answer

Electronic waste is the waste generated by discardedelectrical appliances.

Items which come under the category of electronic waste:

  1. Fluorescent tubes
  2. Medicalinstruments
  3. Toys
  4. Lead acid batteries
  5. Mobile phones
  6. Radios
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[2 Mark Question Answer] - BIOLOGY STD 9 Questions - Vidyadip