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प्रश्न
Why are some substances biodegradable and some non-biodegradable?
उत्तर
- Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms, and some cannot.
- Substances that are broken down into simple soluble forms are called biodegradable substances. For example, Cotton, wood, paper, wool, etc.
- Substances that are not decomposed by microorganisms into harmless substances are called non-biodegradable substances. Examples include plastic, polythene, DDT, etc.
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संबंधित प्रश्न
Give any two ways in which non-biodegradable substances would affect the environment.
List some of the common wastes produced in mining operation and mention how these can be reused.
Differentiate between degradable and non-degradable type of waste.
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 |
What are the most important steps in waste management?
What are the measuress adopted to prevent the spread of disease from sewage water?
Give two-ecofriendly ways of treating kitchen wastes.
Choose the correct option:
Landfill are is a/an:
List waste products produced from an industry.
Can you make something useful of these waste material?Powder containers, cold-drink cans, plastic bottles, shoe-box.
The steps required for the conversion of kitchen garbage into manure are given below in a jumbled form.
(i) Put garbage in a pit
(ii) Cover the bottom of the pit with sand
(iii) Cover the pot loosely with a gunny bag or grass
(iv) Add worms
Which of the following shows the correct sequence of the above steps?
Read the items mentioned in Columns I and II and fill in the related process in Column III
| Column I | Column II | Column III | |
| (a) | Organic waste | Earthworms | (i) ______ |
| (b) | Garbage | Dig pit and fill it with garbage | (ii) ______ |
| (c) | Old newspaper | Paper bags | (iii) ______ |
To what use can you put the following kind of garbage and how?
dry leaves collected in a garbage
Answer the following question in one or two words or sentences:
Who, out of the following should properly dispose of the garbage – father, mother, elder brother, younger sister?
"The change in packaging has resulted in waste becoming non-biodegradable." Giving two examples from daily life, justify this statement.
Give two examples of Biodegradable wastes.
Define the following term:
Pollution
