Advertisements
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give any two ways in which biodegradable substances would affect the environment.
How can the wastes such as paper, plastic and metal objects be disposed of?
Which of the following is the best method to dispose of biological wastes from hospitals?
(a) landfill
(b) recycling
(c) incineration
(d) composting
Write note.
Plastic waste
Differentiate between degradable and non-degradable type of waste.
Give two-ecofriendly ways of treating kitchen wastes.
The question has four options. Choose the correct answer:
Sewage sludge is used as
The question has four options. Choose the correct answer:
Sewage is broken down in
What type of garbage is thrown in green bins?
How can the non-useful component be reused?
Observe the bins and waste material heaps and suggest what materials can be used for preparing handicrafts materials.
What do you do with the leftover food at home?
Which of the following is the best way for disposal of vegetable and fruit peels?
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?
Write 3 sentences on what comes to your mind when you chance to see the following.
Foul odour emanating from garbage at the entrance of your house.
Write one difference between biodegradable and non-biodegradable wastes. List two impacts of each type of the accumulated waste on environment if not disposed off properly.
Some wastes are given below:
- Garden waste
- Ball point pen refills
- Empty medicine bottles made of glass
- Peels of fruits and vegetables
- Old cotton shirt
The non-biodegradable wastes among these are ______.
Define the following term:
Pollution
