We do not clean natural ponds or lakes whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
We do not clean natural ponds or lakes whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
Official answer
Natural ponds or lakes are self-sustaining ecosystems with a balance of biotic and abiotic components. They have a natural process of decomposition and nutrient cycling, which keeps the water clean. On the other hand, an aquarium or a swimming pool is a human-made ecosystem that lacks this natural balance and requires regular cleaning to maintain water quality.
Marking scheme
- 1./2 for correct explanation
Hint
Think about the natural processes that occur in ponds and lakes, and how they differ from human-made ecosystems like aquariums and swimming pools.
Quick oral answer
Natural ponds or lakes are able to clean themselves through natural processes like decomposition and nutrient cycling, whereas an aquarium or a swimming pool needs to be cleaned regularly because it lacks this natural balance.
Common mistakes
- 1.thinking that all ecosystems need to be cleaned regularly
- 2.not understanding the difference between natural and human-made ecosystems
Analysis and explanation
This question requires the student to understand the concept of ecosystem and the difference between natural and human-made ecosystems. The student should be able to explain why natural ponds or lakes do not need to be cleaned regularly, while an aquarium or a swimming pool does.
Interesting facts
Natural ecosystems have been able to sustain themselves for millions of years without human intervention.
Human-made ecosystems, on the other hand, require constant maintenance to keep them functioning properly.
Question details
Q26 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section B
- Marks
- 2
- Type
- Very Short Answer
- Chapter
- Our Environment
- Topic
- Ecosystem
- Bloom's level
- Remembering
- Syllabus topic
- Components of Ecosystem
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 2 marks in the CBSE Class 10 Science 2025 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Our Environment" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Ecosystem" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a Very Short Answer question from Section B in the CBSE Class 10 Science 2025 paper.